How to call the rotor grinder multimeter. Preparing the tool for testing

Table of Contents:

How to check the anchor on a grinder multimeter

Any, even the highest quality tool, is subject to breakdown. Especially if it is intensively exploited. In the case of a breakdown of a grinder, you are unlikely to get a tool on your own. However, a preliminary inspection can be carried out without special skills.

The most commonly anchor fails. Damage can be mechanical. During visual examination, uneven wear of the brushes, as well as their burning, will be visible. In addition, with a faulty anchor, the grinder will vibrate and heat.

There are electric breakdowns. These include:

Such malfunctions can be identified using special measuring devices, for example, multimeter.

Checking the rotor and stator using a multimeter

The stator is the motionless part of the electric motor designed to create an electromagnetic field in which the rotor rotates (the moving part of the motor). The number of possible causes of the malfunction of the angular grinding machine. The “grinder”. Includes a break or short circuit of the stator winding turns (coil).

Possible reasons

Factors causing the stator failure:

Signs by which you can understand that the stator is faulty:

  • The smell of burning insulation appears.
  • The case overheats.
  • Smoke appears.
  • The rotation of the shaft slows down or stops.
  • The shaft spontaneously spontaneously spaces, the tool is dramatically gaining maximum speed.

The wires of the winding are covered with a protective layer of insulating varnish. When overheating, it burns out and destroys. This causes a short circuit of the turns. The varnish at the same time makes a specific smell. The closure of only one of the wires completely disables the grinder.

Rules that will help to avoid overheating of the Ushm engine:

  • Turn off the device after working at low speeds not immediately, but after about one minute.
  • When working under load at low speeds, make frequent breaks.

Often you can avoid replacing a faulty stator by rewinding its winding. The rewinding of the spoiled coil of the stator of the grinder can be done with your own hands, but it is recommended to entrust this work to a specialist.

Dismantling the grinder

How to check the stator angular grinding machine (grinder)? You need to start with disassembling the device. You will need a screwdriver to do the work.

  • Remove from the surface on which a disassembly of the grinder will be made, all extra details.
  • Remove the working disk.
  • Unscrew the screw.
  • Unscrew the screws.
  • Paste the casing towards the cord.

The stator is located on the outer side of the engine, on top of the rotor. To get the stator first you have to remove the brushes, then remove the gearbox and then stretch the anchor from the grinder after that. The rotor from the stator before checking you need to remove. Inspection is recommended to be carried out in bright light. First of all, you need to carefully examine the winding and make sure that there are no visible breaks on it. If the inspection has not revealed the cause of the stator malfunction, then you will need a special device for verification.

Short circuit indicator check

You can detect a shutters of the winding or short circuit in it using an indicator of short.Closed turns (IR). Other names are an interval indicator or indicator of defects in windings of electric machines.

  • Power supply;
  • Housings with LCD display, nests for connecting accessories;
  • Connecting wires;
  • Large induction sensor;
  • Small induction sensor.

The procedure for checking the stator of the grinder with the Ivvy device:

  • Inspect the Interpreter indicator. Make sure that there are no external damage, integrity of the connecting wires and sensors.
  • Connect the power supply.
  • Press the power button and make sure the device is about.
  • If the indicator of the winding defects has been in the cold for a long time, then it needs to be kept at room temperature at least 2 hours.
  • Disable Ushm power supply.
  • Select from two sensors large or small, depending on the size of the stator.
  • If the passport of the corner grinding machine does not indicate the nominal voltage attached to one round of the winding, then it must be determined by the formula: the nominal voltage of the entire coil is divided into the number of turns.
  • Turn on the device.
  • Install on the indicator the closest to the amplitude of the pulse test voltage that is obtained in the calculation.
  • Pressing the sensor to the surface of the winding, sequentially check all the grooves, waiting 3-4 s. If a short circuit is detected, the device will make a sound signal, and an appropriate inscription will appear on the display.
  • If short.Closed turns were not detected, then install the following (larger in value) amplitude on the device and make sure that the reserve of insulation of the winding is available.
  • Turn off the device.

The indicator of the winding defects can check the state of insulation between the coils of the stator and the rotor, as well as between the stator winding and the grinder body. If there is no way to buy a ready.Made device, then you can make a simpler indicator of short.Closed turns yourself.

