The unstable operation of the engine causes a desire to identify the reasons why the engine is not gaining momentum, or does not develop sufficient traction, and what causes breakdowns. Imagine, you press the gas pedal, and the engine simply “refuses” to obey the command, and there is no increase in speed.
Or the engine is gaining momentum until a certain point, and then as if something is holding it, but the power does not develop. The task of diagnosing this phenomenon is quite complex, which can be caused by many factors.
One of the common reasons that the engine cannot gain speed and develop enough power is a fuel system malfunction. For all types of engines, regardless of the type of fuel, the fuel system should be checked for operability in the first place, and especially the technical condition of the fuel pump.
It is a faulty fuel pump that makes the engine “starve”, hence its very sluggish work. As for diesel engines, here first of all you need to check the nozzles and plunger pairs of the fuel pump, the malfunction of which leads to the fact that the engine loses its power, and often refuses to start.
Problems with the electrical part
The reasons why the engine is not gaining momentum can also lie in various defects in the fuel system, which lead to the fact that air leaks through the depressurized areas (hose breakdowns, leaking washers), which is extremely detrimental to the operation of the fuel system. It is also worth checking the filters of the fuel system, since dirty and clogged filter elements lead to the fact that the motor power does not develop.
On injection engines, it is necessary to determine how the marks of the gas distribution mechanism are set, since the moment of ignition and injection of the fuel mixture depends on this. You also need to check the timing belt tension, as well as the correctness of its installation, since its improper landing and installation of teeth can also affect the development of the power of the car engine itself.
After checking the fuel system, the engine ignition system follows. The first step is to check the condition of the spark plugs, especially their tips. Pay attention to the candle insulators: if they have brown longitudinal deposits, they must be replaced immediately. If the tips are in tan, then it must be removed and cleaned.
For this purpose You can use coarse sandpaper. Now you need to carefully examine the condition of the distributor and high-voltage wires. Then it will be necessary to make measurements of the wires so that one of them does not possess too much resistance, or so that there is no break in it.
A ballast block may malfunction and may also cause the problem in question. To find it, raise the hood and under the windshield it is easy to see the ribbed block. This is ballast resistance.
Another reason why the engine does not develop power is the suction of air into the cylinders, on the way after the DMRV. Air flow sensor. The fact is that the DMRV provides information to the computer of the machine about how much air has entered the cylinders, and he, in turn, calculates the composition of the fuel mixture. And since the information is unreliable due to excess air, the mixture is also depleted, which leads to reduced engine thrust.
Replacing this clogged air filter, which must be changed once every six months, will also help solve this problem. The fact is that because of the dirt in the filter, it is difficult to supply air masses, as a result of which the engine is barely gaining momentum and develops very little power.
It will not be superfluous to see on the color of the exhaust: if they are black, the check valve may be disrupted.
One of the possible reasons for the failure of the engine and the impossibility of its development of the necessary power can be a banal breakdown of the car computer. If so, then try to unscrew the nozzles, and you will see how large amounts of gas are pouring from the injector. At the same time, such a breakdown can only be eliminated by replacing the on-board computer.
Considering the reasons why the engine is not gaining momentum, let us pay attention to another important aspect. The operation of the catalyst, which is often clogged. To check it, we unscrew the spark plug, then we start the engine and make several sharp presses on the gas pedal.
If there is a sharp increase in power and the engine picks up speed very quickly, then the hitch lies in it. In this case, it will need to be replaced.
It is inherent in man to ennoble the place in which he spends the lion’s share of his own time. Why the Chinese lawn mower does not develop revolutions? The Stihl FS 55 trimmer of the lawn mower Does not develop revolutions, stalls, goes over the carburetor Thank you for watching. Inhabitants of the cities resort to the services of designers, or try to change something in their own house, acquire the latest furniture, wallpaper, so that when you come home after a difficult day, you can have a moral rest and relax in a suitable environment.
The inhabitants of their own houses, located outside the city, have completely different concerns and requirements. It is necessary to mow bushes, grass, various dead wood in time, to closely monitor the condition of the personal plot and garden.
It is clear that this requires several other means of achieving comfort. And here the new brainchild of engineering comes to the forefront – the lawn mowers of the Stihl office.
Build your house!
About the manufacturer
The history of this German brand begins in 1926. At the initial steps of its own development, the company was engaged in the production and sale of various devices for washing and steam engines. It all began, like many companies, with small production and a narrow focus, which made it possible to focus on the quality of the products.
In the early 30s, the first STIHL chainsaw was released, which was distinguished by its convenience and functionality in those days. The company is developing at a rapid pace, constantly introducing new tools, which gives it the opportunity to enter the international market. Lawn mowers Stihl And already in 1931 the first permanent supply of products to Russia was organized.
At the moment, the company has launched its activities in more than 160 countries, opening new centers and production offices in Switzerland, China and many other countries. This is fully explainable, because the company’s assortment is impressive: motor drills, gas sprayers, mowers, gas trimmers, chainsaws and almost everything else. I would like to note that Shtil chainsaws are very popular due to their own functionality and applicable cost.
Lawn mowing stalls
When purchasing a lawn mower, you must be prepared for the fact that, like in all other similar tools, breakdowns may also appear in it, which will require repair.
But you should not immediately run to the service center and pay large sums to the craftsmen, convincing you of a severe malfunction in the device.
Lawn mowing stalls at high revs on gas
Perhaps the more common complaint related to gas trimmers is: “lawn mowing stalls. "
Naturally, a rather severe malfunction can also be a prerequisite for this. The two-stroke trimmer engine does not develop revolutions stalls. Lawn mowing fs 130 give the gas stalls. But in most cases the situation is even simpler than it seems at first glance.
To cope with such a problem, first, try to understand its causes without the help of others, because after finding out the reason, it is even easier to fight the problem, and from time to time it will even self-destruct.
In fact, the circumstances, this is when the lawn mower stalls at high speeds, there are quite a few of these circumstances.
Why is the Chinese lawn mowing not developing momentum?
Trimmer not gaining revolutions, very frequent problem and of course not always has the usual solution. In this.
Lawn mowing is not gaining momentum, cause malfunctions and its elimination
1st launch of the newest lawn mowers.He removed the grid from the silencer, began to work.
Another is the presence of malfunctions in the power system.
In this case lawn mowing will stall at idle. Champion trimmer stalls at rpm. Goodluck 4300 Lawn Mower stalls at revs video. The mower stalls when you press the gas. At high speeds, the lawn mower stalls. Out of alignment or improper carburetor adjustment can lead to problems with the power system.
Vibrations that occur during the operation of lawn mowers can lead to misregistration.
Incorrect adjustment of the lawn mowers can be corrected by simply adjusting it in accordance with the requirements specified in the instruction manual.
In addition, sometimes gasoline trimmers can stall due to the valve located in the gas tank cap simply clogging or sticking.
To find out, try using a scythe by loosening the gas tank cap.
If the device works properly in this mode, clean the valve.
Features and best models
The Stihl mower deserves special mention, which is distinguished by its own multifunctionality, reliability and ease of operation. Specialists of the company created many varieties of braids, with different features and applications.
For instance, The range of lawn mowers is designed for mowing grass in large spaces.. For this, a self-propelled wheel system was developed, with which it became possible to care for a large territory without spending a lot of time and effort on it. For the design of shrubs, giving them a kind of artistic image and texture, the lawn mowing is perfect. Lawn Mower Does Not Develop Turnover Cause And if you need a lawn mower for tall grass and uneven areas, then follow this link and get complete information on the selection of this type of equipment.
If you need a more subtle approach to harvesting grass, for example near beds or between trees, then a gas trimmer designed for accuracy and precision of execution will do just fine. The company’s specialists provided all the nuances and possible difficulties when working with braids, so they provided them with nylon strings that prevent mechanical damage to trees.
A special AutoCut trimmer head is also used to ensure the normal functionality of the petrol trimmer string knives. This article will tell you about the prices of gasoline manual lawn mowers; trimmers will also help you make the right purchase that you won’t regret.
Two types of mower data are distinguished: amateur and professional models designed for solving problems of a certain complexity. The first category includes models FS 38, FS 45, FS 55, etc. The features and differences of these tools are in the motor power (from 0.9 to 1.2 hp depending on the configuration) and tank volume (approximately 0, 34 l).
Professional trimmers include Stihl FS 130 and FS 250. Consider the characteristics and properties of several mowers, in particular the FS 38, FS 70 and FS 130.
See the features of the device in the video.
Some tricks of working with a petrol trimmer
The summer season has come, and lawn mowers have habitually rattled out on personal plots. Great tool, powerful and mobile. With the help of a gas trimmer, you can also cut the grass and get rid of dried weeds. However, there are cases that the lawn mowing does not start, works intermittently or without developing full power. There is certainly no time for work! And as they say, you pull the starter handle more than mow.
Difficulties with launching arise not only in experienced lawn mowers, but also in new ones. How to be in this situation? There is only one way out – to heed the advice of experts and take advantage of their practical experience!
The model is primarily distinguished by its simplicity and compactness, which is enough for proper care of the adjacent area. The main control keys are located on the handle of the device, which greatly facilitates and speeds up the work.
The price for the Stihl FS 38 is about $ 130.
Engine power – 0.9 hp;
Engine displacement – 27.2 cm3;
Tank volume – 0.33 l;
Engine type – two stroke;
Barbell – straight;
Handle – D-shaped;
Equipment – 2-tooth trimmer blade for grass, glasses for protection, belt;
Weight – 4.1 kg.
Stihl fs 38
This model is one of the most popular on the market! You will find out about all the units that are included in the rating of the best lawn mowers here.
You bought yourself a new gas trimmer and you immediately got into trouble. Very bad start. If you mow a little and then turn it off, then turning it “on hot” is an even bigger problem than “on cold”. What to do with it, I won’t know how to start it right?
The instructions for the lawn mowing plant are as follows:
1. Turn on the ignition.
2. Pump fuel with a silicone button (primer) located at the bottom of the carburetor. It is necessary to do as many clicks (or a little more) as written in the instructions, usually around 8-10.
Video: Why the Trimmer Doesn’t Gain Speed When Mowing
3. Close the choke.
4. Secure the throttle lever with the stop button at higher speeds.
5. Pull the starter handle 2-3 times. The engine should "grab."
If the engine "grabbed" and stalled, then you need to turn the choke to position 1/2 and try to start again. If the engine starts, then we dump the gas and put the air damper in the "open" position. Getting started.
Carrying out fuel pumping manipulations, one should not be afraid to overfill it. If this happened, and, as they say, “they filled the candle”, then you do not need to unscrew it, just turn the air damper to the “open” position and, while holding full throttle, simultaneously crank the engine with a 2-4 times starter. After that, you can start the engine and get to work.
She is more advanced model, characterized by higher power and multitasking. An anti-vibration system is provided, which can significantly reduce the impact of a running engine on the handle.
The time for continuous operation of the lawn mowers is indicated in the trimmer instructions. On average, we mow for 15-20 minutes, after which we muffle the trimmer and let it cool for 3-5 minutes. Also, the duration of continuous operation is provided by weather conditions. In hot weather, when mowing tall grass, weeds, under heavy load, the trimmer overheats faster.
Many problems with lawn mowing are due to improperly prepared fuel mixture. In two-stroke engines, lubrication is done with special oil (not ordinary motor oil!) Mixed with gasoline. If the oil is not mixed with gasoline, then the lawn mower will quickly fail. Oil / gasoline is mixed in the proportion indicated in the trimmer instructions. This is usually 1:40 or 1:50.
The question often arises: the proportion of 1:50 is how much oil and gasoline?
The numbers mean the following: fifty parts of gasoline are taken per part of the oil. Hence: 1000 ml (1 liter of gasoline) is divided by 50, we get 20 ml, i.E. 1:50.
Thus, the composition of the fuel mixture (gasoline / oil) in any proportions can be calculated. To add oil to gasoline not “by eye”, it is advisable to take a 20 ml medical syringe, draw oil into it and “inject” into the tank to prepare the fuel mixture.
Building and Cottage in plain language
What to do if the petrol trimmer is not gaining momentum?
If you have ever purchased a trimmer that works with gasoline, then you probably had to deal with the problem of turning on the trimmer, as well as with such a problem as a gas trimmer does not gain revolutions.
That is why this article was created.
So what to do if the trimmer that has been working for you for several years now suddenly just stops gaining momentum and the motor simply stalls? In this case, you and I should consider a number of problems associated with stopping the motor.
The motor may stall under various circumstances. Why lawn mowing revs. I can’t get it off the ground. And it’s gaining momentum from the floor. Sometimes the cause of incorrect operation of the trimmer running on gas is the clogging of the air filter.
This filter is one of the main reasons why the gas trimmer may stop working.
Different rubbish very often gets into it, dust particles get there, which also clog the filter, so it needs to be cleaned and washed every month, and maybe more often, it all depends on how much power the gas trimmer has, and also how much Often you use this device.
For the period of engine break-in (this is approximately the work of the trimmer on 2-3 tanks), the amount of oil can be increased. For example, mix it with gasoline in a ratio of 30: 1.
A small amount of oil mixed with gasoline leads to increased wear of the piston-cylinder group. An excess of oil in the mixture is not so fatal, but also harmful. Coking of the piston rings, rapid formation of soot in the combustion chamber, and a drop in engine power can occur. In addition, the coke screen of the muffler is coked. Therefore, some users (after the end of the warranty period for the trimmer) recommend dismantling it.
The gasoline used in the lawn mowing machine is AI 92. The brand of gasoline is precisely prescribed in the operating instructions. Do not try to “force” the engine by pouring 95th gasoline into it. This can lead to overheating, unstable operation of the trimmer and breakage.
It is not recommended to leave fuel in the trimmer tank during a long break in work. It is better to finish the working day, having fully worked out the whole mixture. If this is not done, then, because during the night the gas from the engine evaporates, and a thin film of oil remains, the carburetor jets may become clogged. This will cause difficulties the next time you start the engine.
It is also necessary to observe safety precautions when storing fuel. Many pour gasoline into a plastic water bottle. Is it worth it?
The model belongs to professional models, so the goals set before it will be slightly higher. It is designed for mowing rough grass, harvesting hard shrubs and young trees.
It provides the latest engine of high power, not emitting a large amount of harmful emissions.
The price for the Stihl FS 130 is about $ 400.
Engine power – 1.9 hp;
Engine displacement – 36.3 cm3;
Tank volume – 0.53 l;
Barbell – straight;
Handle – T-shaped;
Complete set – shoulder strap, two-blade knife;
Diameter of fishing line – 2.4 mm;
Weight – 5.9 kg.
The spread in prices for these models does not mean any difference in quality, first of all, Each Stihl mower is designed for a specific type of work.
It is clear that there is no point in acquiring a more expensive and powerful model if you have a small plot or lawn in front of the house. Simpler models will perfectly cope with this task, but the word “simplicity” is not used in a derogatory form here. More powerful mowers are designed to handle large areas with overgrown and thick surfaces, hence the difference in price. If you are confused in such a variety of tools, then do not be upset, but feel free to click here and we will tell you how to choose a lawn mower for a summer residence.
Characteristics of the model in the video.
However, no matter which model you choose, you must follow certain operating rules recommended by the manufacturer in order to avoid possible breakdowns.
Lawn mowing not develops momentum.One more cause
Chinese lawn mowing Husqvarna analogue reason does not develop turned out to be very simple (see video)
If you have done the filter operations, but the operation of the gas trimmer has remained the same, the gas trimmer is not gaining momentum, what should I do?
Then you should try to remove the filter from the device in order to provide the so-called “relief” of the trimmer. Why the Chinese lawn mowing does not develop momentum, the reason is Husqvarna. Should help.
The next and quite common problem when working with a gas trimmer is that it simply stalls and does not give any signs of life.
In this case, the problem may be as follows:
The last and most common reason for the breakdown of the gas trimmer is that the cable, which is located in the carburetor section, simply slept.
Therefore, make sure in advance that it is well tensioned, but not to the limit, otherwise if the load on the gas trimmer is too heavy, this small cable may crack and then you will definitely have to contact the service center, and then also throw a lot of money down the drain.
In no case should gasoline be stored in plastic containers from under water. When mixing the fuel mixture, a static charge builds up, you can catch a spark.
Therefore, at gas stations they are not allowed to refuel gasoline in plastic cans, only in metal ones. Before pouring gasoline into a metal canister, it is better to put it on the ground, so the static is removed from the body.
But there are situations when simple manipulations with the lawn mowing do not help. The engine still does not start. In this case, we check the power supply and ignition system, guided by the rule "the engine does not work if there is nothing to burn or nothing to set on fire."
Recommendations for use
It is necessary to take temporary breaks in work. Lawn mowing does not develop speed Diagnostics and trimmer mowing stalls at. This is necessary so that the engine of the device does not overheat and does not fail prematurely. Lawn mowing does not develop Dismantling a chainsaw Stihl 180 Stihl FS 55 is not gaining momentum? Yes. For amateur models, a break is provided every 20 minutes for the same time. For professional mowers, interrupt work every 50 minutes, in which case the downtime should be at least 10 minutes.
It is necessary to monitor the condition of the fuel tank. If you do not plan to use the mower for a certain time, it is better to drain the remaining fuel from the tank compartment. This will help prevent damage to engine parts.
Gas trimmer loves cleanliness. It is necessary to monitor the cleanliness of the air filter and fuel. It is better to stand for gasoline purchased at a gas station for 2 days and pass it through the simplest filter – a piece of bike stuff.
We check the electrical equipment as follows:
1. Unscrew the candle, inspect the gap between the electrodes. We set the correct gap between the electrodes in the "grandfather" way. We take a razor blade, scrap it in half and insert a home-made probe between the electrodes. If the blades fit tightly, then the gap is ideal.
2. We put a cap of a high-voltage wire on the candle and lean the candle against the metal surface of the engine. We pull the starter several times. If the spark strikes well at one point, then the gap is adjusted correctly. If not, the spark is weak or “wandering”, then it is necessary to re-adjust the gap between the electrodes.
Also in electrical equipment, an ignition coil may be punched. In this case, the lawn mowing does not start or starts and works intermittently, and then stalls, or does not start up to the “hot” one at all.
You can check the serviceability of the coil in the same way as when checking the spark: unscrew the candle, lean it against the body of the trimmer. If there is no spark when the starter is jerked, or it appears every other time, the coil must be changed.
If everything is in order with the electrical equipment, then we check the carburetor.
Vacuum carburetors are placed on trimmers. When disassembling, cleaning or rinsing, you must be extremely careful – in no case do not disassemble the lower part of the carburetor, where the primer is located. The air filter (it is visible if the protective cover is removed from the carburetor) must be washed with detergents. Best for washing dishes. After drying, put back. We wash the carburetor with clean gasoline and purge all the holes with a pump. The gas line filter is also washed, then everything is dried and collected. Usually, after all the manipulations, the trimmer starts to work.
Thin cable instead of fishing line, is it worth it to put on a lawn mower?
This idea comes to the mind of almost everyone who had to mow 10 acres overgrown with tall grass. At first glance, the idea seems good. The cable is stronger than the fishing line, it does not wear out so much. However, not all so simple.
If you put the cable in place of the fishing line, without the possibility of its release, reliably fixing the two ends of the cable and cutting them off by welding (a drop of molten metal keeps the cable from opening). Such a tool "knocks" the grass at a time. Cutting off the shoot to about a finger thick. Stones are not as afraid as a disc. There is a truth, a problem: pieces of wire rope break off during wear, and these twisted wires remain in place of mowing. If you step on them, you can get hurt.