Checking a multimeter

You can make sure that the stator can be used using the device. Multimeter. This is a universal measuring device. They can measure several electrical values: voltage, current strength, resistance. The device consists of a case on which there are a display, a switch and a nest, and two cords with probes (plus and minus). The minus probe is always connected to the lower nest, and the plus to the middle or upper, depending on the current strength in the test device.

To check the stator Ushm (Bulfur), it is necessary to set the resistance value from 20 to 200 Ohms on the multimeter and alternately bring the probes of the measuring device to the windings. If the resistance is the same everywhere, then the coil is working. If the device shows a different resistance at some points, then the winding has a short circuit or a break in one of the turns. On the same principle, the stator is checked by an ohmmeter. Its difference from the multimeter is that this device can only measure the resistance.

Device for checking the anchors and stators of electric machines

Another device with which you can believe the stator of the grinder is a device for verification of anchors and stators of electrical machines PUNS 5. The device has light and sound alarms, allows you to detect an interval closing of windings, break, measure the insulation resistance of the coils.

How to check the anchor of the grinder for serviceability

If the anchor is faulty, the engine overheating occurs, the insulation of the winding is melted, the turns are shortened shortly. Contacts connecting the anchor winding to the collector plates are soldered. The current supply stops and the engine stops working.

Standard diagnostics

Before you take the diagnostic device, inspect the anchor. It may be damaged. If the wiring is melted, the burnt insulation varnish will leave black traces or a specific smell. You can see bent and crumpled turns or conductive particles, for example, the remnants of the solder. These particles are the cause of a short circuit between turns. Lamels have bent edges called cocks to connect with the winding.

Due to violation of these contacts, the lamella is burned out.

Other damage to the collector: raised, worn or burnt plates. Graphite from brushes can accumulate between the lamels, which also indicates a short circuit.

How to check the anchor of the grinder for serviceability

If the anchor is faulty, the engine overheating occurs, the insulation of the winding is melted, the turns are shortened shortly. Contacts connecting the anchor winding to the collector plates are soldered. The current supply stops and the engine stops working.

Standard diagnostics

Before you take the diagnostic device, inspect the anchor. It may be damaged. If the wiring is melted, the burnt insulation varnish will leave black traces or a specific smell. You can see bent and crumpled turns or conductive particles, for example, the remnants of the solder. These particles are the cause of a short circuit between turns. Lamels have bent edges called cocks to connect with the winding.

Due to violation of these contacts, the lamella is burned out.

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Other damage to the collector: raised, worn or burnt plates. Graphite from brushes can accumulate between the lamels, which also indicates a short circuit.

How to correctly determine the malfunction of the stator of the rotor of the perforator Makit and choose the brushes

Any power tools begin to refuse over time. Malfunctions are divided into mechanical and electrical. Of the electrical malfunctions, there are most often malfunctions associated with the refusal of the work of brushes. In second place: failure of the bearings of the anchor.

The malfunctions associated with the failure of the stator or rotor are less common.And how to correctly determine the malfunction of the stator, the rotor of the punch makit 2450 and 2070, replace the brushes? And here the fundamental electrical circuit of the perforator Makita 2450, 2470 will help us.

How to repair or replace the brushes of the perforator Makita 2450 and 2470

The fact that the replacement of the punch brush is required is indicated by increased sparking in the area of ​​the rotor collector, the smell of Gary, and the heating of the brush holders.

Dawson DDM350 TRMS Digital Pen-type Multimeter

The new or renovated perforator of the spark under the brushes costs evenly, constant length and there is no breakdown of the spark in a circle.To wear the bearings, damage to the insulation of the rotor or stator clearly indicates the spark over the entire circle of the collector.

The appearance of this kind of spark indicates the burning of collector plates, failure of the rotor or stator.

How to remove the electric carriers of the punch Makita

As a rule, it is recommended to change brushes after 70 120 of the operation of the power tool.

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To replace the coal brushes poses.65, you have to get to them.The back cover must be removed from the perforator, it is attached with three self.Cutting bolts.

Disconnect the supply wires. Using a screwdriver, remove the latches on the brushes and free them.

Remember! With prolonged operation of the tool, it is not allowed to reduce the length of the working part of the brushes from the nominal by 1/3 (about 8 mm).With the wear of one brush, both are subject to replacement.

By the way, a fake can also work well if it is made of the right material and strictly according to the drawings.

call, rotor, grinder, multimeter, tool

How to make brushes yourself?