But the pieces of cable left on the field are half the trouble. The fishing line, breaking off, weakens dynamic impacts on the transmission and engine, the cable does not give such an opportunity. The result is a quick wear of the lawn mowers.
Any braid has a knife on the protective cover that cuts off excess fishing line after winding, and the cable can no longer be cut. If part of the cable breaks off, then the result is an imbalance, increased vibration. Bottom line: the shaft drive bearings are broken.
You also need to remember that a piece of cable unwound by centrifugal force during rotation of the trimmer head flies like a bullet. Imagine what will happen if he gets in the leg or someone in the eye?
The use of a cable, wire, multi-core cable instead of fishing line leads to a quick breakdown of the trimmer. In addition, this is a direct violation of safety precautions!
Experienced users recommend buying a fishing line with an asterisk profile. Compared with a round one, it mows much better; stems with a finger thickness of a fishing line with a diameter of 3 mm cut into a light, and less is consumed.
Reasons and Repair
I want to share my experience in restoring the required power of a trimmer with a gasoline engine.
One day in early June, I began to notice that my trimmer model GT22GES (manufacturer "ECHO") began to lose its former power.
In the process of work when mowing grass, even with a slight increase in load (grass is taller and denser), the speed fell and the work efficiency was no longer the same as it was before.
Before the trimmer did not notice such obstacles at all. With a sharp click on the "trigger" without load, the speed increased slowly, as if reluctantly.
I took the user manual for the trimmer, found in it the section "Faults and their elimination." I chose a suitable fault in the table, which is described something like this: “The engine is not accelerating well or decays.”
Possible causes include contamination of the air filter, fuel filter, clogged fuel tank drainage hole, spark plug, carburetor, clogged cooling system, clogged exhaust channel or muffler.
As it turned out, the list of possible reasons is extensive – where to start?
At first I looked visually at the air filter, drainage hole, air radiator, all this turned out to be in a normal condition.
Then he decided to look from the end of the list, that is, check the exhaust system – the exhaust channel and the muffler.
To do this, removed the spark plug tip, unscrewed 3 screws and removed the plastic muffler protective cover (in the drawing in the Manual under No. 15). Then, unscrewing the two long screws, carefully removed the muffler, so as not to damage the two gaskets that are present there.
Premonition did not deceive me. The exhaust channel of the engine cylinder (through which exhaust gases exit the cylinder) was 30 to 40 percent clogged with soot.
So that was the cause of my trimmer’s frustration!
It looks like the exhaust channel
Carefully, so as not to damage the piston surface and to prevent foreign products (in other words, the very soot) getting into the cylinder, I completely cleaned the exhaust channel of soot, carefully blew the channel with a pump.
I used a knife as a tool (but only at the edge of the canal), and in the depth of the canal I used a wooden and plastic spatula of suitable sizes.
The silencer turned out to be pretty clean both inside and out.
After the assembly, I started the trimmer, warmed it up a bit and tried to mow – the engine worked like new, the power increased noticeably, it didn’t mow the grass, but cut it (3 mm fishing line).
It’s nice that the device began to work perfectly and doubly pleased that he himself was able to find the malfunction and fix it.
It is likely that such a problem can occur in other models of trimmers, because the design for them is approximately the same for all and all trimmers have an exhaust channel and a silencer.
Why do the revs fall on the trimmer
This common problem has a number of different causes. During operation with the device, one may encounter both obvious malfunctions, the signs of which are clearly traceable, and asymptomatic cases. The first option is the simplest from the point of search for the problem. If the trimmer is not gaining momentum and there are no clear signs of damage, then you will need to consistently check the most typical cases of malfunctions, and if a cause is found, eliminate it.
Possible causes of malfunctions in electric braids
When operating the trimmer, on which the electric motor is installed, problems also arise with a set of revolutions. But they are caused by completely different problems, compared to fuel braids. The electric motor does not develop the required rotation speed in such cases:
If the voltage acting in the supply network is lower than the rated value for the electric motor by more than 10%;
In case of malfunctions in the soft start system (if this unit is installed);
When there are problems with the brush assembly;
Electric brush assembly
In case of burning motor windings;
If jamming of the rotating parts occurs.
To eliminate the voltage problem, you need to use a multimeter or tester to check its value in the outlet from which the power of the electric braid is taken. If it is less than the minimum acceptable value, then to increase it, you will need to turn off all electrical appliances or install a stabilizer.
A prerequisite necessary for the normal operation of the trimmer is the use of an extension cord with a cross-section of conductors corresponding to the power of the engine of the braid.
To repair the soft starter, you will need to have the appropriate knowledge of electronics, so it is better to contact a service center. They will determine its maintainability or the need for replacement. You can independently check the button or find the block diagram and try to figure it out.
The brushes can wear out, as a result, the contact will disappear, which leads to motor stops. Brushes are easy to replace. Features of the process are determined by the applicable lawn mowing model. Along the way, you will also need to clean all contact surfaces.
If the windings burn out, if you continue to mow grass or shrubs, the electric motor will quickly burn out. This will be accompanied by the appearance of a burning smell, up to the melting of individual parts. You will need to replace the electric motor.
The wedging of the rotating parts occurs for various reasons. To identify and eliminate them, you will need to sort out the drive unit. There are models in which the number of revolutions is automatically adjusted depending on the load, increasing as it increases – their idle speed decreases.
The video shows an algorithm of actions to identify the most common causes for which the trimmer does not gain the required speed:
The market has a wide selection of trimmers from various manufacturers. They are characterized by common reasons why the momentum is falling. Also, each unit is equipped with an instruction manual. In it, the corresponding section contains the necessary recommendations on this issue regarding the model used.
If in the process of self-troubleshooting a positive result was not achieved, it is better to seek the help of specialists. Also, professionals should be involved in solving the problem in the absence of minimum experience and skills in such a case, so as not to harm. The most difficult unit is the engine. Only experienced craftsmen are allowed to work with it. When the lawn mower is under warranty service, the best option is to contact a service center where they will carry out diagnostics and repair of the equipment.
A beautiful lawn near the house plays a decorative role, harmoniously combines different parts of the landscape composition and creates a comfortable atmosphere in the garden. It is impossible to maintain the attractiveness and “neatness” of grass cover without the use of a lawn mower.
The range of modern equipment allows you to choose the optimal type of lawn mower, based on the use of the site and its area. If you wish, you can assemble a lawn mower from improvised means – this is the best option if you want to save money and create a useful thing with your own hands.
Why do you need a lawn mower
The main types of lawn mowers
Device and principle of operation of an electric lawn mower
DIY lawn mowers
Selection of work units and parts
Electric mower assembly
The pros and cons of a homemade lawn mower
Lawn Mower Safety
Why do you need a lawn mower
The lawn mower replaced the traditional tool – a scythe. Mechanical, electric, and gasoline mowers are used wherever a neat and tidy lawn is needed: in parks, gardens, stadiums, and adjoining areas.
The use of lawn mowers gives a number of significant advantages:
The device cuts the vegetation to the same height throughout the plot. When forming grass cover, the height of the haircut is the main parameter.
Ease and speed of a lawn mowing.
If you use a model of a lawn mower with a grass catcher, then after cutting you will not need to work with a rake.
In the garden, the lawn is used as a background for bright elements of landscape design, planted in front of group or solo plants. A perfectly flat emerald lawn is a great place for families and guests to relax.
The main types of lawn mowers
All lawn mowers can be classified according to three main criteria: type of food, method of movement and type of knives used.
Depending on the type of food, the following types of mowers are distinguished:
Cordless Lawn Mowers equipped with an electric motor that receives energy from a removable battery. A lithium-ion or lead power source is supplied. Such mowers are most convenient and mobile, well suited for mowing grass in areas with many obstacles: buildings, flower beds, shrubs, furniture.
Gas mowers distinguished by high power and high performance. Used in large areas for lawn cultivation and grass mowing. A significant plus of such mowers is convenient handling and complete autonomy.
Disadvantages of gasoline lawn mowers:
The mower makes a lot of noise during operation;
The presence of exhaust gases.
Mechanical (manual) lawn mowers work without the participation of the engine – the knives begin to rotate due to the movement of the mower. To mow grass with such an aggregate, a person will have to make a lot of physical strength.
The advantages of a mechanical mower include – affordable cost, saving consumables (gasoline and electricity), as well as noiselessness and environmental friendliness of work.
Electric Lawn Mowers are most popular among gardeners and gardeners. They have good performance and are relatively inexpensive. The only drawback of such equipment is the limited movement (cable length up to 60 m). Electric lawn mowers for summer cottages are self-propelled and non-self-propelled.
According to the method of moving lawn mowers for summer cottages are self-propelled and non-self-propelled. In the first case, the wheels rotate from the electric motor, and the user only directs the mower in one direction or another. When working with a non-self-propelled lawn mower, you will have to make efforts to control the device, since the engine transfers power only to the knives.
The mower drive (front or rear) affects the operation of the self-propelled lawn mower. Front-wheel mowers are maneuverable, but devices with rear-wheel drive are preferable, since the rear axle is heavier during mowing.
In different models of lawn mowers, two types of knives can be installed:
Rotary – one knife with two blades is attached to the shaft; such mowers do better with weeds and tall grass;
Cylindrical – several knives are used at once; such models cut grass cleanly, without damage – optimal for caring for a decorative lawn.
Device and principle of operation of an electric lawn mower
Electric lawn mower has a fairly simple device. The product consists of the following basic elements:
The electric motor is mounted on a platform with wheels. A knife is installed at the bottom of the case, some models of mowers have a grass catcher at the back. A handle with a control lever is also attached to the platform.
Most lawnmowers work on a single principle. An electric motor rotates the output shaft, which in turn drives the knives. Lawn mowers are washed down with electricity through a cord, which limits the path of the device in the area.
In factory models of lawn mowers, you can choose the mowing height, adjusting to the type of grass and the relief of the site.
When choosing a lawn mower, the technical parameters of the device are of decisive importance.
Power. Electric models, on average, have a power range of 0.75-2 kW, the power of gasoline mowers can reach 8 kW. For a well-groomed ground grass you can choose devices with low power, but with a high, dense and unevenly planted grass, only a high-power gas mower can handle it.
Lawn Mower Width. Mechanical and electric lawn mowers have a small mowing width (30-45 cm) – they are convenient to use in compact areas “overloaded” with plantings and decoration elements. Gasoline lawn mowers with a mowing width of about 55 cm effectively cope with areas of more than 10 acres.
Cutting height depends on the type of lawn. Lawn mowers usually have several mowing modes, the most common – 30/45/60 mm – this range is enough to care for the ground, decorative and meadow grass.
Body material. The market includes models made of plastic (polypropylene, reinforced plastic), aluminum and steel. Aluminum housing is the most preferred, as it has good resistance to corrosion, impact and high temperatures. A lawn mower with a steel platform will cost less than a plastic and aluminum model, but the service life of such an aggregate is less, since the steel undergoes corrosion.
In addition to the listed parameters, the following criteria affect the durability and usability of the mower:
The mode of operation determines what happens to the grass after mowing.
Throw to the side or back – after work, the grass will have to be collected with a rake;
Grass catcher – the grass is collected in a special container;
Mulching – a special knife is used, which after mowing cuts the grass; mulch is evenly distributed on the lawn, nourishes and protects it from drying out.
Material and shape of the wheels. The most reliable metal wheels, it is good if they are covered with a tread on top.
Lever. More comfortable models with folding and adjusting handles.
DIY lawn mowers
Selection of work units and parts
Before proceeding with the manufacture of the lawn mower, we will determine what parts and improvised tools can be used as working elements of the device. So, it is necessary to choose the following main nodes:
Frame or ready-made chassis for assembling and securing all parts of the mower;
Components of the control system (power cable, plug, switches, RCD).
Wireframe. An all-metal sheet (thickness 2-3 mm) is suitable for the manufacture of the frame. The sheet is “cut out” in the shape of a lawn mower, and a hole is drilled in the center to install the motor shaft.
You can take any moving mechanism as the basis of the lawn mower: chassis from a wheelbarrow, old baby stroller, etc.
Engine. For a home-made lawn mower, you can use any induction motor (power from 500 kW, speed – about 3000 rpm).
Video: How to Reduce the Speed of a Self-Propelled Lawn Mower
Good performance is shown by the following combination of work nodes:
Mowing (diameter of the circle of rotation of the cutting edge) – 50 cm;
The number of revolutions per minute – 1500;
Engine power – 1 kW.
A three-phase motor lawnmower circuit should contain a working and starting capacitors. The capacitance of a capacitor for an engine with a power of 2 kW is 200 μF, and for an engine with a power of 600 kW it is 60-80 μF.
For a lawn mower, you can take an engine with a conventional electric drill with a speed of not more than 3000 rpm. Such a lawn mower is useful for caring for a small area of lawn, if you need to mow a large area, it is better to install an induction motor – it will work continuously longer.
Some craftsmen install an electric motor on a lawnmower from an old Soviet-style washing machine (from a drive for a centrifuge for drying clothes). The power of such an engine is small – about 200 watts, but due to its weight the engine has a significant moment of inertia. With a well-sharpened massive knife, this will even mow thick, dry grass and young growth of trees.
Photo of a lawn mower from a washing machine
Knives. Strips of tool steel with a width of 20-50 mm and a thickness of 2-3 mm are suitable as knives for lawn mowers. Steel for the knife must be selected solid, but not fragile, otherwise the knife may break off and injure with a flying piece.
The shape of the knives can be performed in two versions:
One long knife (30-50 cm) attached to the frame. The ends of the knife are sharpened, and act as incisors.
Two short knives (50-80 mm) attached at the edges of the platform (frame). Knives can be installed with a small angle or straight.
The cutting edges of the knives can be slightly bent down, like a factory lawn mower. With this form of grass is not so much wound on the motor shaft.
Wheels. The size and location of the wheels must be selected so that the knives are above the ground at a distance of about 5-6 cm – this is the optimal cutting height for the garden.
The choice of the number of wheels depends on the preferences of the manufacturer. Two wheels allow the device to be more maneuverable and work at different angles, three or four wheels provide an even mowing of grass.
Wheels can be taken from the same car, an old baby carriage, or made independently from thick plywood and bearings.
Electric Lawn Mower Assembly
After the work items are selected, you can proceed to assemble them. Consider the order of the work:
From a metal corner (2525 mm) weld the frame. A platform for installing the engine and knives will be attached to it.
At the corners of the frame, weld small racks from the same corner. The racks will be used to secure the wheels of the mower. If a three-wheeled device is manufactured, then two wheels must be mounted on the side of the control handle – it will be easier to raise the front of the unit for a turn.
As a result of the work done, it should look like a trolley, if you use a ready-made chassis from a stroller or a wheelbarrow, then the previous steps do not need to be performed.
From metal pipes, make a U-shaped control knob, picking its height in height.
Weld the handle to the mower platform.
Drill a hole in the platform.
It is advisable to weld a protective arc from the front of the frame. It can be made from a metal pipe of square section 1010 mm. The protective frame limits the mower’s movement, protecting trees, flowers, shrubs from accidental mowing.
“Cut out” the knife and sharpen the cutters. Drill a hole in the middle of the knife (diameter – about 8 mm).
Install the electric motor on the platform so that the motor shaft exits into the prepared hole.
Install the knife on the motor shaft.
Center the knife – scroll manually and make sure that the knife rotates smoothly, without distortions. If the knife is not installed smoothly, then it can be balanced by cutting off excess metal from one end of the knife (the total length of the knife cannot be changed).
Connect the cable to the engine.
On the handle, fix a piece of wire with a switch and a plug. For ease of use, an extension cord can be connected.
The pros and cons of a homemade lawn mower
Practice shows that lawnmowers assembled with their own hands have their own advantages and disadvantages, like any other device.
Advantages of a home-made lawn mower:
Significant savings on the purchase of a new device (prices for electric lawn mowers range from 5,000 to 50,000 rubles);
The ability to use old, unnecessary things to good use;
Own made lawn mower can be repaired by yourself;
The disadvantages of such a lawn mower are:
Cutting height cannot be adjusted;
Sometimes the power of a home-made mower is not enough for mowing too grown or thickened grass;
Lack of grass catcher;
Very often, a hand-assembled lawn mower is heavy – this makes the lawn maintenance difficult.
Lawn Mower Safety
When planning the manufacture of a lawn mower, you must be aware of the danger that the use of a poorly assembled device can pose. There are two main threats: injury by rotating knives and electric shock. Both risk factors are very serious, therefore safety measures must be taken very responsibly.
All places of the electrical wires (on the engine, on the control parts) must be carefully insulated.
To power the engine, you must use a cable with double insulation, having at least three cores.
The lawnmower must be connected to the network using an RCD (protective shutdown). The RCD de-energizes electrical appliances that are energized due to inadequate insulation.
The mower cannot be used without a protective cover.
Work on the site must be carried out when there are no people or animals nearby. A broken knife flies at a very high speed.
Mow the grass in closed shoes.
The work is carried out in conditions of good visibility – in the morning or afternoon.
If the mower’s engine appears in the area of children, it must be switched off immediately.
Wet grass cannot be mowed.
Before turning on the device, you must check the condition of the knives, case and electric cable. Particular attention is paid to the strength of the fasteners of the working units of the mower.
Creating a beautiful lawn and maintaining it in order is not an easy task. And to make it easier, you need a reliable assistant – a lawn mower. There are many good and different models on sale. And although everyone has the same purpose, in a number of parameters they differ from each other. Let’s try to figure them out.
What are lawn mowers?
By the way of moving lawn mowing machines are divided into:
Manual (trimmers) that are held in hand when mowing,
Wheeled hand, which you need to carry on the lawn,
By type of drive motor distinguish mechanical, gasoline and electric lawn mowers.
Mechanical Wheel Mowers easy to operate, it does not need electricity or gasoline, but significant muscular effort is needed. They are environmentally friendly, silent and allow you to adjust the height of mowing the grass. The cutting mechanism is a cylindrical knife driven by wheels. Such a tool is good for caring for a young lawn, as the low speed of rotation of the knife prevents pulling out grass with a fragile root system.
Mechanical Wheel Mower
And we will consider gasoline and electric lawn mowers below.
Hand Lawn Mowers (trimmers) fit for regular lawn mowing in a small area even with an uneven surface, as they can mow at any angle. The trimmer is a holder bar, at the lower end of which is a cutting device with fishing line. And with high power – additionally with a circular knife. The mower hangs on a belt on the operator’s shoulder, literally making it easier for him to work.
Trimmer can be equipped electric or gasoline engine. Electric is located on the lower or upper end of the rod, and gasoline – only on the upper.
A protective cover limits the mowing edge and protects the legs of the mower from injury. During operation, the left hand holds the handle of the bar (adjusting, if necessary, the height of mowing the grass), and the right hand holds the handle with the engine control button.
The main advantage of trimmers – the ability to mow grass in uneven areas and close to bushes and trees. But maintain the same mowing height at the same time will not work.
The electric trimmer is powered by a household power outlet. To his merits can include:
Environmental friendliness (there are no exhaust gases and noise).
Disadvantages of the electric trimmer:
Binding to a network (outlet),
The presence of a stable voltage,
Forever disturbing cable on the lawn
And the cable itself has a limited length: you can’t squint far from home.
Battery Trimmer – the same as the electric one, but the engine does not work from the outlet, so you can mow at any distance from the house. This is his basic convenience. However, the mowing area is determined by the capacity of the battery.
The gas trimmer is designed to work in large areas. Therefore, it is especially in demand by summer residents, and owners of country estates, and workers in urban utilities. However, working with it requires some preparation.
This type of lawn mower is distinguished by an enviable mobility, increased power and practicality. It can be used for mowing not only lawn grass, but also weeds and bushes. And professional models are able to cut stems up to one and a half centimeters thick.
However, even with a small fuel tank, such an assembly:
Weighs quite a lot,
Requires a mixture of gasoline with oil,
Pollutes the environment with exhaust fumes,
Makes a noise.
But it can work in any weatherat.
The convenience of mowing grass with a trimmer is determined by several points, and one of them is the location of the engine.
Trimmers engine bottom on sale a lot. Most often they rechargeable low power. They overheat quickly, so they require frequent interruptions in work. Protection against moisture and mechanical stress is poor. They cannot work on morning dew and immediately after rain, otherwise a short circuit may occur. Engine Trimmer
Trimmers engine top more practical, more balanced and more powerful, require less mowing effort, and therefore more comfortable in operation. They have good cooling (less overheating), and, therefore, greater performance.
Engine Top Trimmer
Among the trimmers with an upper engine, I especially want to highlight knapsacks. Their engines are secured behind their backs (like a schoolbag), which significantly reduces the load on the hands and much less restricts movement.
Knapsack petrol trimmer
A nice trimmer option is anti-vibration system. It allows you to reduce the vibration load on the shoulders and hands, protects the arms and back of the mower.
Powerful gas trimmers to reduce the burden on the hands equipped with ergonomic handle, similar to a bicycle wheel. On the right handle are buttons to control the operation of the tool. When buying a trimmer, make sure that the handle and button layout on it are comfortable for you.
It is not necessary to purchase an expensive and bulky lawn mower to cut grass on a small lawn; it can easily be replaced with a gasoline / electric trimmer. The device of these machines is quite simple, they are convenient to use and unpretentious in maintenance. But sometimes problems do occur. One of them. when the trimmer does not develop the maximum number of revolutions. will be discussed in this article.
Trimmers are reliable and durable (of course, subject to proper care). Most often, malfunctions arise due to contamination of structural elements.
If the engine of your brushcutter does not start, does not gain momentum, does not reach the power you need, or suddenly stalls, the cause may be:
low-quality fuel (fuel mixture), it may be in long-term storage or in non-compliance with the formulation of the mixture;
grass wound on the shaft of the fishing line / knife head;
clogged air filter / muffler;
The first three reasons are pretty easy to eliminate. If the matter is in the mixture, it is necessary to pour the old fuel from the tank, prepare a new emulsion of high-quality gasoline and engine oil (if your engine needs a mixture) and pour it into the fuel tank. If the trimmer runs on clean gas, it’s still easier.
In the second case, it is necessary to carefully release the trimmer parts from the wound grass.
If the filter is clogged, you can try to rinse it. If this procedure has no effect, replace it with a new one.
The last reason why the brushcutter does not work properly will require a little more knowledge and skills from you.
In order to correctly adjust the carburetor of the brushcutter, a certain procedure must be followed. First clean the air filter thoroughly. It is easiest to rinse it (it is advisable to flush the filter with water regularly after 9-10 hours of operation).
After that, in the scheme of your trimmer, which is in the instruction manual of the device, find the adjustment screws. Usually there are three of them: the first is responsible for supplying fuel, the second for idling, well, and the third is designed to limit the number of maximum engine speeds.
Next, turn on the unit and wait for the engine to warm up.
Slowly tighten the first adjusting screw (fuel mixture supply). Catch the moment when the motor starts to stall, and turn the screw in the opposite direction by 45 degrees. If you do not have time and the motor stalls, you should turn the screw 90 degrees. Open the throttle and see how the speed increases. Next, you should slowly unscrew the screw (each turn is the same 45 degrees) until the moment when at full throttle the motor begins to firmly produce a maximum of revolutions.
Video: Gas Trimmer Does Not Gain Speed: Causes And Features Of Repair
The second screw, as mentioned above, controls the engine idle speed. By weakening it, you reduce the number of revolutions, twisting. increase. The screw must be adjusted so as to ensure reliable motor operation at low speeds. For a better start, speed up the engine a little. At the same time, make sure that the motor makes several dozen revolutions before the movement of knives / reel with fishing line. If the engine starts poorly, tighten the screw a little.
After you have adjusted the first two screws, test the operation of the device at maximum engine speed. If necessary, you can limit it (maximum). this will protect the motor from "boiling". To do this, you need to tackle the third screw. Loosen the lock nut until the adjusting screw can be easily turned. To increase the maximum number of revolutions, the screw must be loosened, to reduce. on the contrary, tighten. Lock the position of the screw with a nut. Test the motor again.
Check the position of the screws regularly. the high level of vibration inherent in the brushcutters can cause them to shift involuntarily.
Remember that carb adjustment is not the final procedure. During the operation of the brush, you most likely will have to bother with it more than once, because an unbalanced carburetor means both increased fuel consumption and a quick failure of candles, not to mention a decrease in the power and performance of the device.
If you are unable to tighten / loosen the adjusting screws normally, it may be because the spring is too thick and stiff. Then you can choose a more suitable one instead.
If your unit does not need pure gasoline, but its mixture with engine oil, strictly observe the proportions indicated in the operating instructions. There is one trifle: the recommended ratio is 1: 25 (for all brands of oil) or 1: 50 (for “native” oils). Try the first ratio first. If with such a recipe oil drips appear on the motor and a strong deposit forms on the candle, halve the proportion of oil. Usually this contributes to the disappearance of traces and reduce the amount of soot.
To clean the electrodes of the candle from combustion products, you can use a fine-grained "sandpaper". Wipe them with a dry cloth first and then gently scrub them with sandpaper. If the space between the device’s body and the insulator is also clogged, a regular, unclaimed paper clip will help to clean it. To do this, soak the candle for a short time in diesel fuel, and then scrape off the dirt. If the blockage is small, one procedure is enough. With severe contamination, sometimes you have to repeat it several times. After thorough cleaning, the candle must be wiped dry from the remains of diesel fuel, and then it can be used for its intended purpose.
Please note that Lawn Mower (gasoline, electric or battery) of foreign manufacture requires a little more care than domestic ones. In particular, many people insistently recommend entrusting professionals with adjusting the carburetor of a two-stroke engine, especially if your purchase has not expired the warranty period of service.
And finally, one more tip: follow all the manufacturer’s recommendations on the operation and maintenance of the device. So you extend its trouble-free operation.
What to do if the gas trimmer is not gaining momentum, you will learn further.
All rights reserved, 14
The use of any materials without our prior written consent is prohibited.
The trimmer, both electric and with an internal combustion engine (ICE), is an indispensable tool in the summer and autumn for owners of cottages and private houses.
With its help weeds, small bushes are easily removed and the lawn is trimmed. But, like any technique, trimmers fail at the most inopportune moment.
To fix the malfunction with your own hands, the user of this technique must first determine the cause of their occurrence.
The main malfunctions of gasoline and electric trimmers
With lawn mowers and an electric trimmer, if we do not consider breakdowns associated with the boom and mowing head, malfunctions mainly occur in the engine area.
Damage to gas trimmers
Typical breakdowns of the gas trimmer, which are most often encountered by the owners of this unit, are as follows:
problems with the carburetor;
fuel supply problems;
the starter is broken;
problems with the air filter;
clogged breather on a gas tank.
Faulty electrical trimmers
Since the device of the electric mower is much simpler than the mototrimmer, there are few reasons for its failure.
It should be noted that the elimination of some of them is best entrusted to a specialist.
Basically, the trimmer stops working normally in the following cases:
malfunction of an electric cable;
faulty control button;
burned-out motor stator winding;
open contact on the engine.
Why doesn’t the gas trimmer start
The reasons why the gas trimmer has stopped turning on may be different, therefore, a phased diagnosis of the device is required.
Fuel tank (fuel quality)
Remember that always before starting the unit a check is required on the availability and quality of fuel. In this case, do not be greedy and economize, as well as “be smart” about the amount of added oil. Everything must be done according to the manual attached to the device, since when the piston group fails, its replacement will cost about 70% of the total cost of the trimmer.
Fill fuel with the expectation that you will completely use it up when doing work. The gasoline remaining in the tank after a while loses its properties and can harm the engine. Therefore, do not prepare the mixture for future use and in large quantities. If the lawn mowing does not start well, try to drain the “old” fuel from the tank, and fill it with a freshly prepared mixture.
Important! Filling the device with fuel whose origin is unknown is fraught with negative consequences. Gasoline must be of high quality, purchased at a gas station, and its brand must not be lower than AI-95.
Candle and candle channel
So, you changed the fuel, but nothing has changed, and the trimmer still does not start. In this case, it is worth checking the candle channel: does it throw it with a combustible mixture.
Often users put the choke in the “OFF” position at start-up, and when the engine starts up, do not put it in the “ON” position, after which it stalls.
Further, an attempt to re-start the ICE leads to the fact that gasoline fills the candle, and the start becomes impossible. To diagnose and resolve a possible problem in this node, do the following:
It is necessary to unscrew the spark plug, wipe it well and dry it. When installing the spark plug in the engine cylinder, it must be dry.
Drain the accumulated fuel from the combustion chamber. This is done through the hole from which you unscrewed the candle.
If there is carbon deposits on the electrode electrodes, it must be removed either with a thin file or a nail file.
Do not forget to set the gap between its electrodes before replacing the part. The clearance on the candle should be 1 mm. As a probe to check the gap, you can use a coin.
Next, assemble the unit, read the start instructions and try to start the engine again.
If the engine does not start, then you will need to check the spark. For this:
unscrew the candle;
put a cap on the high-voltage wire on it;
touch the metal part of it to the cylinder body (to ensure contact, you can insert a pipe wrench) as shown in the figure below;
pull on the start cord so that several engine revolutions occur.
Normally, with each stroke of the piston, a spark should slip between the electrode electrodes. If there is a spark, then the reason that the engine does not start should be sought in other nodes of the device.
To better understand the process of how to test a candle for a spark, you can use this video, where the test is shown on the example of the Soyuz lawn mowers.
If there is no spark, then first check the cable connecting the candle to the coil. perhaps the reason is in it. You can call it using the tester. In the event of a break in the circuit, the replacement of the high-voltage wire will be required.
Also, the cause that the spark disappeared may be a malfunction of the ignition coil (magneto). The figure below shows what the coil (magneto) looks like from the Patriot (Patriot) petrol trimmer.
To eliminate the malfunction, you will need to use a tester to check the magneto trimmer, namely, its primary and secondary windings. On the primary winding, the resistance should be in the range of 0.4 to 2.0 ohms.
If the device shows 0, it means that a short circuit has occurred in the winding, and if infinity is a clear sign of an open circuit. The resistance on the secondary winding should be in the range of 6 to 8 kOhm.
On some coils, it can reach 15 kOhm.
In the event that your lawn mower does not start well or dies immediately after starting, you should pay attention to the air filter, as it may be clogged, as a result of which air does not enter the combustion chamber and ignition of the fuel does not occur.
To check if the filter is in the case, remove it and try to start the engine. If he earned, then the reason is found. The filter must be replaced or rinsed well and dried before installation.
In the event that you find oil in the air filter, it must be washed with gasoline, squeezed well and dried for at least 2 hours before reinstalling.
If the unit still does not start when the air filter is removed, it is recommended to check the fuel filter.
This filter cleans the fuel of possible contaminants. If it is clogged, then gasoline does not enter the cylinder, and, accordingly, the unit does not work or stalls after starting. The fuel filter is located at the end of the intake hose, which is located inside the fuel tank. To get to the filter, you need to remove the plug with the tubes coming out of it.
When removing the plug, the intake hose may disconnect and remain in the tank. It is removed with tweezers.
Next, remove the old fuel filter from the hose and put on it a new one, purchased in advance. You can also clean the fuel filter if you do not have a new one. The filter must be secured to the hose with a spring clip.
Install the intake pipe into the plug and insert the latter into the tank.
It should be noted that in some trimmer models the intake hose is not located on the cork, but inside the tank. You can remove it with tweezers or a hook bent from a wire.
Breather is a check valve, which is designed to equalize the pressure in the gas tank.
If it is clogged and does not allow air to flow towards the tank, then a vacuum forms inside the fuel tank and the fuel stops entering the carburetor.
To check the serviceability of the valve, remove the hose that goes from the tank to the carburetor. If gas does not flow from the tank, then the breather is clogged.
Users of trimmers often wonder: where is the breather? This valve is usually located in the gas tank cap and looks like the following figure.
Cleaning the breather is very simple: disassemble the valve and flush all its components. In some lawn mowers, this valve may be located directly on the fuel tank. You won’t be able to find it right away, since it is hidden from view under the starter housing. Such a breather is cleaned with a regular needle.
The reason that the trimmer has significantly lost power, and when trying to increase the engine speed, it picks them up slowly, is often a clogging of the exhaust channel through which exhaust gases exit the combustion chamber.
It is necessary to remove the muffler so that no burner gets inside the cylinder. Next, clean the exhaust channel of carbon deposits.
This must be done very carefully, preventing carbon deposits from entering the combustion chamber.
After this procedure, the weak power of the unit and the slow set of rotation speed of the mowing head will no longer upset you.
If the compression is insufficient, then starting the engine, in most cases, will fail. To check the compression, you can use a car compressor.
Unscrew the candle from the engine cylinder.
Screw the compressometer into its place.
Start yanking the starter cord the way you do when you start lawn mowing. Do this until the arrow on the measuring device stops moving in the direction of increase. This value will also show the compression force of this engine.
What compression should be? Normally, the compression should be at least 8 kg / cm2. Although even at 8 kg / cm2, some engines do not have idle and stall, as the fuel is not adequately pumped. If your lawnmower does not swing above 8 kg / cm2, you will have to check the cylinder, piston and rings.
Also, poor compression may be due to a loosely screwed carburetor. Check if he is staggering. If so, tighten the fasteners that hold it in place. Also, if the carburetor is loose, you will notice that gasoline is dripping during operation.
Electric trimmer vibrates
Many users of mowers noticed that some time after the device started to work, it begins to vibrate violently.
On some trimmers, mainly in more expensive models, an anti-vibration system is installed in the form of shock absorbers located between the engine and the bar. But in some cases even she does not save from strong vibration.
The reason that a strong vibration appears in the trimmer may be a small amount or a complete lack of lubrication on a rigid or flexible shaft located inside the apparatus rod.
Replacing the grease on the hard shaft is as follows:
unscrew the gearbox located at the bottom of the bar;
after removing the gearbox, you will see the end of the shaft, for which you must pull to remove the part;
after removing the shaft, it is necessary to grease it with plenty of special lubricant “CV Joint-4” or regular. “Litol-24”;
apply a small amount of grease to the shaft and evenly lubricate it along the entire length of the part, including the splines at the ends of the rod (if they work together, the shaft will have to be replaced);
After lubrication, reinsert the shaft into the rod and put the gearbox back in place.
Lubricate the flexible shaft as follows:
unscrew and remove the mowing head;
remove the rod from the electric motor by unscrewing a pair of bolts;
pull the flexible cable out of the bar;
grease the cable with the entire length.
This is done this way: first you need to lubricate the end of the cable, and then insert it into the rod, after which, as it moves inside the pipe, lubricate the part and distribute it evenly on the surface. Then insert the flexible shaft into the electric motor and secure it.
In case the grease did not help, and vibration continues to appear, it will be necessary to change the flexible shaft.
The trimmer is very hot
Trimmer overheating can occur for many reasons:
gasoline does not have the octane rating indicated in the instructions for the unit;
the proportions of gasoline and oil were not observed during the preparation of the fuel mixture;
a mixture of fuel with oil was prepared long ago (the mixture cannot be stored for more than 2 weeks);
the trimmer works beyond the prescribed time;
a low-power trimmer is used on thick and hard grass, the device works with overload and quickly heats up;
shifted towards the bar or the cassette lid is stuck.
The latter happens if you install a mowing head that is not suitable for this unit, or when the axis moves inside the boom. These changes make rotation difficult, the load on the engine increases, and it overheats.
How not to get confused if the lawn mowing does not start
The tool, despite its small dimensions, is a complex technical device. If you study the operating annotation, it turns out causes, why not starts up lawn mowing, known and disposable. It is necessary to exclude the reasons that impede the start of the tool one by one. Usually they start with more accessible nodes with easy health checks.
Everything causes, why not starts up lawn mowing, can be systematized according to the specifics of the operation of individual nodes. In the service center, the malfunctions are systematized:
motor malfunction (piston wear, bearing malfunction, crankcase crack);
fuel consistency failure. clogged pores air filter either carburetor malfunction;
the ignition system does not work;
mechanical failure. leaking hoses, broken wires under the braid, rupture of tubes.
lawn mowing cannot work for a long time. The gearbox and engine will overheat. Mowing can be less than 15 = 20 minutes, making a five-minute break. On hot noon, the operating time is halved. When mowing weeds, sedge, the working time is required to be reduced.
If the launch fails, we begin to find the cause of the failure:
check fuel quality;
make sure the candle is working and the candle channel is clean;
check cleanliness air filter;
make sure the fuel filter is not clogged;
check the purity of the breather;
clean the exhaust duct.
complex causes will be found in the diagnosis of malfunctions, leading to a major overhaul of the carburetor. Such reasons include clogging of the internal channels of the carburetor, wear on the gasket and violation of the tightness of the internal halls with a loss of vacuum. Do it yourself repair of the lawn mowers, if it does not start, will require patience.
Elimination of the reasons why the lawn mowing does not start
The fuel mixture must be prepared with exact proportions of gasoline and oil. In this case, you can not use a different brand of fuel. To prevent the ingress of dirt, gasoline should be left in a glass or metal dish for 2 days. Do not use plastic containers to store fuel. It is necessary to exclude the reasons one by one, the lawn mowing does not start on a hot gas trimmer. Measure the oil accurately with a medical syringe without a needle. Use only freshly prepared mixture without leaving undeveloped fuel in the tank. If the engine is naughty, the lawn mower stalls, when you press the gas, fuel may be to blame.
lawn mowing. On the hot stalls. Possible cause and remedy
Immediately draw your attention that unfortunately it not carburetor. (My Facebook site.
The chainsaw does not start on a hot
Does not start chainsaw on hot.
lawn mowing does not start on hot. pull the trigger and sharply pull the cord several times until the engine starts, then lower the trigger. Does not start. requires specialized repair.
Checking the ignition system, if not lawn mowing, carried out sequentially:
remove the removed candle from soot and dirt, dry it, set a gap of 1 mm;
connect to the high-voltage wire and check for a spark by pulling the starter several times;
if there is no spark, check the integrity of the high-voltage wire;
replace the candle;
dry the candle channel;
at the same time, the operation of the ignition coil is checked, it is faulty if the working candle does not spark.
It is in the event of a malfunction in the ignition coil of the lawn mower that does not start up hot, stalls, works intermittently.
Cleaning or replacing the air and fuel filters will ensure the necessary flow of ingredients entering the carburetor. The air filter can be washed in soapy water or replaced. If a nylon fabric is used, it is washed, the porous felt filler is replaced. The fuel filter is changed carefully, without leaving the suction pipe open. Do I need a replacement air filter, can be determined if the engine with the air cleaner removed is started. Do I need to change the grid on the fuel supply, if the lawn mowing does not start, a dry candle will tell.
Breather, air inlet for gas tank. Lawn mowing does not start or Causes of malfunction of the lawn mowing does not start on hot. If it becomes clogged, a vacuum is created in the tank and the mixture does not enter the carburetor. The hole can be purged with air or cleaned with a needle. Clean the exhaust channel, remove the spark retardant silencer mesh.
The chainsaw should work for at least 10 minutes, as the adjustment is carried out hot.