The cheapest is the electricity to pick up from other models of the power tool to be subtle to the desired size with a regular file. This is economical, but they will last less original. You can, as an option, will fit the coal core of the battery or other elements.

You need to take the battery and pull out the central coal electrode out of it. The electrode must be sharpened with the help of the files to the desired sizes of the old electric shock.(This is introductory information and is not essential for use)

It is worth noting that the quality of the graphite directly affects the life of operation and sparking

Home.Made brushes made of carbon rod

After making sure the brushes are worn out, select analogues.

Installation of brushes

Before inserting the brushes into place, it is necessary to clean the brush holders from the carbon. This is done with the help of a rag, moistened in a solvent. Nar in the form of particles obtained with intensive sincerity is preferable to remove with small suction. The purified brush holders are installed in place, brushes are inserted into them and clamped on top.

How to determine the integrity of the stator without analyzing the punch

To determine the integrity of the stator, it is necessary to call its windings, measure the resistance of the winding and insulation resistance.

To measure the resistance of the winding of the makit perforator, it is necessary to connect one end of the tester to the released brush holder, and the second to one end of the electric power controller.

If the device does not show anything, change the second end of the fork. If the resistance is equal, in the stature, the break and it requires replacement or repair.

Do not forget, without the fundamental electrical circuit of the Makita punch 2450,2470 you can not do.

Simple connection of the collector engine

If some resistance is shown, it is important to measure its exact value. As a rule, the resistance of the winding of the stator punch Makita-2450 at a temperature of 20ºС lies in the range of 25 Ohms.

In more detail, understand why the extension of the anchor collector occurs and which brushes are better? Will help to figure out the video, at the end of the viewing video, important tips for selecting brushes

How to remove the Makita 2450 and 2470 punch stator for accurate diagnosis and repair

To remove the stator pos.59, you need to remove the brushes, unscrew the four screws of fastening the cover of the mechanical unit. They are twisted in the end of the lid.Pulling the black case and the green in different directions you will free the case with the stator. The stator is fixed in the green case.

To remove it, you need to remove the plastic gasket pos.58 and knock on the end of the body with a wooden kiyanka or bar. The stator will stick out, it remains to pull it out, blow and finally check it.

If you have a short circuit checking device, then you can immediately check the stator on the short circuit. The device is called IK-32.

The procedure for checking the stator windingsFor an accurate check, disconnect the two stator windings from each other on an electric circuit. Check the resistance of each winding, they should be exactly the same.

With the difference in resistance, the winding with less resistance most likely has an interval circuit.

Checking the punch stator Makita 2470 and 2450 with your own handsDiagnosis of the anchor, stator with a KZ device and homemade

Diagnostics of the anchor and stator short circuit indicator.Checking the anchor.Stator check.

How to check the suitability of the rotor of the punch makit

Makita begin to check the fitness of the rotor in the perforator with a dismantling from the body.But first, external studies need to be conducted. If in the rotor the spark from brushes on the collector covers the weight of the collector, if the punch does not develop speed during operation and it has a power, this is the first sign of the rotor malfunction.

How to get a rotor from the bodyTo get the rotor from the case, it is necessary to divide the black and green buildings as in the case of the dismantling of the stator.

Having disconnected the stator body, take the gearbox (black) in the right hand, and the rotor in the left and pull in different directions to their complete separation. The rotor is kept in the gearbox due to the friction of the braids.

Carefully inspect the rotor collector. It should not have traces of scratches from brushes. The collector lamps should be clean.

Checking the stator multimeter

The electric starter is located on the outer section of the electric motor, on top of the rotor. Before checking the stator, it is necessary to dismantle it and get the brushes, and then dismantle the gearbox. Previously, carefully examine the winding and make sure that there are no visible tears and other defects on its surface.

Possible causes and signs of a non.Working stator of the grinder:

  • Sharp increase in voltage;
  • Penetration of moisture inside the engine;
  • Overload of the power tool and the created internal overheating of the nodes;
  • Sharp remove the cord from the outlet, with a working tool;
  • The appearance of the smell of burning rubber or plastic;
  • Overheating of the body;
  • The appearance of smoke from the electric motor during its operation;
  • Slow rotation of the shaft or its complete absence;
  • The grinder dramatically gains speed.