Turn screw N smoothly to maximum speed, then turn it by ¼, counterclockwise, reducing the speed of rotation of the motor shaft.
Idling is regulated by screw T, ensuring that the braid does not rotate.
The screw L is adjusted, first opening the throttle as much as possible, and then gradually reducing the speed to a stable minimum.
After adjustment, a working carburetor with cleaned filters, tested by ignition should ensure the operation of the engine. In the event of a carburetor malfunction, after its repair, the feed system will need to be adjusted again before starting the lawn mowing.
rewind spring malfunction;
a broken or stuck starter pulley;
faulty starter assembly.
The most important malfunction, the elimination of which is associated with the replacement of the engine, may be the failure of the piston group of the engine. The cost of repair will cost about 70% of the cost of the product. that the trimmer does not start on hot and even cold. that the trimmer does not start well. Understand the reasons why not lawn mowing, video will help:
Proper Chainsaw Care
In the instruction manual there are no unnecessary phrases, everything that is offered is aimed at trouble-free operation of the lawn mowers. Cleaning of all parts after each cycle of work contributes to the easy removal of uncured residues and dirt. Only the cooled components need to be cleaned. This technique contributes to the quality of air cooling of the engine and gearbox.
Video: Trimmer Petrol Patriot Bad Gains Speed
When preserving equipment for the winter, carry out an audit, lubricate the gearbox and piston system, wrap the entire saw in an oiled rag and store in a dry place.
It is impossible, it is dangerous for the tool and the health of the mower, to use a metal cable instead of a fishing line. It cuts more efficiently, but the load on the gearbox and motor increases. A worn piece of wire flies with a bullet at breakaway.
Why the hot is bad If the engine starts poorly on Why the trimmer does not start. Effective mowing can lead to early wear on the engine piston group.
For greater mowing efficiency, it is proposed to use an asterisk fishing line profile.
Trimmer Doesn’t Start Hot
Let’s say you do not start the trimmer. In this case, you first need to check if there is enough fuel in the tank, and also evaluate the quality of the fuel consistency. You need to refuel a motorized unit only with high-quality gasoline. It is recommended to use fuel whose brand is not lower than AI-95.
In the near future, the gas trimmer acquired the status of the 1st of the main tools in the arsenal of summer residents. And this is logical, because a motorized scythe allows you to quickly put your personal plot in order.
But from time to time it happens that trimmer does not start on hot and even cool. In such situations, it is necessary to determine the cause of the malfunction without the help of others. Let’s find out what to do if not start trimmer.
The reasons that most often lead to such troubles will be discussed below.
How to start troubleshooting if it does not start trimmer? In situations when the tool stalls immediately after start-up, it is worth inspecting the following units of the unit:
fuel and air filter;
It is the breakdown of the above locations that most often leads to the fact that the trimmer does not start well. Let’s look at how to eliminate such troubles.
Fuel mixture check
Let’s say you do not start the trimmer. In this case, the first thing is to check whether there is enough fuel in the tank, and also to assess the quality fuel mixture. It is necessary to refuel the motorized unit with exclusively high-quality gasoline.
It is recommended to use fuel whose brand is not lower than AI-95. Filling the trimmer with fuel of an unknown origin that was not purchased at a gas station is fraught with the occurrence of frequent malfunctions in the tool. This may cause a malfunction of the cylinder-piston system.
Repair in this case often exceeds the cost of the device itself.
Why doesn’t the gas trimmer start? Incorrect preparation of the fuel mixture, which consists of oil and gasoline, can also lead to this. The proportions in which these components are connected are indicated by the manufacturers in the trimmer instruction manual.
It is extremely not recommended to prepare the fuel mixture in large volumes, that is, for the future. Indeed, with long-term savings, the loss of the defining properties of a substance occurs.
Therefore, if the trimmer does not start, it is worth draining the old fuel and use a freshly prepared fuel mixture.
Diagnosis of the suppository canal
What to do if the used fuel mixture is in perfect order, but the gas trimmer still does not start? The reasons for the failure of the mechanism may lie in the excessive wetting of the candle channel. To diagnose and fix the problem, do the following:
Unscrew the candle. Wipe it thoroughly and then dry.
Drain excess fuel in the chamber through the corresponding spark plug hole.
Clean the old candle if there is soot on its surface. To cope with the task will allow the use of ordinary ladies’ nail files or needle files.
When installing the element in place, set a gap of 1 mm. To check the parameter, just put any coin in the lumen.
Reassemble the function block.
Try to have a trimmer.
The chainsaw does not start on a hot
Does not start chainsaw on hot.
The Chinese lawn mowing will not start. This is interesting.
Spare parts for Chinese lawn mowing Chinese lawn mowing does not start. it
Drying the candle channel is recommended for at least half an hour. However, in no case should you resort to calcining its elements. After all, heating the spark plug can lead to its final damage.
What to do if the function block was serviced in accordance with the above recommendations, but the trimmer does not start, is there a spark? In this case, it is worth treating the threaded connection with gasoline. The latter does not need to be abundantly impregnated with fuel. It should only be slightly moistened.
To resort to such actions should be to ensure ignition. After all, no matter how strong a spark is given by a candle, there will simply not be anything to ignite in a completely dry chamber.
If even in this case the trimmer does not start, it is worth evaluating the quality of the contact between the high-voltage wire and the candle. In the absence of a spark (in the presence of a reliable connection between these elements), most likely, the problem is caused by a breakdown of the ignition unit. In this situation, you will have to turn to the services of masters who will reinstall the site.
Another common reason why not start trimmer, is the presence of clogging in the filter area. To confirm the guess, it is enough to dismantle the indicated block and try to start the unit without it.
If the trimmer engine starts, you will most likely have to replace the air filter or at least thoroughly purge the old one. In the presence of heavy pollution on a surface of the filtering element it is necessary to use a new grid.
When resorting to such actions, one should not leave the suction pipe completely without a filter. Indeed, the rush in this case may lead to the need to repair the entire piston group of the engine unit.
Cleaning the breather
Often, the engine of branded trimmer models stalls as a result of clogging of the breather. The main task of this component is to equalize the pressure in the fuel tank. In case of contamination of the unit, a vacuum forms here, which significantly complicates the supply of fuel. The problem can be rectified by cleaning the breather with a regular sewing needle.
Stable operation of the trimmer may be impaired due to the accumulation of dirt in the exhaust channel or the formation of blockage on the silencer mesh. This problem most often occurs during the operation of older generation trimmer models. The issue is solved by dismantling the anti-spark mesh and cleaning it.
How to prevent sudden breakdowns during operation of the trimmer?
To ensure that the unit is always in a functional state, it is worth observing several simple rules:
Conduct timely, regular technical inspection of the main mechanical components of the device.
Refuel the trimmer exclusively with fresh fuel, the quality and origin of which is beyond doubt.
Check after each use of the tool whether oxides and deposits have formed on the surface of the ignition system elements.
Avoid heavy load trimmer during work.
In order for the unit to remain in working condition, it is necessary to properly prepare it for storage in the winter. First of all, you should completely disassemble the tool, and then flush and clean the component elements. It is also important to inspect the functional blocks for damage, if necessary, eliminating the deformation of parts, all kinds of distortions, gusts of materials.
When placing the trimmer in storage, it is worth filling the gearbox with enough oil. Then you need to clean the air filter, partially disassemble, blow and rinse the engine of the unit. Having dried all the mechanisms, lubricate the movable elements. To process the piston system with oils, you must first remove the spark plug.
Then you need to move the piston to the extreme position, after which pour a small amount of oil into the spark plug hole and scroll the crankshaft. If stored gas trimmer in the offseason it is planned not in the house, it is recommended to tightly wrap the engine of the unit with an oiled rag.
This will avoid the development of corrosion on the surface of important components of the mechanism.
As you can see, there are a number of reasons why a gas trimmer may not start.
However, with a serious approach to the problem, the malfunctions indicated in the material are quite easily eliminated by one’s own hands. Seek help from specialists only in case of critical breakdowns.
In the end, you should always correlate the cost of self-repair with the prices for servicing the unit in the workshop.
Why the lawn mowing does not start. we troubleshoot
Caring for a personal plot, summer residents periodically encounter the fact that the lawn mowing does not start. There are many reasons for tool failure. For the correct diagnosis of the problem, the owner of the unit useful at the cottage needs to know the device and the principle of operation of its individual parts.
Since the gas trimmer is a complex device, you should carefully read the operating instructions before starting work. Very often they simply ignore her, or get to know her superficially.
As a result, when the tool stalls or refuses to start, the question arises. "Why doesn’t the lawn mow start?" A long seasonal break in work, improper storage and untimely maintenance of the trimmer will cause a lot of trouble to the summer resident, to eliminate the reasons.
Where to start diagnosing lawn mowers
If the lawn mowing does not start or immediately stalls after start-up, it is necessary to check all the main components and assemblies in sequence. The verification algorithm is as follows:
Fuel tank (fuel quality);
Candle and candle channel;
These nodes are most often the source of major problems that can be fixed after a thorough inspection.
Checking the fuel mixture
Before starting the engine of the gas spit, check the availability and quality of the fuel mixture. Do not save, do not be greedy and do not be clever in this matter.
Repair or replacement of the piston group will cost you too much (sometimes up to 70% of the cost of a new tool). It is necessary to prepare the oil-fuel mixture strictly according to the instructions. Calculate its quantity from real needs.
Excess gasoline remaining after work over time loses its quality.
We diagnose a candle and a candle channel
If the quality of the fuel mixture is not in doubt, and the lawn mower stalls at start-up, then a filled candle may become the cause. Here, for repair, an ordinary candle key (probably every motorist has one) and a spare candle will do.
We twist the candle and wipe it;
Dry it thoroughly (do not calcine);
The excess fuel in the chamber is drained through the spark plug hole and dried;
We clear an old candle from a deposit by means of a file or a lady’s file;
We set a gap with a distance of 1 mm (you can check with any coin);
We return everything to its place and try to start a trimmer.
Dry the canal for at least 30-40 minutes. Otherwise, there is a risk of re-pouring a new candle.
If the candle is working, the nest where it is completely dry and the lawn mower does not want to start, we lubricate the threaded connection with gasoline. It should be slightly moistened. No matter what wonderful spark a candle gives out, there is simply nothing to light up in a dry chamber.
If the trimmer motor still does not start, a cause such as the absence of a spark due to poor contact between the spark plugs and the high-voltage wire should be excluded. If the connection is high-quality, but there is still no spark, most likely, your ignition unit has “flown”. Here you can’t do without a master, because the part is not being repaired, but sold as a complete unit.
Diagnostics of lawn mowing filters
Another reason that the gas braid stalls may be an air filter. To exclude it, try to remove the filter and start the trimmer without it. If possible, then you will have to change the air filter to a new one, or at least blow out and thoroughly clean the old one.
A gas trimmer may not start up due to contamination of the fuel filter. This is the next step in our algorithm. Here we check the condition of the filter element and, if necessary, change it with a new one. When replacing, try not to leave the suction pipe completely without a filter, this is prohibited by any operating instructions. Haste can result in repair of the engine piston group.
Breather and exhaust channel
Often, "gentle" branded lawn mowers do not start and stall due to contamination of the breather. The main function of this element is to equalize the pressure in the gas tank. If this unit becomes clogged, a vacuum is created in the tank, which prevents the fuel supply. You can fix the problem by cleaning the breather. You can use a regular needle for cleaning.
The normal operation of the braids with internal combustion engines may be impaired due to the ingress of dirt into the exhaust channel or clogging of the silencer mesh. There is such a problem on older models. You can solve the problem by traditional cleaning and removal of the anti-spark mesh.
complex causes of lawn mowing failure
If the step-by-step troubleshooting algorithm does not give a result, and your braid still does not start or stalls, it is worth examining the carburetor and the engine itself. A clogged carburetor can be one of the reasons for unstable tool operation. Three main problems can be distinguished here:
Clogged channels or jets. All this is cleaned with special washes or purged with a powerful jet of compressed air from the compressor. Do not use needles and wire, as passage sections may be damaged;
Worn carburetor gasket. Exit. replacement of a failed gasket;
Violation of tightness. To check this indicator, you can use an ordinary household tonometer, replacing a manometer with a suitable one. Keep an eye on the readings: if they do not change, everything is fine, and if the pressure starts to fall, then some part of the carburetor is faulty. We’ll have to find it and replace it with a new one.
If everything is in order with the carburetor, then the gas trimmer may not start due to wear on the piston group. If chips, scratches, or nicks are found on the piston or cylinder, they should be replaced.
Piston rings are subject to mandatory inspection. A slight piston loophole while rocking the connecting rod indicates that it is time to change the rings.
This procedure is best entrusted to service center specialists.
Rules for the operation and storage of lawn mowers
In order for the lawn mowing to continue well, you need to provide it with good storage and operating conditions:
during operation, carefully monitor the cooling system, carefully and timely clean the channels in the housing, as well as the fins of the starter;
if necessary, use solvents, kerosene and other detergents for cleaning;
do not clean the tool “hot”. let it cool;
Strictly follow the requirements of the instruction regarding the operating mode, otherwise you may overheat the engine;
if you do not plan to use the lawn mower in the next month, the fuel mixture must be drained from it, because over time it breaks up into heavy fractions that will uniquely clog the carburetor channels;
after draining the fuel, let the trimmer idle until it dies, this will help to completely remove the remains of the working mixture.
Before winter storage, follow these steps:
completely disassemble the braid, rinse and clean all the details that you can;
inspect the parts for damage, if necessary, eliminate distortions, gusts, bends and any other malfunctions;
Pour enough oil into the gearbox and clean the air filter;
you can partially disassemble the motor, flush, blow and grease all moving parts;
in order to lubricate the piston, you need to unscrew the candle, raise the piston to the dead center with the starter, pour a little oil into the spark plug hole and rotate the crankshaft a couple of times;
if you are not keeping the lawn mowing house, wind the engine with an oiled rag.
Remember, careful observance of the rules will allow you to forget that it is bad to start a lawn mow for several seasons.
Lawn Mower Poor Starts Hot
Hot engine is bad starts up
There are situations when the car does not start, after it worked, after standing just a couple of minutes. With such a problem, drivers of completely different cars face.
In the main, this happens specifically on gasoline engines.
Regardless of what the engine is running on, carbureted or with an electric control unit, there is such a problem as the engine does not start up very hot or does not start up at all for hot.
So, if you have a carburetor engine, and he badly starts on a hot. then you need to find what the problem is. There can be only two obstacles, and both of them are connected with fuel.
In the first case, obstacles can be with fuel. This often happens when the driver refuel at another gas station that he had never refueled before.
The second reason is the carburetor, or rather its settings.
The main problem, why the carburetor engine does not start on a hot one, is that the engine has a huge temperature during operation relative to the carburetor.
When the engine is started and asks for fuel from the carburetor, then everything is fine, the fuel circulates and cools the carburetor and the engine. But when it is muffled after long-term work, the engine gives its heat to the carburetor, and it heats up.
At this point, the gasoline that was pumped into the carburetor starts to evaporate, traffic jams from the air begin to form in the system, which prevent the car from starting up.
You should pay attention to the fact that if the car does not start on a hot engine, then do not try to do it. The fact is that the carburetor pumps fuel from the main tank and later, as the car cools down, there will be more fuel than necessary, and it will simply flood the candles. Then you will have to not only wait until the carburetor cools down, but also clean or change the candles.
In order to avoid this obstacle, it is necessary to impoverish the fuel mixture without the help of others. This means that the fuel consistency will now have more air than gasoline. This can be done using the accelerator pedal.
In order to deplete the fuel mixture, press the accelerator pedal. Usually it is necessary to squeeze it out on one second, but on some engines the pedal needs to be squeezed out completely.
It must be emphasized that the accelerator pedal in your car needs to be pressed only once, when you press the accelerator pedal again, the fuel will flood the candles.
The third problem, due to which it can start up poorly on the hot, in the engine, where the carburetor is responsible for the fuel injection, is that the gas pump in the tank is malfunctioning or overheated.
The problem is that previously gasoline pumps could not work at high temperatures, and during operation they often became unusable or simply turned off, which prevented the car from starting up. In this case, you just need to change the gas pump to a more modernized one.
In the near future, fuel feed pumps are already capable of operating virtually in any weather and without interruption. The cost of such pumps a little higher than a standard carburetor from a car manufacturer of the Volga.
Unfortunately, it happens that badly starts on a hot engine and such. In fact, in a car with such an engine circumstances may be even greater than in a carburetor engine. As you know, a car with an injection engine works completely in automatic mode. Because here all the work is based on the readings of different sensors.
The first and main reason why this engine does not start when it is warm is the incorrect operation of the sensor, which indicates the temperature of the cooling water.
The fact is that when the sensor indicates an incorrect temperature, the electrical unit gives an incorrect command to nozzles that inject an unnecessary dose of fuel. It often happens that the sensor is simply clogged, because of this, it does not indicate the correct temperature of the cooling water.
In this case, you just need to clean the sensor and install it back. If the sensor has become unusable, it must be replaced with a new one.
DDE WYZ20H2 gas acid, does not start hot. That the trimmer does not start on a hot one and even that the lawn mower does not start well. Repairs
Lawn mower with the Ready Start system warming up categorically refused to start.
lawn mowing. On the hot stalls. Possible cause and remedy
Immediately I draw your attention to the fact that this is not a carburetor. (My Facebook website.
2nd reason why not starts up the machine is that the fuel injectors are leaking.
In fact, everyone knows that the nozzle must supply fuel to the combustion chamber under pressure, but it will not be able to do this if the nozzle body is leaky. In this case, the mixture will be rich in fuel and poor in air.
Due to the fact that there is no air in the combustion chamber, the fuel will not be able to catch fire. In this case, it is necessary to inspect the nozzles in a special device.
If during the inspection it was found that the nozzles no longer began to be leakproof, then they must be immediately discarded and new ones installed. The problem is that even cleaning with ultrasound will not help to solve this.
A further prerequisite for the machine to not start is that the high pressure fuel pump is faulty. The problem here lies in the fuel pump high pressure. Husqvarna r 53 the lawnmower starts up poorly and “troits” on the hot start up better.
Checking this is not difficult, and even the most inexperienced driver can handle this. In order to check the performance of the plunger pair, you just need to pour cold water on the back of the high pressure fuel pump in order to cool it.
If after that the engine starts immediately, the drawback is only in the plunger pair.
In fact, when the engine that runs on diesel does not start, the drawback may not only be in the plunger pair. If the problem is on a diesel engine, then in addition to this check, you also need to check the oil seal of the drive shaft and the fuel pump bushings high pressure.
These were the main reasons why a warm car engine may not start. If all these manipulations did not help, then you should look further. But most often, drivers who are faced with this problem are helped by checking these particular key components.
One way or another, the problem here is precisely in the fuel system. In addition, it is not worth noting the fact that the fuel may be unsuitable in order to correctly ignite.
The problem with fuel is described for a carburetor engine, but an engine that is controlled by an electronic control unit may not start for exactly the same reason.
So, if these methods did not help, then you should check the following nodes and devices. First of all, after the main check, you need to check the crankshaft position sensor.
He can give the wrong signals to the electronic control unit of the car, and he will no longer be able to give the correct command to the nozzles and other actuators, the engine of the machine will not start. Like any other sensor, this one may become clogged or become unusable.
The first step is to clean it, and if this does not help, then you need to replace it with a new one.
The second thing to see is a mass air flow sensor. It is just as important as the other sensors in this car system. The mass air flow sensor may be clogged or malfunctioning. It is best to clean the sensor so that it is visually close to a new one, this is very important in order to determine if the sensor is working.
The third thing to watch when the car does not start is the fuel wire pressure regulator. As the name implies, it regulates the pressure in the pipes through which the fuel flows in the nozzles.
The fourth explanation, because of which the warm engine of the car may not start, is that the idle speed control does not work. It is needed in order to ensure the correct operation of the engine during idle.
The fifth reason is high pressure wires. It is they who conduct the electric current to the candles, which ignite the fuel mixture in gasoline engines. You can identify a faulty high-pressure wire visually. If on your wire high pressure If there are cuts, torn places and other damage, then such a wire is best replaced.
If damage is detected on one wire, then it is best to change all the wires at once. This must be done because most often the wires are installed at the same time, and if one of the wires becomes unusable, the others will also soon become unusable.
The last thing to watch is the ignition system. In order to find out that the ignition system is faulty, you need to understand the device of the car a little. If it was discovered that the malfunction is in this particular system, then it should be replaced immediately.
Often, drivers of supported cars are faced with a problem that does not start at hot engine. This can happen even after it has just worked and warmed up to operating temperature. This can happen for several reasons, for each motor machines they have their own.
Does not start a lawn mowing or starts, but stalls. What is the reason? Agrotechservice
To understand this, you need to know the principle of operation of the unit as a whole. It also happens that, just bought, a new saw does not start, and running around the service centers begins, in such cases it is recommended:
carefully read the operating instructions; to study in detail the method of first winding and running the lawn mowers; try to understand the principle of the product;
how is pumping gasoline and so on.
Causes of mowing lawn malfunctions:
the quality of gasoline is poor; the wrong proportion of gasoline and oil; clogging of the fine filter;
the spark disappeared.
lawn mowing does not start after winter
In such cases, the unit must be serviced. Remove the fuel system, including filters (air, fuel), disassemble the carburetor, clean each unit, rinse. Blow out filters with air. Pay attention to the quality and octane rating of the fuel.
It should be noted that the products of such well-known companies as STIHL, Husgvarna and other brands will not work on cheap gasoline with a low octane rating.
For them, suitable fuel from the AI-92 brand and higher from gas stations and those that are well-established, since gas stations also have bad gasoline.
The use of high-octane and high-quality gasoline will determine how long the lawn mower will be used and how long it will last.
It is necessary to take into account one more fact that during long-term storage of the diluted fuel mixture, its working qualities fall, which also leads to consequences in which the lawn mowing does not start.
Therefore, it should be diluted portionwise, that is, the amount of the mixture that is produced at a time. The operating instructions clearly describe and explain the proportion of mixing gasoline and oil.
Strict observance of the correct proportions will at least save you a few questions why the lawn mowing does not start and what to do in such cases.
the lawn mowing starts and stalls. What to do?
1. There is a spark, and everything seems to be normal, but the lawn mowing does not start; in such cases, check the air access valve in the fuel tank. Clogging of the valve leads to the creation of a vacuum in the tank, at which the carburetor loses gas, so the lawn mower will start, but then stall.
To eliminate this reason, you need to clean the valve and try to start a lawn mow with a tank cap that is not fully twisted. 2. If the lawn mowing does not start at the same time, remove and clean the fuel filter, and also check all the carburetor parts, and then try to start.
The lawn mowing does not start again, the air filter is disconnected, try to start without it, if the lawn mower starts to mean the reason in the air filter, replace it.
the lawn mowing does not start, the spark disappeared
The disappearance of a spark entails checking the contacts and the correctness of the gap between them, the conductive wires to the candle and the candle itself. A way to check the spark is to unscrew the candle, connect the wire to it, put the candle sideways to the motor cover and pull the starter several times as if starting the lawn mowing, while you need to look at the angle and the contact of the candle, a spark should run between them.
If there is no spark, take a new candle to do the same procedure, if at the same time the spark is not traced, it means the problem is in the wire or contacts, it is better to replace them.
lawn mowing does not start on a cold
When starting a cold motor, it is not recommended to press the gas. Having tilted the lawn mow so that the air filter is on top, press the fuel suction button 5-6 times, set the function lever to the "start" position, pull the starter cord several times until the engine starts. After a few seconds of motor operation, turn off the start system.
lawn mowing doesn’t start on hot
If the lawn mower was recently in operation and has not yet had time to cool down but does not want to start, press the gas trigger, pull the starter cord sharply several times until the engine starts and only then release the gas trigger. If a lot of time has passed and the lawn mowing has managed to cool, then it is necessary to start it as if it were cold. If the above methods did not help, the lawn mowing did not start, then you should contact a service center.
The increased fuel consumption and the rapid formation of carbon deposits on the lawn mowing candles when using a properly prepared fuel mixture indicate the need for carburetor adjustment. This describes how to set trimmers with carburetors that have one screw for adjusting the fuel supply.
Flush the air filter before adjusting the carburetor. It is recommended to rinse it after every 10 hours of operation. After that, you can begin to adjust. The example photograph shows the carburetor of the gasoline trimmer PRORAB-8406. The numbers indicate the adjusting screws that we will use.
PRORAB-8406 gas trimmer carburetor adjusting screws
Purpose of adjusting screws:
Fuel mixture adjusting screw.
Idle adjustment screw.
The screw limits the maximum speed.
Start the lawn mower and wait until it warms up.
Start slowly turning the fuel mixture adjusting screw until the engine stalls or stalls unless you catch the moment. After that, unscrew the screw a quarter of a turn if the engine is not dead, or half a turn if it is dead. Start the stalled engine. Check, by opening the throttle, how the engine accelerates. Continue to unscrew screw No. 1 a quarter of a turn until the engine starts to confidently gain increased speed when it is progazovaniya. This will be the moment of the most economical stable engine operation. At the PRORAB-8406 gas trimmer, the adjusting screws are turned clockwise, unscrewed. counterclockwise, for some other brands the lawn mowing may be vice versa.
We proceed to adjust the low speed. Screw number 2 restricts the return movement of the throttle lever. by wrapping it, we increase idle speed, unscrewing. reduce it. Adjust so that the engine runs confidently at low speeds and even slightly faster (for a better start), but so that the reel with fishing line or knife does not rotate, and before starting to rotate, there is a sufficient margin of speed. If the engine starts poorly, still increase idle speed.
Maximum speed limit
After adjusting the flow of the fuel mixture and low revs, check how the lawn mowing engine will operate at maximum speed. If necessary, limit the maximum speed to the required level using the No. 3 hollow screw. Loosen the locking nut and screw in to decrease the maximum speed or unscrew to increase. After adjusting, tighten the nut. Setting the maximum speed is necessary to protect the trimmer motor from overheating and the ability to use the release key lock to reduce fatigue of the right hand.
Video: Stihl Trimmer Does Not Run At Low Speed
In the future, it may be necessary to adjust the trimmer carburetor. For example, if the engine, when operating at full load, starts to pick up poorly, loosen screw No. 1 by another quarter of a turn. If it is difficult to start, increase the idle speed. Weather conditions and the quality of the fuel mixture can affect the operation of lawn mowers. The vibration can even make the adjusting screws rotate.
The spring may interfere
My first attempt to adjust the carburetor of the lawn mowers did not work, as the spring of the fuel mixture adjustment screw prevented it. The factory spring turned out to be too thick in a compressed state and did not give the opportunity to reduce the fuel supply to the required level. I had to pick up another spring and continue adjusting after replacing it.
Spring mixture adjustment screw
In the photo above, the factory spring, below the adjustment screw with a selected spring. I am writing about this, because I’m not sure that this is an isolated case, and someone else may encounter the same situation.
From personal experience
lawn mowing or trimmer
A trimmer is a broader concept than a lawn mow (lawn mow), as it can also be electric. A gas trimmer and a lawn mower are one and the same.
Some authors claim that the trimmer is a weaker tool, in contrast to the more powerful lawn mowers, which can be used to mow shrubs. Personally, I have a tool with a maximum power of 1.7 kW and capable of mowing a small shrub up to 10 mm thick, as stated in the instructions. The user manual is called "Petrol trimmer.".
Fuel mix ratio
I read somewhere that if in the instruction manual for lawn mowers and on the canister with oil different proportions of the preparation of the fuel mixture are indicated, the proportion indicated in the manual should be used.
This has been the case for a long time. excess oil flowed from the engine to the gas tank and soot was constantly forming on the candle, since the manual indicated the proportion for the engine being run in 1:25, and on the canister. 1:50. After the transition to a proportion of 1:50, the appearance of oil drips stopped. The candle continued to burn, but with less intensity (the carburetor was not yet adjusted).
Until now, some users of gasoline tools determine the proportion of the fuel mixture “by eye”. If during the preparation of the mixture the amount of oil is underestimated, after some time an extraneous sound may appear immediately after the engine starts, gradually disappearing during warming up, and the engine stops with a sharp jerk. Continued operation of the trimmer in this mode will lead to its failure.
In the worst times of working with a trimmer with an unregulated carburetor, the engine stopped starting after using each fuel tank. And only after cleaning the candles from soot could we continue to work.
To clean the electrodes, fine sandpaper was used, and to clean the space between the insulator and the case, a thin clerical clip with a bent end was used. First, the electrodes were wiped from a large dirt with rags, then they were cleaned with sandpaper. After that, the candle was lowered into diesel fuel and the moistened soot was scraped off with a paper clip from the surfaces of the insulator, the inside of the housing and between them. Next, the candle was lowered several times in diesel fuel, which was then shaken off with the dirt. Sometimes the cleaning procedure with a paper clip and rinsing were repeated. After that, the candle was wiped dry and was ready for further use.
Incredibly, one tank of the fuel mixture with an unregulated carburetor can be consumed in less than 10 minutes. it was tested in practice when the trimmer was started and operated at high speeds with maximum fuel supply (the adjusting screw was unscrewed much more than normal).
Chainsaw owners sometimes have to deal with the fact that the saw, for no apparent reason, stops working normally. To understand why the chainsaw stalls under various operating modes, and also describe how to diagnose a malfunction, we will try in our article.
Why chainsaw stalls when heated
The situation in which a chainsaw starts up in the cold, and during heating can stall, is familiar to many who deal with them. The main reasons for this saw behavior are as follows.
Faulty ignition module (coil). You can determine the malfunction by checking the spark first on a cold engine, and then on a hot one. If there is no spark on a hot engine, then you should try to fix the problem by replacing the ignition coil.
The chainsaw carburetor has the wrong setting (pours a candle on a hot one). You can identify the problem by the way the saw starts up in the cold. If it is not necessary to close the air damper for a cold start, and the engine starts without a preliminary flash, then the fuel mixture is not formed correctly and after heating the engine, the fuel fills the candle and makes starting impossible. The problem is fixed by adjusting the carburetor.
Defective spark plug. In such a situation, similarly to a faulty ignition coil, a spark disappears when the engine is heated. It is worth trying to replace the spark plug with a new one, and if this does not help, then you need to check the ignition coil and the gap between it and the flywheel.
You can check the ignition coil with a multimeter or by replacing it with a known working one. The multimeter checks the primary and secondary windings in the resistance measurement mode. The resistance index of the primary winding, the working coil, is 1 kOhm. secondary 4 kOhm.
Why the chainsaw stalls under load
In some cases, the chainsaw under load is unable to work normally and simply stalls. A common reason for this behavior is incorrect carburetor adjustment, or air leaks through the crankshaft oil seals or carburetor gasket. And also this behavior can occur due to leaking carburetor.
Diagnose the cause and eliminate the fact that the chainsaw starts and stalls under load, it is best in the service center, because a special tool is needed to check the tightness of the carburetor and crankcase.
The saw, unable to work under load, will also hesitate to maintain idle speed. They will "swim." Diagnostics begins with a leak test of the crankcase and carburetor. If air leakage is detected through the crankshaft oil seals, they must be replaced. If air leakage is detected in the carburetor, the cause can be eliminated by installing a repair gasket kit.
Only after the above actions have failed and the engine crankcase with the carburetor are tight, you can proceed to adjust the carburetor.
The reason for this algorithm is as follows: if the air intake from the crankcase has not been eliminated, and the carburetor has simply been adjusted before the engine is operating normally, the fuel mixture will contain more fuel than is required for a sealed crankcase, which in turn will significantly increase its consumption. Also, most likely, carbon deposits will appear in the engine, which will also adversely affect the further operation of the chainsaw.
In some models of chainsaws, to ensure the operation of the fuel pump, special hoses are installed that transmit air impulse from the crankcase to the carburetor fuel pump. If this hose is frayed, the saw will idle and will not work under load at all.
Video: Husqvarna 137 Is Not Gaining Speed
Owners of household chainsaws HUSQVARNA 137 and HUSQVARNA 142 for any abnormal engine operation should first check the impulse hose, since this is considered the most common cause of breakdown of these chainsaws.
A video showing how to replace a defective impulse hose with your own hands on a HUSQVARNA 142 chainsaw can be seen below. It steps through the process of disassembling the saw, shows the impulse hose and stipulates the consequences of its malfunctioning HUSQVARNA 142.
Why the chainsaw is not gaining momentum and stalls
If the chainsaw, one minute after start-up, is not capable of gaining speed or stalls when the trigger is pulled, the carburetor or engine crankcase is most likely leaky. As in the previous case, the problem can be solved by checking for leaks and adjusting the carburetor.
If the chainsaw does not gain momentum and stalls after it has worked normally for about 5 minutes, the cause may be a defective fuel tank breather. The vacuum created in the fuel tank during the operation of the tool does not allow the engine to receive the necessary amount of fuel for its normal operation, and for this reason it will be unable to gain speed or stall. At the same time, if you stop the tool, open and close the fuel tank cap and start the chainsaw again, the tool will again work normally for about five minutes, after which it will stop gaining speed or stall.
The reason that the chainsaw is not gaining momentum may be excessive soot in the muffler, which makes it difficult to exhaust the exhaust gas, thereby reducing engine power and speed.
If you wish, you need to check the tightness of the crankcase, but the lack of a special tool, you can use the following test procedure.
Crankcase leak check algorithm
Remove the side cover and tire from the chainsaw.
Unscrew the spark plug and lay the cord with the knots in the cylinder through the spark plug hole, thereby blocking the movement of the piston and crankshaft.
As a lace with knots, you can use the old cord from the starter, having tied knots on it after 3-5 cm.
Unscrew the drive sprocket for the chainsaw.
Remove the oil pump cover and the pump itself.
Remove the starter from the chainsaw.
Unscrew and remove the flywheel.
Remove the carburetor.
Using a syringe, pour gasoline into the crankcase through the hole for the carburetor in the cylinder, while observing the crankshaft oil seals. If gasoline flows through them, then the oil seals have become unusable and must be replaced with new ones.
It is better to entrust the installation of oil seals to professionals.
An indirect sign of crankcase leaks are oil smudges in the oil seal area.
Why the chainsaw starts and immediately stalls
The chainsaw starts and stalls immediately, the reason for this behavior may be hidden in the carburetor. A malfunction of the fuel pump or a malfunction of the main fuel jet can cause this behavior of the saw. The inability to operate the chainsaw after startup requires a complete diagnosis at the service center.
All of the above options for improper engine operation have similar causes, which, depending on their neglect, can have different manifestations. For example, with a slight suction of air into the engine crankcase, its operation will not change much, the engine power will drop slightly, its maximum speed will increase, and it will be able to warm up a bit more. In the middle stages of air leakage, the engine will stop idling and will become very hot during operation. A strong suction of air will make the saw impossible to work, it will start and immediately stall.
In parallel with the visible manifestations of malfunctions, for example, the inoperability of the chainsaw after starting, inside the engine at the time of its malfunction, there will be processes that irreversibly lead the saw to the most serious consequences, for example, fusion of the piston, jamming of the crankshaft.
Failures leading to malfunction of the chainsaw
There are a number of malfunctions that must be taken into account in the diagnosis, because they can lead to interruptions in the saw.
Worn crankshaft bearings. With worn crankshaft bearings, a beating on the main shaft where the flywheel is mounted is inevitable. In such a situation, it is impossible to adjust the gap between the flywheel and the ignition coil, which entails interruptions in spark formation, and unstable operation of the chainsaw.
Impulse channel pollution. The pulse channel serves to ensure the operation of the fuel pump; accordingly, its pollution leads to improper operation of the pump, which will make the saw impossible to work (it will start and immediately stall).
CPG wear. As a rule, with increased wear of the CPG, a decrease in compression in the chainsaw engine is observed, which will necessarily affect its ability to develop speed.
Pollution of fuel and air filters.
When the first signs of malfunction of the chainsaw appear, it is worthwhile to conduct a complete diagnosis. In order to avoid damage to the saw due to improper maintenance, it is better to entrust the work to identify and troubleshoot engine malfunctions to professionals. And most importantly, you do not need to use a chainsaw with minor defects, because this will lead to even greater problems.
Angle grinder, which is popularly called the angle grinder, is a universal tool with which you can perform a list of works: cutting, grinding, cleaning metal, wood, stone and other materials. This tool has found its application in industry. It is ideal for both professional repair work and household chores.
Now on the market there are a large number of different models of angle grinders designed for home or professional use. The latest angle grinder with speed control is equipped with special nozzles of any size, characterized by the presence of descent safety locks and additional functions. With all the variety of models and sizes, an angle grinder has a common task, which is to facilitate the person’s workflow as much as possible and save time.
Which angle grinder to choose? Household and professional tools
When buying an angle grinder, you should take into account such indicators as rotation speed, power, the presence of additional functions and disk sizes.
Indispensable in everyday life are angle grinders. This is a conventional angle grinder, which are compact in size and demanding on the operating mode. After 10-15 minutes of operation, the owner of a conventional grinding machine is forced to take a mandatory break to prevent its overheating. The household angle grinder is not designed for daily use. Their technical indicators are much lower than that of professional devices that can be used for a long time without fear of overheating. In addition, professional angle grinders are equipped with brass inserts and a metal housing. This is due to the fact that they have to be used in extreme conditions: laying pipelines, earthwork, etc. For such an environment requires a tool that is as much as possible protected from dust and moisture.
Universal angle grinders
Universal are considered an angle grinder with speed control. These machines are ideal for jobs such as cutting, grinding and polishing any materials.
angle grinder with speed control and soft start are mainly used in those cases when it is necessary to polish stone or wooden surfaces. This is due to the structural features of these materials, the processing of which at high speeds is undesirable, as it leads to the destruction of the surface and rapid wear of the nozzles.
The best manufacturers of grinders
Angle grinders are produced by domestic and foreign companies. High results were achieved by the German manufacturer Bosch, Japanese Hitachi and Makita. Mostly they produce models for professional use: an angle grinder with speed control, power exceeding 1200 W, and various disk diameters. Angle grinders make it possible to carry out any kind of complex work. Using special diamond blades, it is possible to cut concrete and stone, to cook walls under wire. The presence of an additional side handle provides control over a powerful power tool during its operation.
Bosch: Model GWS 850 CE
The Bosch angle grinder with speed control and an output of 850 watts is ideal for grinding with diamond cups in natural and artificial stone. This angle grinder is one of the most popular electronic tools in the work of professional stonecutters, who every day are faced with the need to polish in places where granite or marble are cut. This angle grinder is lightweight, which greatly facilitates operation: the master can hold it with one hand.
The Bosch GWS 850 CE angle grinder with speed control is warranted for one year of professional use.
You can adjust the grinding speed using six positions. The rotation speed range of grinding nozzles and discs is from 2,800 to 11,000 rpm.