The multimeter allows you to check the presence of a break in stator windings, for this it is necessary to perform the following actions:

  • The meter exhibits the maximum of 200 ohms.
  • They begin to check the errors of the multimeter, for this they touch the probes among themselves, the tester arrows should indicate “0”.
  • Concern the probes of conclusions on the windings, if the scale of the device is shown “infinity”, the winding is not working and rewinds are necessary.
  • Check the presence of a short circuit on the case. A very dangerous state of power tool, which not only causes a drop in its power, but is also a potential source of user electric shock.
  • Include resistance measurement.
  • The red probe is installed at the output output, the black one is fixed on the stator case.
  • With a short circuit winding on the case, on the display r is less than on the working. This failure is eliminated only by rewinding of windings.
  • To measure the inter.Seal short circuit in the electrostator, measure R on a separate winding.
  • Determine the “0” point of the windings, measuring R of each. The smallest resistance will indicate a faulty.

The multimeter allows you to quite accurately determine failures in the work of the anchor and the stator of the engine of the grinder. The discovered failure can be eliminated by rewinding the electric motor or replacing from the remote control. Currently, there are enough such sets in the retail network for most popular Ushm models.

After repairing the stator or rotor, the tool is revealed according to the stored disassembly pictures. Check the performance of the tool. If everything is done correctly, the Bulgarian will serve its owner for more than one year.

Checking the indicator of short.Closed turns (IKZ)

There are anchors in which there are no wires connected to the collector due to filling with an opaque compound or due to a bandage. Therefore, it is difficult to determine the switch on the collector regarding the grooves. The indicator of short.Closed turns will help in this.

This device is small in size and is easy to operate.

First check the anchor for the absence of cliffs. Otherwise, the indicator will not be able to determine a short circuit. To do this, measure the resistance between two neighboring lamellas. If the resistance exceeds the average at least twice, then there is a break. In the absence of a cliff, proceed to the next stage.

The resistance regulator allows you to choose the sensitivity of the device. He has two bulbs: red and green. Set up the regulator so that the red light starts to burn. On the indicator case there are two sensors in the form of white points located at a distance of 3 centimeters from each other. Attach the indicator indicator to the winding. Slowly twist the anchor. If a red light lights up, then there is a short circuit.

How to check the serviceability and perform repair of the anchor of the grinder with your own hands, step.By.Step instructions, video

As Shakespeare said: “Nothing forever under the moon”. Household appliances, alas, is not an exception. It happens that even the most reliable mechanism fails. And one must be ready to meet this fact without panic, with firm confidence that there are no hopeless situations. How a grinder is arranged, what malfunctions can be, how to check the anchor of the electric motor, determine the cause of the breakdown and eliminate the problems? Knowing the device of the main components of the power tool will allow the master with their own hands to diagnose and repair the angular grinding machine.

Features of the asynchronous engine of the Bulgarian

In almost all electrical appliances used in everyday life, an asynchronous electric engine is used. An important advantage of this type of motor is that when the load on it changes, the speed does not change. This means that if, for example, for a long and without stopping, cut a stone with a household grinder, no external signs of engine overload will be noticeably. The speed of the disk rotation will be constant, the sound is plain. Only the temperature will change, but this can not be noticed if the hands are dressed in gloves.

The collector of the asynchronous engine is sensitive to overheating

With an inattentive attitude, the advantage may turn into a lack. Asynchronous engines are very sensitive to overheating, a significant excess of operating temperature entails melting insulation on the winding windings.

How To Use A Multimeter for Home Repairs and Troubleshooting

Initially, the motor will work with interruptions, and then. When an interval short circuit will occur. The engine will stop completely. It is worthwhile several times to overheat the engine of the grinder and, most likely, the anchor will melt.

In addition, contacts connecting the wires of the primary winding with the collector are soldered from high temperature, which leads to an interruption of electric current supply.

How to determine the malfunction of the armor of the grinder

Signs of breakdown of the anchor of the grinder are: increased sparking of brushes on the motor collector, vibration of the motor at low speeds, rotation of the working shaft in different directions. If such symptoms are present, the work should be stopped by the tool. This is dangerous. Suspicions are easy to check with simple tests.

Groschopp Tech Tips | How to Check for a Damaged Armature

Visual examination outside

The search for a malfunction should start with a visual inspection of the grinder:

  • Carry out a general inspection of the instrument.
  • Pay attention to the integrity of the network cord, the presence of voltage in the outlet.
  • Using the voltage indicator, make sure that the current enters the engine collector and start button.

The indicator check the integrity of the electrical circuit

Inspection from the inside

If everything is in order with food, but the grinder does not work, you have to open the body to access the motor. As a rule, disassembly is not difficult. But it is necessary to adhere to simple rules that will avoid trouble during the reverse assembly:

  • Be sure to turn off the device from the network before disassembly.
  • Remove a working disk and a protective casing from a spindle.
  • Open the case in a well.Lit place, on the clean surface of the table.
  • Remember the location of all parts and nodes before disassembly. It is recommended to draw or photograph the internal device of the device.
  • Screws and fastening screws fold in a separate place so that they do not get lost.
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It is best to inspect the motor under bright lighting, so that all small details are clearly distinguishable. The anchor should rotate around its axis freely, the correctly working bearings should not make a sound when working. There should be no traces of the melted wiring on the anchor, the winding of the circuit should be whole, without breaks. You can smell the rotor. With inter.Flip circuit, insulating varnish burns out and issues a stable specific smell. But for such a diagnosis, a certain experience is needed.

The chain calls by the tester

If the visual inspection has not given obvious results, it is recommended to continue the examination using a multimeter. Having set the switching switch of the modes to the Ommeter position (200 Ohms range), it is necessary to “call” two neighboring lamellas of anchors with two probes. If the resistance on all turns is the same, this means that the windings are working. If on some pairs a tester shows another resistance or a chain break, a malfunction in this coil.

A multimeter in the mode of resistance measurement mode check the integrity of the coils

Gap of wiring can occur between the winding and the core. Carefully examine the places of connection of the coils with the collector lamps in the bottom of the anchor, visually check the contact rations.

Checking contacts with a light bulb

If there is no tester, you can get out of the position using a simple 12 volt light bulb. Power can be any, optimally 30–40 watts. The voltage from the battery of 12 volts must be supplied to the fork of the grinder, inserting a light bulb into a rupture of one wire. With good anchor, if you rotate the spindle with your hand, the light should burn, without changing brightness. If the intensity changes, this is a sure sign of interitral short circuit.

If the light does not burn, then this may indicate the following:

  • It is possible to freeze the brushes in a non.Working position. A retaining spring worked.
  • There was a breakup of the supply circuit.
  • There was a short circuit or rupture in the stator winding.

There are other diagnostic methods, but they require more complex equipment that is usually not used at home. An experienced master will determine a breakdown with a high degree of accuracy using a “punch” or a simple transformer with a cut.Cut thoroidal core and one primary winding.

In what cases can you save the anchor and restore it with your own hands

If damage to the anchor is established with guaranteed accuracy, the part must be removed from the electric motor. The disassembly of the motor must be done with special accuracy, having previously removed the brushes and disconnecting the power terminals. The rotor is removed along with the supporting bearings and the impeller of the engine cooling, they make up a single whole with it.

Checking the grinder rotor with various methods

Some experience a non.Working tool with a tester. The correct solution to the problem is quite correct, but in this case this measuring device, unfortunately, can show us little.

You need to understand that the anchor of a small engine of a construction tool has a winding and a magnetic circuit where the rotation shaft is located. One end ends with the lead gear, the other collector with lamellas. The magnetic circuit has soft plates and grooves, which are covered with a special coating for insulation.

As the internal diagram of the rotor shows, in the grooves there are conductors of the anchor winding, there are two of them. Each of them is a half of the turns, the edges of which are connected in the lamellas of the greenhouse. In one groove there are: the first round (its beginning) and the last (end) that are closed on one lamella.

So, how the anchor of the grinder is checked? Rotor malfunctions can happen only in some cases and for the following reasons:

call, rotor, grinder, multimeter, tool
  • Cutting off.Conductors;
  • Interpretation circuit;
  • Formation of isolation. In this case, the winding on the metallic base of the anchor is obtained, in most cases the fault of such a breakdown is a violation of the insulating winding of the conductors;
  • Collapse of the collector output;
  • Unevenly worn out collector.

If the anchor is not working, this leads to overheating of the engine, which is why insulation protection is melted, the result is a short circuit of the turns. Next, there is an independent plowing of contacts that serve as a connecting to the winding of the rotor and the collector plates. The current ceases to be supplied and the engine engine does not function.