The quality of polishing directly depends on the speed of rotation of the nozzles. The smaller it is, the higher the quality of work. This requirement applies to granite, marble, glass and other surfaces that can be operated with a grinding tool equipped with an adjustment function. To work with marble surfaces, experts recommend a choice of speed at which the grinder produces 2800 revolutions. Wooden surfaces can be treated with special nozzles at the highest speeds. The maximum speed for this angle grinder is 11,000 revolutions.
Video: Makita 125 Angle Grinder Variable Speed
Bosch GWS 850 CE comes with a key, handle and two mounting washers for discs and nozzles.
Nozzles for polishing work
The quality of polishing work depends on the adjustable speed and correctly selected nozzles. For grinding marble and granite surfaces by experienced engravers who work with stone professionally, flexible diamond blades are recommended. For wood, an emery petal circle is suitable. For polishing metal products and surfaces, it is best to use circles containing felt or felt, which is attached to the nozzles with a special Velcro. Felt nozzles are also suitable for polishing glass. But in this case, you need to purchase a special diamond paste. Painted or varnished surfaces must be treated with lamb wool tips.
Household Makita GA5030 angle grinder
Makita angle grinder with speed control is considered one of the best models of household angle grinders. Its price is 2500 rubles. The Makita GA5030 has a low weight that does not exceed 1.8 kg, which is an advantage of this tool compared to other similar models in this price category.
Professional Angle Grinder Makita 9565Cv
Angle grinder Makita angle grinder 125 mm speed control provides the implementation of any kind of work at speeds from 2800 to 11000 rpm. Makita 9565Cv requires a 125 mm diameter drive and 220 volt power. Power Consumption Angle Grinder. 1400 watts. 125 mm angle grinder with speed control 9565Cv is a professional power tool, the design of which contains:
adjustment of rotation speed, which makes it possible to optimize the operating mode. The spindle receives a certain speed necessary for a specific task: cutting, grinding or grinding;
power button lock. This is important to ensure safety during operation, especially in cases of unplanned power outages (turning off the light, pulling the plug out of the socket). Thanks to the secondary start-up fuse, the owner of the Makita 9565Cv is protected against arbitrary switching on the angle grinder and does not risk injury;
speed stabilization system, which, due to changes in disk loads, facilitates the process of working with massive labor-intensive parts;
two-position side handle, which ensures reliable holding of the power tool during operation. A convenient version of the handle performs an anti-vibration function.
9565Cv angle grinder is an angle grinder "Makita" 125 with speed control and smooth descent, due to which the power tool is protected from critical overloads when turned on. A soft start protects the angle grinder system and the numerous parts contained in it (disk, winding, engine brushes) from a strong power surge. Turnovers are typed smoothly, the angle grinder does not tremble in the hands.
How to choose the required disk size?
For angle grinders, discs with a diameter of 115 to 230 mm are intended. Working is the part that extends beyond the apparatus. Nozzles tend to wear off during use. Disks with a diameter of 115 mm quickly wear out and are suitable for cutting products with a thickness of not more than 3 cm. over, this diameter is unsuitable for working in hard-to-reach places. For such operations, 180-230 mm discs are better suited.
Metabo WEV 10-125 Quick
This is another angle grinder with speed control. 125 mm is considered the optimum disk size for the Metabo WEV 10-125 Quick. Among all the well-known 125-mm angle grinders, this model is considered the best in terms of power. It features a wide range of adjustment of spindle speeds and a constant speed under the influence of a variable load. This is ensured by built-in electronics, which protects the engine from the overload grinder and produces a smooth start of the system. The angle grinder has an automatic safety clutch and corner brushes that turn off if voltage suddenly drops. This is important for safety during operation of a powerful angle grinder.
The ergonomic shape of the model, the presence of a removable handle in its design, which allows it to be installed on either side, the ease of replacing carbon brushes are advantages for Hitachi G13SS that many users have already appreciated.
What to consider when buying?
If you want to purchase an angle grinder, you need to get acquainted with the technical indicators of the model you like. Best of all, if there is a soft start. This will protect the owner of the angle grinder from possible jerks when turning on the power tool and from knocking out fuses. The problem of increasing the load on the system of an angle grinder can occur when the speed is reduced. In such cases, overheating occurs. It is desirable that the angle grinder be equipped with modern sensors that regulate the speed of revolutions during overload and overheating. The more complex the model system, the higher its class and the more expensive it is. At the same time, more and the amount of work that can be done using expensive power tools.
The electric jigsaw is an electric saw, which is an indispensable thing in every home. With this tool you can saw metal structures, wooden objects, plastic and tiles. Unlike a standard saw, a jigsaw can be cut the most intricate figures. circles, triangles, stars, in general, almost everything you can imagine. However, with such extensive capabilities, a problem often arises in the smooth running of the jigsaw, so that the resulting lines correspond to the planned ones. How to evenly saw with a jigsaw? We will help you figure this out.
In order to start work, it is necessary to carry out preliminary activities and prepare:
material to be processed;
clamps guiding the roulette wheel;
The sawing process is as follows:
Strengthening the source material. In our example, the source material is a tree. A prepared wood sample and a guide, the role of which can be played by a regular flat rail, should fit between two clamps. The sample is placed on a certain elevation, so that the jigsaw could not rest in the process of cutting. After that, using a tape measure, you need to accurately measure the desired width of the product, which should turn out, and draw a cut line with a pencil. Then lay the guide to the desired distance from the line and secure with clamps. A jigsaw set with a file in the direction of the marked line with the guide is also fixed with a clamp. You need to fix it well, but do not overdo it. The same thing is done on the other side.
Cut. Turn on the jigsaw and get started. Proper use of the device does not imply an extreme pressure on it, which can provoke rapid heating of the product and damage. It is also not worthwhile to use the same file for a long time, because it dulls very quickly. If a tree of very hard rock is selected as the starting material, then you can pre-lubricate the surface with machine oil. It will be easier for the saw to slide, the cut will become smoother, and the jigsaw will last longer.
Some features of the process
You must first select the right file for a jigsaw. A variety of files allows you to focus on the option that will correspond to both the material of the original workpiece and the final desired result.
Video: At What Speed Saw a Tabletop with a Jigsaw
In general, a jigsaw can be with a pendulum and with the usual move. In the second version, for a smooth cut, the blade needs to be moved clearly vertically, cutting the material upward. Due to the high speed created, the web wears out more slowly.
When working with a pendulum tool, the principle is essentially the same, only the preferred material for processing is soft wood or plastic, difficulties may arise with steel.
In order to make a direct cut, it is necessary to choose a wide blade, it is better if the jigsaw has the “Soft start” function, which will allow to avoid sudden movements precisely at the initial stage. If you need to cut a round hole, you first need to drill the original version, into which the necessary file is introduced. The cut itself is carried out according to the marking. If the original version cannot be cut, then it is required cutting method. To do this, the jigsaw tilts at an angle until it comes into contact with the material, this allows you to make a through hole, after which you can already do the marking on the marking.
If you need frequent circular sawing, it is advisable to purchase an additional device called a circular cutter.
It is allowed to cut along the edge of the workpiece, but it is necessary to make sure of its initial evenness, without this the jigsaw is sawing crookedly. If the edge is uneven, then only correct marking can fix this.
When working with wood sheets of small thickness, there is a risk of chips. To prevent this, place the sheet face down.
For smooth sawing of panels there are special devices, the so-called machines. They can be vertical or horizontal.
The names speak for themselves. In the first case, the panels are installed vertically, the beam installed on the guides, acts as a bracket. The possibility of its rotation to a right angle allows you to saw off the material in any plane. The horizontal version assumes the presence of a table for sawing, the mechanism itself and the carriage, ensuring the movement of the file along.
Rules for flat cutting
Thus, in order to correctly and evenly make a cut, you must adhere to the following rules:
Carefully choose a file that is suitable for your source material.
Prepare all necessary supporting items.
Carefully fasten the workpiece.
Take into account the correct location of the workpiece so that it does not have to correct flaws. in some cases, the canvas is placed face down.
Work out the device control technique with the help of professionals or through a training video.
Carefully observe safety precautions.
In fact, processing products with a jigsaw is not such a difficult task, which any beginner joiner can do. Even if an even and accurate saw cut does not work right away, do not despair: you need to soberly assess what nuances you may have not paid attention to. And do not ignore the advice of professionals who can speed up the process of mastering art, how to saw with a jigsaw, and discover some secrets. Try and improve!
Do-it-yourself generator from an asynchronous motor. How to convert an induction motor into a generator
Making a generator out of an asynchronous motor with your own hands is not difficult, but you will have to try and spend some money on the purchase of components. But for the work you need to know some subtleties. In particular, the operating principles of an asynchronous AC motor, to study the basic elements of its design. The main thing in generator sets is the movement of the magnetic field. It can be provided by rotating the armature using an internal combustion engine or a wind turbine. It is also possible to use alternative sources. the strength of water, steam, etc.
Induction motor design
You can select just a few elements:
Stator with a winding.
Front and rear covers with bearings installed.
Squirrel cage rotor.
Contacts for connecting to the electrical network.
If you think about it, it may seem that it is very simple to remake the engine into a generator, a photo of which you can examine in detail. But if you look more carefully, it turns out that not everything is so simple, there are plenty of pitfalls.
The stator consists of many metal plates pressed tightly to each other. They are also varnished, in some designs, to give strength, all plates are welded to each other. A wire is wound around the stator, it fits snugly to the core and is isolated from it with cardboard inserts. Bearings are located in the covers, with their help not only the rotor is rotated more easily, but also its centering.
Engine operating principle
The essence of the whole process is that a magnetic field is formed around the stator winding. It is powerful enough, but lacks the main component. the movement. The field is static, motionless, and the main condition in generator sets is rotation, a change in the direction of the lines of force. In the case of the engine, everything is quite simple. there is a rotor, which is made of metal. Inside are several turns of a very thick cable. over, all turns are closed, interconnected.
It turns out the principle of a simple transformer. In short-circuited turns, an EMF is induced, which creates an alternating magnetic field in the surrounding space. It turns out that now everything is there in order for the movement to appear. Under the influence of forces, the rotor of the electric motor rotates. This type of machine has good characteristics, and the design is simple and reliable, there is nothing to break. For this reason, induction motors are widely used in industry. than 95% of all motors in factories are asynchronous. Everyone can make a generator with their own hands, the circuit of which is not very complicated, with minimal knowledge.
Connection to a single-phase network
The true problem is connecting a three-phase electric motor to one. The principle of the generator is slightly different, but to understand it you need to consider the process of the motor. It is necessary to use a tank that will allow you to make a phase shift in the right direction. over, there are several schemes used in practice. In some, the capacitor is used only at the time of startup, in others and during operation. The starting capacity is turned on for a short period of time, until the required speed is reached. It contacts through a switch parallel to one of the windings connected by a triangle circuit.
Such connection options have one significant drawback. a decrease in electric motor power. You can get from him as a maximum 50 percent return. Therefore, with a motor power of 1.5 kW, in the case of power from a single-phase network, you can only get half. 0.75 kW. This imposes certain inconveniences, since it is necessary to use more powerful electric motors.
How to get three phases from one
For more convenient use of electric induction motors, three-phase power is required. But not everyone can conduct such a network to their home, and there are also difficulties with electricity. Therefore, you have to get out, as it turns out. The easiest way to install a frequency converter. But its cost is high, not everyone is able to allocate such an amount for their own garage or workshop. Therefore, you have to use improvised means. You will need an induction motor, capacitor and autotransformer. As the latter, you can use a homemade device made from the core of an electric motor. You can even make a generator drawing to simplify the assembly work.
About 400 turns of wire are required to be wound on it. Its diameter is about 6 square meters. mm For accuracy, ten taps are required to make phase adjustments. You can even say that this is a self-made generator made of an asynchronous motor. Only its main function is transformation, phase shift. One winding is connected to the phase, a capacitor is connected between the other two. The second winding is connected to zero, the third is connected there, only through an autotransformer. Its average output is one phase, the other two are the conclusions of the outlet.
What to consider for conversion to a generator
To make a wind generator out of an (asynchronous!) Motor, you need to consider one main feature. Namely, to create a magnetic field that will make a movement. There are two ways to achieve this. The first is the installation of permanent magnets on the rotor. The second is to make the field winding at anchor. Both methods have both advantages and disadvantages.
You need to decide before starting work what type of current generator you need. If you need a constant, then you need to use diodes for rectification. This will provide light to a small house, as well as power almost any household equipment. Homemade current generators can even be driven by wind. It is only necessary to calculate the windings so that the output does not exceed the voltage. Although stabilization can be done by using the regulators used in automotive technology.
Permanent magnets or field winding?
As mentioned earlier, you can make an excitation winding or carry out the installation of permanent magnets. The disadvantage of the latter method is the high cost of magnets. And the minus of the first is the need to use a brush assembly to provide power. He needs care and timely replacement. The reason is friction, which gradually eats up the surface of the graphite brush. Any car generator, the instructions of which are always attached, has just such a drawback.
To make the field winding, it is enough to change the design of the armature. It should be metal, a wire in varnish insulation must be wound on it. It will also be necessary to establish contacts on one edge of the rotor that are used for power supply. But the plus is that it is possible to stabilize the voltage at the output of the generator. It will be easier to make anchors in the anchor for mounting niode magnets. They create a very strong field, which is enough to generate large values of voltage and current.
How many phases do you need to output?
The easiest way, of course, is to make a generator, the photo of which is shown if the output should be only one phase. But there is a snag. not every design allows this. A home-made generator from an induction motor of this type can be made if all the windings are brought out and not interconnected. Many models of motors have only three outputs, the rest are already connected internally, so to implement the idea you need to completely disassemble it and bring the necessary wires out.
Then they are connected in series and a single-phase voltage can be obtained at the output. But if you need a three-phase, it does not cost to do anything, modernization of the windings is not required. But you still need to take into account the features. It is necessary that a generator made of an asynchronous motor, made by oneself, have a connection of windings according to the star scheme. Here is a slight difference from the option when the machine works as source of movement. Efficient power generation is only possible when the star is turned on.
How to rectify the current?
But if there is a need for direct current, you will need knowledge of circuitry. Need 12 or 24 volts voltage? Nothing is simpler; automotive electronics come to the rescue. But only if the field winding is used as a magnetic field generator. When using permanent magnets, the stabilization procedure is complicated.
The rectifier option is selected based on the number of phases at the generator output. If there is one, then a bridge circuit is sufficient, or even on a single diode (a half-wave rectifier). If there are three phases at the output, then there will be a need to use six semiconductors for rectification. Also, three pieces (one for each phase). to protect against reverse voltage.
How to make one phase out of three
This action does not need to be carried out, since it is simply meaningless. If the generator generates a three-phase alternating voltage, then to power consumers (TV, incandescent lamps, refrigerators, etc.), it is necessary to use only one output. The second is the common, connection point of the windings. As mentioned earlier, it is required to connect them in a star pattern.
Therefore, you have the opportunity to connect consumers to one of the phases. The question is, does it make sense, is it rational to do so? If it is necessary to provide the house exclusively with light, you do not plan to connect any consumers, then it is more reasonable to use low-power LED lamps. They consume a small amount of electricity, so the current generator, which delivers stably 12 Volts, is able to provide the house not only with light. You can easily turn on household appliances that require just such voltage to work.
Wire winding rules
Such information is not always needed, since, in order to simplify the design, the stator winding that is already available is used. But she does not always satisfy the conditions that confront you. For example, if you are constructing a wind generator from a (asynchronous) motor, it is not possible to obtain a minimum number of rotor revolutions. Therefore, the output voltage will be small and insufficient for the operation of household appliances. Therefore, there is a need for small alterations.
The winding must be carried out with a thicker wire in order to obtain a higher value of the output current. To do this, get rid of the old wire. The winding is close to the cardboard frame. When it is carried out, it is required to apply a layer of varnish, soak the wire with it. Just do not forget to dry thoroughly before using the device. To do this, install a 25 or 40 W incandescent lamp in the middle of the stator and leave it for 1-2 days. Do not leave unattended only.
Experimental determination of the required number of turns
To determine how many turns you need for normal operation of the generator, you will need to use many formulas. But you need to know the cross section of the core, the material from which it is made. But this is often simply impossible to determine. Therefore, you have to do experiments. Depending on whether one or three phases you need, the algorithm of the experiment changes. A home-made generator from an induction motor can be made by various methods.
If you plan to make one phase at the output, then reel 10-20 turns of wire evenly around the entire core. Assemble the entire structure and connect to the drive that you will use in the future. Measure the output voltage, divide by the number of turns that are wound. And you get the voltage taken from one turn. To calculate the length of the winding, you need to apply a simple calculation. divide the voltage (necessary) by the obtained value. The calculation of a three-phase generator is carried out similarly.
Making a generator from an asynchronous motor with your own hands is not difficult. The most important thing is to decide which drive you plan to use. If this is a regular gasoline engine, then no problems will arise. Great difficulties will arise if you use a windmill as a drive. The reason is the engine speed, as well as the output voltage, are directly dependent on the strength of the wind, its speed. Therefore, such generators must be calculated in such a way that even at minimum speed, a rated voltage is generated. But at the output it is desirable to have no more than 12 volts. This will prove to be a simpler solution.
Home-made generator from an asynchronous electric motor
In an effort to obtain autonomous sources of electricity, experts have found a way to remake a three-phase asynchronous AC motor into a generator with their own hands. This method has several advantages and individual disadvantages.
Appearance of an induction motor
The section shows the main elements:
cast iron housing with radiator fins for efficient cooling;
the case of a squirrel-cage rotor with fishing line shear magnetic field relative to its axis;
switching contact group in the box (boron), for switching stator windings into star or delta circuits and connecting power wires;
dense strings of copper wires of the stator winding;
steel rotor shaft with groove for securing the pulley with a wedge-shaped key.
A detailed disassembly of the induction motor with an indication of all the details is shown in the figure below.
Detailed disassembly of the induction motor
Advantages of generators converted from asynchronous motors:
ease of assembly of the circuit, the ability not to disassemble the electric motor, not to rewind the windings;
the possibility of rotation of the electric current generator by a wind or hydraulic turbine;
a generator from an induction motor is widely used in motor-generator systems to convert a single-phase 220V AC network into a three-phase network with a voltage of 380V.
the possibility of using a generator, in the field spinning it from internal combustion engines.
As a drawback, it is possible to note the complexity of calculating the capacitance of capacitors connected to the windings, in fact, this is done experimentally.
Therefore, it is difficult to achieve the maximum power of such a generator, there are difficulties with the power supply of electrical installations, which are of great importance inrush current, on circular saws with three-phase AC motors, concrete mixers and other electrical installations.
The principle of operation of the generator
The operation of such a generator is based on the principle of reversibility: "any electrical installation that converts electrical energy into mechanical energy can do the opposite process." The principle of operation of the generators is used, the rotation of the rotor causes EMF and the appearance of an electric current in the stator windings.
Based on this theory, it is obvious that an induction motor can be converted into an electric generator. In order to consciously carry out the reconstruction, it is necessary to understand how the generation process occurs and what is required for this. All motors driven by AC power are considered asynchronous. The stator field moves slightly ahead of the magnetic field of the rotor, pulling it along in the direction of rotation.
In order to obtain the reverse process, generation, the rotor field must be ahead of the motion of the stator magnetic field, in the ideal case, rotate in the opposite direction. This is achieved by including a large capacitor in the power supply network, and groups of capacitors are used to increase the capacity. The capacitor unit is charged, accumulating magnetic energy (an element of the reactive component of alternating current). The capacitor charge is in phase opposite to the current source of the electric motor, so the rotation of the rotor begins to slow down, the stator winding generates a current.