The stator of the grinder can also be the reason for the failure of the power tool.

Methods of verification and diagnosis

How to check the rotor of the grinder for performance? It is simply necessary to check the place of engine breakdown with its malfunction. After all, it is this procedure that will help to understand which part of the mechanism works and which is no longer. Diagnosis is carried out in several ways:

Sometimes even a visual inspection is enough to understand that there was a short circuit. In this case, the wires, where isolation will be melted, will be visible to the details in this case. It is also worth paying attention to the charred varnish or its smell after overheating of the engine.

Violation of contact also occurs due to the collection of dust (graphite from brushes) on the lamellas. It is not difficult to notice him, as well as clean the anchor from such finely dispersed garbage.

A device called “multimeter” also helps to install a breakdown of an electrical device. It is enough to set up the resistance of 200 ohms and put the probes on two nearby lamellas. The resistance between all plates will be the same with the normal functioning of the part. If the indicator is less than 1 ohma, then the case is the closure of the turns. Когда показатель больше единицы – это означает обрыв витков обмотки. The device can even go off the way, since the resistance in the latter case can be very great. Using an analog multimeter, the arrow will swing to the right to the very end, the digital measurement device will not show anything.

The multimeter, in fact, is the same tester that determines the resistance in the right places of power tools.

When there is no device to determine the resistance, you can use a simple 12 volt bulb and a power of 40 watts. Two wires attach to the light bulb. Where there will be a minus, you need to make a gap. Next, supply voltage. We apply the ends of the wire on the gap to the collector’s plates and scroll it. Когда при такой манипуляции лампочка горит без смены яркости, то замыкания нет.

Another verification method concerns the breakdown of current to the mass. To do this, we associate one wire with lamellas, and the second with iron anchor. After we carry out the same manipulation with the shaft. In case of violation of work in the part, the light will glow.

Any of the methods can be checked by the stator of the grinder, which can also be the cause of a breakdown or engine heating.

Indicator as a way to check the turns during short circuit

Manufacturers collect grinder in different ways, so some do not see the wires that join the collector. The insulation is well hidden under the bandage or opaque compound, and to check its serviceability, you can use the indicator of short.Closed turns. The device is easy to use and has small sizes.

To determine the closure, first diagnostics for the absence of breaks is carried out. To do this, you need a tester that will measure the resistance between the lamellas. The resistance indicator should not be higher than half, if so. That is, a break. When the norm is displayed on the monitor, we proceed to the next stage.

The resistance device has a sensitivity control function, which is also used to diagnose. We look at two bulbs and set up the tool so that red. We apply the indicator to the winding, while slowly twist the anchor. If the light is glowing, then this indicates a short circuit.

Throttle

The rotor diagnostics device helps to calculate the interitaic circuit of the winding. The throttle is a transformer with the presence of a primary winding and a cutout of a magnetic gap in the core.

When the anchor interacts (put in the gap) and the throttle, the winding works as a secondary, transformer. If, with the device and rotor on the metal plate on, the vibration or magnetic effect will be visible. There is a closure. Free movement of the plate along the turns indicates the complete serviceability of the anchor.

How to call the rotor grinder multimeter

To come in

Building in with the help of a third.Party service you accept the terms of the user agreement

What to do if you need remote access to the Mikrotik router, and you have a dynamic IP address, you can certainly use some kind of service for no ip, dyndns.But it is more convenient to use the built.In function that is present in this equipment, we are talking about the Cloud function. This function allows you to get remote access to the router with a dynamic IP address. Connection to the router will be carried out by serial equipment number, as a result you will get about such DNS name. SN.Mynetname.NET where the serial number of your equipment will be with stars and, on it you can connect to the router instead of IP addresses. I will note right away, we will perform all actions through the WinBox utility.

How to check rotor Bulgarians

Bulgarian. A construction tool used in cutting and processing the edges of various hard materials, such as stone, metal, wood, etc.D.

The rotor control is carried out in 2 ways-a preventive examination and the method of determining the premise of non-service, if the breakdown has already happened.