This principle of operation is used practically in electric locomotives, trams, if necessary, smooth braking. By the same principle, some “Kulibins” slow down the rotation of the disk of electric meters, trying to reduce the cost of electricity.
How to practically convert an induction motor into a generator with your own hands?
To connect the capacitors, it is necessary to unscrew the upper boron cover (box), where the contact group is located, switching the contacts of the stator windings and the power wires of the induction motor are connected.
Open boron with contact group
Stator windings can be connected in a "Star" or "Triangle" circuit.
Star and Triangle switching schemes
On the nameplate or in the product passport the possible connection diagrams and motor parameters for various connections are shown. It is indicated:
number of revolutions per minute;
Efficiency and other parameters.
Engine parameters indicated on the nameplate
In a three-phase generator made of an asynchronous electric motor, which they do with their own hands, the capacitors are connected in the same way as a "Triangle" or "Star".
The inclusion option with the "Star" provides a starting process for generating current at lower speeds than when connecting the circuit to the "Triangle". In this case, the voltage at the output of the generator will be slightly lower. Connection according to the "Triangle" scheme provides a slight increase in the output voltage, but requires a higher speed when starting the generator. In a single-phase asynchronous electric motor, one phase-shifting capacitor is connected.
The connection diagram of the capacitors on the generator in the "Triangle"
The capacitors of the KBG-MN model are used, or other brands of at least 400 V non-polar, bipolar electrolytic models are not suitable in this case.
What does the KBG-MN brand capacitor look like
Since in everyday conditions it is practically impossible to calculate the required capacitance of the capacitors for the engine used, a table was compiled experimentally.
Calculation of capacitance for the used engine
In synchronous generators, the generation process is excited on the armature windings from the current source. 90% of induction motors have squirrel-cage rotors, without winding, the excitation is created by the residual static charge in the rotor. It is enough to create an EMF at the initial stage of rotation, which induces current, and recharges the capacitors through the stator windings. Further recharging is already coming from the generated current, the generation process will be continuous while the rotor rotates.
It is recommended to install the load connecting machine to the generator, sockets and capacitors in a separate closed panel. Connect the connecting wires from the boron generator to the shield in a separate insulated cable.
Even when the generator is not working, it is necessary to avoid touching the terminals of the capacitors of the sockets. The charge accumulated by the capacitor remains for a long time and can cause an electric shock. Ground the chassis of all units, motor, generator, control panel.
Installation of the motor-generator system
When installing a generator with a do-it-yourself motor, it should be borne in mind that the indicated number of nominal revolutions of the used asynchronous idle motor is greater.
Belt drive motor generator circuit
On an engine of 900 rpm, when idling, it will be 1230 rpm, in order to get sufficient power at the output of the generator converted from this engine, you need to have 10% more idle speed:
1230 10% = 1353 rpm.
Belt drive is calculated by the formula:
Vg. the required rotation speed of the generator 1353 rpm;
Vm. motor rotation speed of 1200 rpm;
Dm. pulley diameter on the motor 15 cm;
Dg. pulley diameter on the generator.
Having a 1200 rpm motor where the pulley is Ø 15 cm, it remains to calculate only Dg. the pulley diameter on the generator.
Dg = Vm x Dm / Vg = 1200 rpm x 15cm / 1353 rpm = 13.3 cm.
Neodymium Magnet Generator
How to make a generator from an induction motor?
This homemade generator eliminates the use of capacitor units. The source of the magnetic field, which induces the EMF and creates a current in the stator winding, is built on permanent niode magnets. In order to do this yourself, you must sequentially perform the following steps:
Remove the front and rear covers of the induction motor.
Remove the rotor from the stator.
What does an induction motor rotor look like?
The rotor is pumped, the upper layer is removed 2 mm more than the thickness of the magnets. In domestic conditions, it is not always possible to make a bore of the rotor with your own hands, in the absence of turning equipment and skills. You need to turn to specialists in turning workshops.
A template is prepared on a sheet of plain paper for placing round magnets, Ø 10-20 mm, thickness up to 10 mm, with an attractive force of 5-9 kg, per sq / cm, the size depends on the size of the rotor. The template is glued to the surface of the rotor, magnets are placed in strips at an angle of 15. 20 degrees relative to the axis of the rotor, 8 pieces in a strip. The figure below shows that on some rotors there are dark-light strips of displacement of the magnetic field lines relative to its axis.
Installing magnets on the rotor
The rotor with magnets is calculated so that four groups of strips are obtained, in a group of 5 strips, the distance between the groups is 2Ø of the magnet. Gaps in the group 0.5-1Ø of the magnet, this arrangement reduces the sticking force of the rotor to the stator, it must be rotated by two fingers;
The rotor on magnets, made according to the calculated template, is filled with epoxy resin. After it dries a little, the cylindrical part of the rotor is covered with a layer of fiberglass and again impregnated with epoxy resin. This eliminates the emergence of magnets during rotation of the rotor. The top layer on the magnets should not exceed the initial diameter of the rotor, which was before the groove. Otherwise, the rotor will not fall into place or during rotation will rub on the stator winding.
After drying, the rotor can be put in place and close the covers;
To test, the electric generator is necessary. to rotate the rotor with an electric drill, measuring the voltage at the output. The number of revolutions when the desired voltage is reached is measured by the tachometer.
Knowing the required number of revolutions of the generator, the belt drive is calculated according to the method described above.
An interesting application, when an electric generator based on an asynchronous electric motor, is used in the circuit of an electric motor-generator with self-feeding. When part of the power generated by the generator is supplied to an electric motor, which spins it. The remaining energy is spent on the payload. By implementing the principle of self-feeding, it is practically possible for a long time to provide the house with autonomous power supply.
Video. Generator from an induction motor.
For a wide range of electricity consumers, it makes no sense to buy powerful diesel power plants like TEKSAN TJ 303 DW5C with an output power of 303 kVA or 242 kW. Low-power gasoline generators are expensive, the best option is to make do-it-yourself wind generators or a self-feeding motor-generator device.
Using this information, you can assemble the generator yourself, with permanent magnets or capacitors. Such equipment is very useful in country houses, in the field, as an emergency power source, when there is no voltage in industrial networks. A full-fledged house with air conditioning, electric stoves and heating boilers, a powerful circular saw motor they will not pull. Temporarily provide electricity for household appliances of prime necessity can, lighting, refrigerator, TV and others that do not require large capacities.
DIY motor generator
Due to the non-standard method of generation, and the original design of the motor-generator, the modes of the generator and electric motor are combined in one process, and are inextricably linked. As a result, when the load is connected, the interaction of the magnetic fields of the stator and rotor forms a torque that coincides in direction with the moment created by the external drive.
In other words, as the power consumed by the load of the generator increases, the rotor of the motor-generator starts to accelerate, and accordingly, the power consumed by the external drive decreases.
For a long time there have been rumors on the Internet that a generator with a Gram ring anchor was capable of generating more electrical energy than was expended by mechanical energy and this was due to the fact that there was no braking moment under load.
The results of the experiments that led to the invention of the motor generator.
For a long time there have been rumors on the Internet that a generator with a Gram ring anchor was capable of generating more electrical energy than was expended by mechanical energy and this was due to the fact that there was no braking moment under load. This information prompted us to conduct a series of experiments with a ring winding, the results of which we will show on this page. For experiments, 24 pcs., Independent windings with the same number of turns were wound on a toroidal core.
1) Initially, the weight of the windings were connected in series, the findings on the load are located diametrically. In the center of the winding was a permanent magnet with the possibility of rotation.
After the magnet was driven by the drive, the load was connected and the drive speed was measured with a laser tachometer. As one would expect, the speed of the drive motor began to fall. The more power the load consumed, the more the revs fell.
2) For a better understanding of the processes occurring in the winding, instead of a load, a direct current milliammeter was connected. With a slow rotation of the magnet, one can observe what polarity and magnitude of the output signal is in a given position of the magnet.
It can be seen from the figures that when the poles of the magnet are opposite the terminals of the winding (Fig. 4; 8), the current in the winding is 0. When the magnet is in position, when the poles are in the center of the winding, we have the maximum current value (Fig. 2; 6).
3) At the next stage of the experiments, only one half of the winding was used. The magnet also rotated slowly, and the readings of the device were recorded.
The readings of the device completely coincided with the previous experiment (Fig. 1-8).
4) After that, an external drive was connected to the magnet and began to rotate it at maximum speed.
When connecting the load, the drive began to gain momentum!
In other words, during the interaction of the magnet poles and the poles formed in the winding with the magnetic circuit, when passing through the current winding, a torque appeared along the direction of the torque created by the drive motor.
Figure 1, there is strong braking of the drive when the load is connected. Figure 2, when the load is connected, the drive starts to accelerate.
5) In order to understand what is happening, we decided to create a map of the magnetic poles that appear in the windings when current passes through them. For this, a series of experiments was carried out. The windings were connected in different versions, and DC pulses were applied to the ends of the windings. At the same time, a permanent magnet was fixed on the spring, and in turn was located next to each of the 24 windings.
According to the reaction of the magnet (it was repelled or attracted), a map of the manifesting poles was compiled.
From the figures it is seen how the magnetic poles appeared in the windings, with different switching on (yellow rectangles in the figures, this is the neutral zone of the magnetic field).
When changing the polarity of the pulse, the poles, as expected, were reversed, so the different options for turning on the windings are drawn with the same power polarity.
6) Pa at a glance, the results in Figures 1 and 5 are identical.
In a more detailed analysis, it became clear that the distribution of the poles around the circumference and the "size" of the neutral zone are quite different. The force with which the magnet was attracted or repelled from the windings and the magnetic circuit is shown by the gradient filling of the poles.
Video: Chainsaw Speed Adjustment by Laser Tachometer
7) When comparing the data of the experiments described in paragraphs 1 and 4, in addition to the cardinal difference in the response of the drive to the load connection, and a significant difference in the "parameters" of the magnetic poles, other differences were revealed. During both experiments, a voltmeter was turned on in parallel with the load, and an ammeter was turned on in series with the load. If the readings of the instruments from the first experiment (point 1) are taken as 1, then in the second experiment (point 4), the voltmeter reading was also equal to 1. According to the ammeter reading, it was 0.005 from the results of the first experiment.
8) Based on the foregoing in the previous paragraph, it is logical to assume that if in the unused part of the magnetic circuit, to make a non-magnetic (air) gap, then the current strength in the winding should increase.
After the air gap was made, the magnet was again connected to the drive motor, and spun at maximum speed. The current strength actually increased several times, and began to be approximately 0.5 of the results of the experiment under paragraph 1, but at the same time there was a braking moment on the drive. 9) By the method described in paragraph 5, a map of the poles of this design was compiled.
10) Compare the two options
It is not difficult to assume that if you increase the air gap in the magnetic circuit, the geometrical arrangement of the magnetic poles in Figure 2 should approach that of Figure 1. And this, in turn, should lead to the acceleration effect of the drive, which is described in paragraph 4 (when connecting load, instead of braking, an additional moment is created to the drive torque).
11) After the gap in the magnetic circuit was increased to a maximum (to the edges of the winding), when the load was connected instead of braking, the drive again began to gain momentum.
In this case, the map of the poles of the winding with the magnetic circuit looks like this:
Based on the proposed principle of electricity generation, it is possible to design alternators, which, when the electric power in the load increases, do not require increasing the mechanical power of the drive.
The principle of operation of the Generator Motor.
According to the phenomenon of electromagnetic induction, when the magnetic flux passing through a closed circuit changes, an EMF appears in the circuit.
According to the Lenz rule: Induction current arising in a closed conducting circuit has such a direction that the magnetic field created by it counteracts the change in magnetic flux that caused this current. In this case, it does not matter how the magnetic flux moves in relation to the contour (Fig. 1-3).
The method of exciting the EMF in our motor-generator is similar to Figure 3. It allows you to use the Lenz rule to increase the torque on the rotor (inductor).
1) Stator winding 2) Stator magnetic circuit 3) Inductor (rotor) 4) Load 5) Direction of rotation of the rotor 6) Central line of the magnetic field of the poles of the inductor
When you turn on the external drive, the rotor (inductor) begins to rotate. When the beginning of the winding is crossed by a magnetic flux of one of the poles of the inductor, an EMF is induced in the winding.
When the load is connected, the current begins to flow in the winding and the poles of the magnetic field that has arisen in the windings according to the rule of E. X. Lenz are aimed at meeting the magnetic flux that excited them. Since the winding with the core is located along an arc of a circle, the magnetic field of the rotor moves along the turns (arc of a circle) of the winding.
At the same time, at the beginning of the winding, according to the Lenz rule, a pole appears that is identical with the pole of the inductor, and at the other end it is opposite. Since the poles of the same name are repelled, and the opposite ones are attracted, the inductor tends to take a position that corresponds to the action of these forces, which creates an additional moment directed along the rotation of the rotor. The maximum magnetic induction in the winding is achieved at the moment when the central line of the pole of the inductor is opposite the middle of the winding. With further movement of the inductor, the magnetic induction of the winding decreases, and at the moment the center line of the pole of the inductor leaves the winding, it is zero. At the same moment, the beginning of the winding begins to cross the magnetic field of the second pole of the inductor, and according to the rules described above, the edge of the winding from which the first pole begins to move away begins to push it away with increasing force.
Drawings: 1) Zero point, the poles of the inductor (rotor) are symmetrically directed to different edges of the winding in the winding EMF = 0. 2) The central fishing line of the north pole of the magnet (rotor) crossed the beginning of the winding, EMF appeared in the winding, and accordingly the magnetic pole appeared that was the same with the pole of the pathogen (rotor). 3) The rotor pole is located in the center of the winding, and the maximum EMF value in the winding. 4) The pole approaches the end of the winding and the EMF is reduced to a minimum. 5) The next zero point. 6) The central line of the south pole enters the winding and the cycle repeats (7; 8; 1).
GENERATOR FROM THE ENGINE OWN HANDS
From the CD-rom parsing, a number of brushless DC motors have accumulated (these are the ones that spin the disc). And they don’t seem to take up much space, but they often catch my eye. Finally I decided that I had to somehow decide on them.
So, this is a brushless DC motor, the position of the rotor in it is monitored by three Hall sensors, controlled by a driver chip BA6849FP (speed adjustment). In theory, everything is simple, but in practice, impressions can go off scale from just viewing the scarf on which the engine itself is installed.
Therefore, I did not delve into the purpose of the numerous cable conclusions, but simply took and halved the engine, and saw its stator. However, a full review of the circuit board was still unattainable. Realizing that there was no need for sacrifice, I unsoldered the wires (3 pieces) coming from the stator windings to the board, and then folded it up. broke the board in half with the metal mounting plate.
The freed stator flopped onto the table and, again, for educational purposes, was immediately unwound. Now I can report that the motor had three windings (phases) connected by the "star" method, but the option is possible when they can be connected by the "delta" method.
The electric motor certainly did not, but with it there was no shyness before the unknown, for now there was no unknown. In the photo, the conductors form windings and end with conclusions. The connections of the windings are different, but the electrical essence does not undergo large changes. The relatively thick wires of the stator windings suggested that it is possible to get a good current from this engine, if it is used as a generator, and even if it produces a few volts of voltage, then perhaps "happiness"!
I stopped here on such a scheme for removing an electric motor from a motor, however, now it is already a generator that produces electric current. This circuit was assembled and tested with the following ratings of electronic components: C1. 100 μF x 16 V, all six diodes 1N5817.
It would be interesting to try out such a scheme, but so far "your hands have not reached." As a more perfect option. put on the output stabilizer.
For further actions, another electric motor was taken and brought into proper condition for connection and mounting. Gears (gear pair) with a gear ratio of 1: 5 from the Chinese lantern. "bug".
Everything was mounted on a suitable foundation. Important in this operation is to correctly “take” the center-to-center distance of the gears and set their rotation axes in a single spatial plane.
The circuit is assembled, the newly turned generator is ready for the test.
With intensive, but without masochism, rotation of the large gear wheel with the fingers, the voltage easily reaches 1.7 volts (no load).
When connecting a load, 2.5 V and 150 mA light bulbs, the current reaches 120 mA. A light bulb flashes to the floor.
Video. work under load
I will take the liberty of declaring that even this particular engine can be used as a wind generator capable of generating enough electric current to charge one AAA battery with a voltage of 1.2 V and a capacity of up to 1000 mA inclusive. Please pay attention to the photo that shows the installation of gears on the base. On the right side of the large gear wheel and “ask for” the installation of another motor. The kinematic scheme will be as follows: one drive wheel rotates two followers. The possibilities are doubled, it becomes real to assemble a boost converter and even charge mobile phone batteries. I dealt with issues of electricity production Babay.
Electrical Engineering Forum
Discuss the article GENERATOR FROM THE ENGINE OWN HANDS
Homemade generator. Do it yourself
I found an article on the Internet on how to convert a car’s generator into a permanent magnet generator. Is it possible to use this principle and remake the generator with your own hands from an asynchronous electric motor? It is possible that there will be large energy losses, not the arrangement of the coils.
I have an asynchronous motor with a voltage of 110 volts, rpm. 1450, 2.2 amperes, single-phase. With the help of containers, I do not presume to make a home-made generator, since there will be big losses.
It is proposed to use simple engines according to this scheme.
If you change the engine or generator with round magnets from the speakers, do you need to install them in crabs? Crabs are two metal parts, anchored outside the field coils.
If you put magnets on the shaft, the shaft will bypass the magnetic lines of force. How then will the excitement be? The coil is also located on a metal shaft.
If you change the connection of the windings and make a parallel connection, accelerate to rpm above normal values, you get 70 volts. Where to get the mechanism for such revolutions? If you rewind it to reduce speed and lower power, then the power will drop too.
An asynchronous closed-rotor motor is iron, which is flooded with aluminum. You can take a home-made generator from a car with a voltage of 14 volts, a current of 80 amperes. This is not bad data. An engine with an alternating current collector from a vacuum cleaner or a washing machine can be used for a generator. Install magnetization on the stator, remove the DC voltage from the brushes. At the highest EMF, change the angle of the brushes. The coefficient of performance tends to zero. But, better than a synchronous type generator, not invented.
I decided to try a homemade generator. The single-phase asynchronous motor from the baby’s washer twisted with a drill. I connected a 4 microfarad capacitance to it, it turned out 5 volts 30 hertz and a current of 1.5 milliamperes for a short circuit.
Not every electric motor can be used as a generator in this way. There are motors with a steel rotor having a low degree of magnetization on the remainder.
You need to know the difference between electric energy conversion and energy generation. There are several ways to convert 1 phase to 3. One of them is mechanical energy. If the power station is disconnected from the outlet, then the entire conversion disappears.
Where the movement of the wire with increasing speed will come from, is clear. Where the magnetic field will be for obtaining the EMF in the wire is not clear.
It is easy to explain. Due to the mechanism of magnetism that remains, an EMF is formed in the anchor. There is a current in the stator winding, which is closed on the capacitance.
The current has arisen, which means that it gives amplification to the electromotive force on the coils of the rotor shaft. The current that appears gives an amplification of the electromotive force. The stator electric current forms an electromotive force much more. This goes to the establishment of equilibrium of the stator magnetic fluxes and the rotor, as well as additional losses.
The size of the capacitors is calculated so that the voltage at the terminals reaches the nominal value. If it is small, then reduce the capacity, then increase. There were doubts about the old engines, which supposedly are not excited. After accelerating the rotor of the motor or generator, you need to poke quickly in any phase with a small amount of volts. Everything will return to normal. Charge the capacitor to a voltage equal to half the capacity. Switching on is done with a three-pole switch. This applies to a 3-phase motor. Such a scheme is used for generators of passenger carriages, since they have a short-circuited rotor.
A homemade generator can be done in a different way. The stator has a cunning design (has a special design solution), it is possible to adjust the output voltage. I made this type of generator with my own hands in construction. The engine took a power of 7 kW at 900 rpm. I connected the field winding according to the scheme of a 220 V triangle. I started it at 1600 rpm, the capacitors were 3 at 120 uF. They were switched on by a contactor with three poles. The generator acted as a three-phase rectifier. An electric drill with a 1000-watt collector was fed from this rectifier, and a 2200-watt 220 V circular saw and a 2000-watt angle grinder were used.
I had to make a soft start system, another resistor with a shorted phase after 3 seconds.
For motors with manifolds, this is wrong. If you double the rotational frequency, then the capacity will decrease.
The frequency will also increase. The tank circuit was switched off automatically, so as not to use a reactivity torus, not to consume fuel.
During operation, press the contactor stator. Three phases dismantled them out of use. The reason lies in the high clearance and increased dispersion of the pole field.
Special mechanisms with a double cage for a squirrel and slanting eyes for a squirrel. Still, I got 100 volts and a frequency of 30 hertz from the washing machine’s motor, the 15-watt lamp does not want to burn. Very weak power. It is necessary to take the motor stronger, or put more capacitors.
Under the cars, a generator with a squirrel-cage rotor is used. Its mechanism comes from the gearbox and the belt drive. Rotational speed 300 rpm. It is located as an additional load generator.
You can design a homemade generator, a gasoline power station.
Instead of a generator, use a 3-phase asynchronous motor of 1.5 kW at 900 rpm. Italian electric motor, can be connected by a triangle and a star. First, I put the motor on the base with a DC motor, attached to the coupling. He began to turn the engine at 1100 rpm. A voltage of 250 volts appeared in phases. I connected a 1000-watt light bulb, the voltage immediately dropped to 150 volts. This is probably from phase imbalance. A separate load must be included for each phase. Three light bulbs of 300 watts will not be able to reduce the voltage to 200 volts, theoretically. You can put a capacitor more.
Engine revolutions must be done more, do not reduce under load, then the mains supply will be constant.
Significant power is needed, the auto-generator will not give such power. If you rewind a large KAMAZ, then 220 V will not come out of it, since the magnetic circuit will be oversaturated. It was designed at 24 volts.
Today I was going to try to connect the load through a 3-phase power supply (rectifier). In the garages, the lights were turned off, it did not work. In the city of power engineers systematically turn off the light, so you need to make a constant source of electricity. For electric welding, there is a hitch, hooked to the tractor. To connect an electric tool, you need a constant voltage source of 220 V. There was an idea to design a home-made generator with your own hands, and an inverter to it, but you can not work on batteries for a long time.
Recently turned on the electricity. I connected an induction motor from Italy. I put it with the chainsaw motor on the frame, twisted the shafts together, put the rubber coupling. The coils are connected by a star circuit, the capacitors are delta, 15 microfarads each. When I started the motors, the power output failed. I connected a capacitor charged to the phases, the voltage appeared. The engine gave out its power of 1.5 kW. At the same time, the supply voltage dropped to 240 volts, at idle it was 255 volts. The sander worked fine for him at 950 watts.
I tried to increase the engine speed, but the excitation does not work. After the capacitor contacts the phase, the voltage appears immediately. I will try to put another engine.
What designs of systems abroad are made for power plants? On 1-phase, it is clear that the rotor owns the winding, there is no phase imbalance, because it is one phase. In 3-phase there is a system that provides power adjustment when connecting motors with the highest load to it. You can also connect an inverter for welding.
On the weekend I wanted to make a home-made generator with my own hands with an asynchronous motor connected. A successful attempt to make a home-made generator turned out to be the connection of an old engine with a cast iron housing of 1 kW and 950 revolutions. The motor is energized normally, with a single capacity of 40 microfarads. And I installed three tanks and connected them with a star. This was enough to start the electric drill, an angle grinder. I wanted to get a voltage output in one phase. For this, I connected three diodes, a half-bridge. The fluorescent lamps burned out for lighting, and the bags in the garage burnt out. I will wind the transformer in three phases.
DIY asynchronous motor generator
The desire to develop an autonomous source for the production of electricity made it possible to build a generator from a conventional asynchronous motor. Development is distinguished by reliability and relative simplicity.
Types and description of asynchronous motor
There are two types of motors:
The device is used in various industries:
Like a conventional engine for wind power plants.
For your own independent catering apartment or house.
Like small hydropower stations.
As an alternative inverter type of generator (welding).
To create an uninterrupted AC power system.
Advantages and disadvantages of the generator
The positive qualities of development include:
Simple and quick assembly with the ability to avoid disassembling the motor and rewinding the winding.
The ability to carry out the rotation of an electric current using a wind or hydraulic turbine.
The use of the device in motor-generator systems to convert a single-phase network (220V) to a three-phase (380 V).
The ability to use the development in places where there is no electricity, using an internal combustion engine for promotion.
The difficulty of calculating the capacity of the condensate, which is connected to the windings.
It is difficult to reach the maximum power mark that self-development is capable of.
Homemade asynchronous generator
Principle of operation
The generator generates electrical energy, provided that the number of revolutions of the rotor is slightly higher than the synchronous speed. The simplest type produces about 1800 rpm, given that the level of its synchronous speed becomes 1500 revolutions.
Its principle of operation is based on the conversion of mechanical energy into electricity. It is possible to force the rotor to rotate and produce electricity using strong torque. Ideally, a constant idle that is able to maintain the same speed.
All types of motors operating on a constant current are called asynchronous. They have a magnetic field of the stator spinning rather than the field of the rotor, respectively directing it in the direction of its movement. To change the electric motor to a functioning generator, it will be necessary to increase the speed of movement of the rotor so that it does not follow the magnetic field of the stator, but begins to move in the opposite direction.
You can get a similar result by connecting the device to the mains, a capacitor with a large capacity, or a whole group of capacitors. They charge and store energy from magnetic fields. The capacitor phase has a charge that is opposite to the motor current source, due to which the rotor slows down, and the current production by the stator winding begins.
The scheme is very simple and does not require special knowledge and skills. If you start development without connecting it to the network, rotation will begin and, after reaching the synchronous frequency, the stator winding will begin to generate electrical energy.
By attaching a special battery of several capacitors (C) to its terminals, it is possible to obtain a leading capacitive current, which will create magnetization. Capacitor capacitance must be above critical designation C0, which depends on the size and characteristics of the generator.
In this situation, a self-starting process takes place, and a system with a symmetric three-phase voltage is mounted on the stator winding. The indicator of the generated current directly depends on the capacitance for the capacitors, as well as the characteristics of the machine.
The simplest scheme for starting an induction motor
Do it yourself
To convert an electric motor into a working generator, you need to use non-polar capacitor banks, so it is better not to use electrolytic capacitors.
In a three-phase motor, you can connect a capacitor according to the following schemes:
"Star". makes it possible to conduct generation at a lower number of revolutions, but with a lower output voltage;
"Triangle". comes into operation with a large number of revolutions, respectively, produces more voltage.
You can create your own device from a single-phase motor, but provided that it is equipped with a short-circuit rotor. To start development, you should use a phase-shifting capacitor. A single-phase collector-type motor is not suitable for alteration.
Appearance of a simple wind generator using an asynchronous motor
Creating your own generator is easy, the main thing is to have all the necessary elements:
A tachogenerator (a device for measuring current) or a tachometer.
Capacitance under capacitors.
Since it will be necessary to reconfigure the generator in such a way that the rotation speed exceeds the engine speed, initially it is necessary to connect the engine to the mains and start it. Then, using the tachometer, determine the speed of its rotation.
Having learned the speed, it is necessary to add another 10% to the designation obtained. For example, the technical indicator of the motor is 1000 rpm, then the generator should have about 1100 rpm (10000.1% = 100, 1000100 = 1100 rpm).
You should choose a capacity for capacitors. To determine the size, use the data in the table.
Important! If the capacity is large, the generator will begin to heat up.
Select the appropriate capacitors that can provide the required speed of rotation. Be careful when installing.
Important! All capacitors must be insulated with a special coating.
The device is ready and can be used as source of electricity.
Important! A device with a squirrel-cage rotor generates a high voltage, so if a 220V rating is needed, a step-down transformer should be additionally installed.
The magnetic generator has several differences. For example, it does not need to install capacitor banks. The magnetic field that will create electricity in the stator winding is created due to niode magnets.
Features of creating a generator:
It is necessary to unscrew both engine covers.
It will be necessary to eliminate the rotor.
The rotor must be pierced by removing the top layer of the desired thickness (magnet thickness 2mm). It is extremely difficult to independently perform this procedure without turning equipment, so you should contact a turning service.
Make a template for round magnets on a piece of paper, Based on the parameters, the diameter is 10–20 mm, the thickness is about 10 mm, and the swearing force is about 5–9 kg per cm 2. The size should be selected depending on the dimensions of the rotor. Then attach the created template to the rotor and place the magnets with poles and at an angle of 15-20 0 to the axis of the rotor. The approximate number of magnets in one strip is about 8 pieces.
You should get 4 groups of strips, each of 5 strips. Between groups, a distance of 2 diameters of the magnet should be maintained, and between the strips in the group, 0.5-1 diameter of the magnet. Due to this arrangement, the rotor will not stick to the stator.
Having installed all the magnets, it is necessary to fill the rotor with a special epoxy resin. Once it dries, cover the cylindrical element with fiberglass and impregnate with resin again. Such fastening will allow the escape of magnets at the time of movement. Make sure that the diameter at the rotor is the same as before the groove, so that during installation it does not rub against the stator winding.
Having dried the rotor, it can be installed in place and screw on both engine covers.
To test. To start the generator, you need to turn the rotor using an electric drill, and at the output, measure the received current with a tachometer.
Remodel or not
To determine whether the operation of a self-made generator is effective, one should calculate how justified the efforts to transform the device are.
This is not to say that the device is very simple. The induction motor is not inferior in complexity to a synchronous generator. The only difference is the lack of an electric circuit to initiate the work, but it is replaced by a capacitor bank, which does not simplify the device.
The advantage of capacitors is that they do not require additional maintenance, and they receive energy from the magnetic field of the rotor or the generated electric current. From this we can say that the only plus from this development is the lack of need for maintenance.
Another positive quality is the effect of the clear factor. It consists in the absence of higher harmonics in the generated current, that is, the lower its indicator, the less energy is spent on heating, the magnetic field and other moments. For a three-phase electric motor, this figure is about 2%, while for synchronous machines it is at least 15%. Unfortunately, taking into account the indicator in everyday life when different types of electrical appliances are included in the network is unrealistic.
Other indicators and development properties are negative. He is not able to provide the rated industrial frequency of the voltage produced. Therefore, the device is used together with rectifier machines, as well as for charging the battery.
The generator is sensitive to the slightest drops in electricity. In industrial developments, a battery is used to excite, and in a home-made version, part of the energy goes to a capacitor bank. In the case when the load on the generator is above nominal, it does not have enough electricity to recharge, and it stops. In some cases, capacitive batteries are used that change their dynamic volume depending on the load.
Unfortunately, it is unrealistic to calculate, take into account and compensate for changes in current that occur by chance, so the device is characterized by unstable operation.
The device is very dangerous, therefore it is not recommended to use a voltage of 380 V, unless in emergency.
According to precautionary measures and safety measures it is necessary to establish additional grounding.
Watch out for thermal development. He is not inherent to work at idle. To reduce the thermal effect, a capacitor should be well selected.
Correctly calculate the power of the generated electrical voltage. For example, when only one phase functions in a three-phase generator, it means that power is 1/3 of the total, and if two phases work, 2/3, respectively.
It is possible to indirectly control the frequency of unstable current. When the device is idling, the output voltage begins to increase, and exceeds the industrial (220 / 380V) by 4-6%.
It is best to isolate development.
Homemade invention should be equipped with a tachometer and voltmeter, to fix his work.
It is advisable to provide special buttons to turn on and off the mechanism.
The level of efficiency will be reduced by 30-50%, this phenomenon is inevitable.
How to make a generator from an induction motor?
An asynchronous or induction type generator is a special kind of device that uses alternating current and has the ability to reproduce electricity. The main feature is the performance of rather quick turns that the rotor makes, in terms of the speed of rotation of this element it is significantly superior to the synchronous variety.
One of the main advantages is the ability to use this device without significant circuit transformations or lengthy tuning.
A single-phase type of induction generator can be connected by supplying the necessary voltage to it, for this it will need to be connected to a power source. However, a number of models produce self-excitation; this ability allows them to function in a mode independent of any external sources.
This is accomplished by sequentially bringing the capacitors to working condition.
Asynchronous motor generator circuit
generator circuit based on an induction motor
In virtually any electric type machine designed as a generator, there are 2 different active windings, without which the device cannot function:
Field winding, which is located on a special anchor.
Stator winding, which is responsible for the formation of electric current, this process occurs inside it.
In order to visualize and more accurately understand all the processes that occur during the operation of the generator, the most optimal option would be to consider in more detail the scheme of its operation:
Voltage, which is supplied from a battery or any other source creates a magnetic field in the anchor winding.
Rotate device elements together with the magnetic field can be implemented in various ways, including manually.
A magnetic field, rotating at a certain speed generates electromagnetic induction, due to which an electric current appears in the winding.
The vast majority of schemes used today it does not have the ability to provide voltage anchor winding, this is due to the presence of a squirrel-cage rotor in the design. Therefore, regardless of the speed and time of rotation of the shaft, the supply terminals of the device will still be de-energized.
When remaking the engine into a generator, the independent creation of a moving magnetic field is one of the basic and mandatory conditions.
Before you take any action to remake the induction motorin the generator, you need to understand the device of this machine, which is as follows:
Stator, which is equipped with a network winding with 3 phases, placed on its working surface.
Winding It is organized in such a way that it resembles a star in its shape: 3 initial elements are connected to each other, and 3 opposite sides are connected to slip rings, which do not have any common ground between them.
Contact rings have reliable fasteners to the rotor shaft.
In construction there are special brushes that do not make any independent movements, but contribute to the inclusion of a rheostat with three phases. This allows you to change the resistance parameters of the winding located on the rotor.
Often, in the internal device there is such an element as an automatic short circuit, necessary in order to short-circuit the winding and stop the rheostat, which is in working condition.
Another additional element of the device generator may be a special device that spreads the brushes and slip rings at the moment when they pass the stage of closure. Such a measure contributes to a significant reduction in friction losses.
Making a generator out of an engine
In fact, any asynchronous electric motor can be remade with its own hands into a device that functions as a generator, which can then be used in everyday life. For this purpose, even an engine taken from an old-style washing machine or any other household equipment may be suitable.
In order for this process to be successfully implemented, it is recommended to adhere to the following algorithm of actions:
Remove engine core layer, thanks to which a depression will be formed in its structure. This can be done on a lathe, it is recommended to remove 2 mm. around the core and make additional holes with a depth of about 5 mm.
Take off dimensions from the resulting rotor, and then from the tin material to make a template in the form of a strip that will correspond to the dimensions of the device.
Install in the resulting free space neodymium magnets, which must be purchased in advance. Each pole will require at least 8 magnetic elements.
Magnet fixing can be carried out using universal superglue, but it must be borne in mind that when approaching the surface of the rotor they will change their position, so they must be firmly held by hands until each element adheres. It is further recommended that safety glasses be used during this process to avoid splashing glue into the eyes.
Rotor wrap plain paper and scotch tape, which will be required to fix it.
The end part of the rotor to fill with plasticine, which will ensure the sealing of the device.
After committed actions it is necessary to process free cavities between the magnetic elements. To do this, the remaining space between the magnets must be filled with epoxy. It will be most convenient to cut a special hole in the shell, transform it into a neck and seal the borders with plasticine. Resin can be poured inside.
Wait until it solidifies. filled resin, after which the protective paper cover can be removed.
Rotor must be locked with a machine or vice so that it can be processed, which consists in grinding the surface. For these purposes, you can use sandpaper with an average grain size parameter.
Determine state and the purpose of the wires leaving the engine. Two should lead to a working winding, the rest can be cut so as not to get confused in the future.
Sometimes the rotation process is pretty bad, most often the cause is old worn and taut bearings, in which case they can be replaced with new ones.
Generator rectifier can be assembled from special silicon diodes that are designed specifically for these purposes. Also, you will need a controller to charge, virtually all modern models are suitable.
After all these actions are completed, the process can be considered completed, the induction motor was converted into a generator of the same type.
Evaluation of the level of effectiveness. is it profitable?
Generation of electric current by an electric motor is quite real and realizable in practice, the main question is how profitable is this?
The comparison is carried out primarily with a synchronous version of a similar device, in which there is no electric excitation circuit, but despite this fact, its device and design are not simpler.
This is due to the presence of a capacitor bank, which is an extremely technically complex element that is not available in an asynchronous generator.
The main advantage of an asynchronous device is that the available capacitors do not require any maintenance, since all the energy is transferred from the magnetic field of the rotor and the current that is generated during the operation of the generator.
The electric current created during operation does not actually have higher harmonics, which is another significant advantage.
Asynchronous devices do not have other advantages besides the above, but they have a number of significant drawbacks:
During their operation there is no possibility to ensure the rated industrial parameters of the electric current generated by the generator.
High sensitivity even to the smallest differences in workload parameters.
If the permissible generator loads are exceeded, there will be a shortage of electricity, after which recharging will become impossible and the generation process will be stopped. To eliminate this drawback, often use batteries with significant capacity, which have the ability to change their volume depending on the magnitude of the loads.
The electric current generated by an asynchronous generator is subject to frequent changes, the nature of which is unknown, it is random in nature and can not be explained by scientific arguments.
The impossibility of accounting and appropriate compensation for such changes is explained by the fact that such devices have not gained popularity and are not widely used in the most serious industries or domestic affairs.
The functioning of an induction motor as a generator
In accordance with the principles by which all similar machines operate, the operation of an induction motor after conversion to a generator occurs as follows:
After connecting the capacitors to the terminals, on the winding of stators a number of processes take place. In particular, in the winding a forward current movement begins, which creates the magnetization effect.
Only with matching capacitors parameters of the required capacity, the device is self-excited. This contributes to the emergence of a symmetrical voltage system with 3 phases on the stator winding.
The value of the total voltage will depend on the technical capabilities of the machine used, as well as the capabilities of the capacitors used.
Thanks to the described actions, the process of converting a squirrel-cage induction motor to a generator with similar characteristics occurs.
In everyday life and in production, such generators are widely used in various fields and areas, but they are most in demand for performing the following functions:
Use as engines for wind farms, this is one of the most popular features. Many people make asynchronous generators on their own to use them for this purpose.
Work as a hydroelectric power station with a small output.
Catering and electricity from a city apartment, private country house, or separate household equipment.
Basic functions welding generator.
Uninterrupted equipment alternating current of individual consumers.
Tips for making and operating
It is necessary to have certain skills and knowledge not only in the manufacture, but also in the operation of such machines, the following tips can help:
Any kind of asynchronous generators regardless of the sphere in which they are used, is a dangerous device, for this reason it is recommended to isolate it.
In the process of manufacturing the device it is necessary to think over the installation of measuring instruments, since it will be necessary to obtain data on its functioning and operating parameters.
Special buttons, with which you can control the device, greatly facilitates the operation process.
Grounding is a mandatory requirement that must be implemented before the operation of the generator.
During work, The efficiency of an asynchronous device can periodically decrease by 30-50%, it is not possible to overcome the occurrence of this problem, since this process is an integral part of energy conversion.