Methods of verification and diagnosis

How to inspect the rotor of the grinder for performance? It is simply necessary to check the place of breakdown of the motor with its malfunction. Because this very procedure will help to realize which part of the mechanism works and which is no longer. Diagnosis is carried out by several methods:

From time to time, even a visual inspection is enough to realize that Kutzue Close came out. In this case, for example, an unprotected winding, wires, where isolation will be visible to the details in this case. It is also worth paying attention to the charred varnish or its smell after overheating of the motor.

How to check the anchor of the grinder

Violation of contact also occurs due to the collection of dust (graphite from brushes) on the lamellas. It is easy to see him, as well as clean the anchor from such finely dispersed garbage.

call, rotor, grinder, multimeter, tool

Armiture checking easy way// how to check मिक्सर armature

The device under the title “Multimeter” also helps to install a breakdown of the electronic device. Quite tired of the resistance of 200 ohms and put the probes on two nearby lamellas. Resistance between all plates will be similar in the usual functioning of the part. If the indicator is less than 1 om. It means the case of the closure of the turns. Когда показатель больше единицы – это значит обрыв витков обмотки. The device can even go off the way, because the resistance in the latter case can be very great. With the introduction of an analog multimeter, the arrow will swing to the right to the very end, the digital measurement device will not show anything.

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The multimeter, in fact, is the same tester that determines the resistance in suitable places of power tools.

When there is no device to determine and calculate the resistance, you can use an ordinary light bulb of 12 volts and a power of 40 W. Two wires attach to the light bulb. Where there will be a minus, you need to make a gap. Next, we supply voltage. We apply the ends of the wire on the gap to the collector’s plates and scroll it. Когда при таковой манипуляции лампочка пылает без смены яркости, то замыкания нет.

Another method of checking the breakdown of current for the mass. To do this, we associate one wire with lamellas, and the 2nd with an iron iron. After we carry out the same manipulation with the shaft. In case of violation of work in the part, the light will shine.

At least any of the methods can be checked by the stator of the grinder, which can also be a prerequisite for the breakdown or heating of the motor.

Indicator as a way to check the turns during short circuit

Manufacturers collect grinders with various methods, therefore, there are no wires that join the collector in some. The insulation is perfectly hidden under the bandage or opaque compound, and to check its serviceability, you can use the indicator of short.Closed turns. The device is easy to use and has small sizes.

To find a closure, at first a diagnosis is carried out for the absence of cliffs. For this, a tester will come in handy, which will determine the resistance between the lamellas. The resistance indicator should not be higher than half, if so. In other words, a cliff. When the norm is displayed on the monitor, we run to the next step.

Three ways how to check the anchor and stator.

The resistance device has the function of regulating sensitivity, which is also used for diagnosis. We look at two bulbs and set up the tool so that the reddish is lit. We apply the indicator to the winding, with all this we slowly twist the anchor. If the light is shining, then this shows a closure on the kutser.

Methods of verification

Each rotor malfunction is revealed by the corresponding verification method.

Visual inspection

A method of verification with which you need to start diagnostics. Check the anchor collector for the presence of mechanical damage. Scratches, bullying and chips should be absent. Inspect the lamellas for burnout. If one of them is darker or fluttered, there is a short circuit between the plate and the winding tire.

12-volt light bulb

Connect two wires to the lamp contacts. In one of them make a gap. Connect the wires to the power source, put the edges of the “torn” wire on the lamellas so that they do not contact each other. Rotate anchor. If there are no holes in the winding, then the light will burn continuously.

Multimeter

Put this device into the resistance measurement mode. One of the probes (polarity does not matter) put on one of the plates. Another probe is alternately applied to the rest of the lamellas. The sound signal, depending on the multimeter model, will notify that there is a breakdown between the “winding tracks”.

Tester

Indicator of short.Closed turns. Used in the diagnosis of closed anchors. This type of rotor is characterized by the lack of access to the location of the winding with the lamellas. The tester has two LEDs. Red and green. Rotating the anchor connected to the tester, you can determine the presence of a breakdown in the winding on the tanned red LED.

How to eliminate the malfunction?

Visual inspection and conduct of tests will help determine the nature of the malfunction and understand whether replacement or repair is possible at home. Rotor malfunctions are divided into two types: amenable and not amenable. The first type includes malfunctions associated with violation of the insulation of the winding, damage to the collector and the iron base. The second type of breakdowns. Factors of deterioration of balancing the anchor in general and its shaft. It is almost impossible to restore the rotor in this case.

Collector repair

If structural damage to the collector lamella is detected, they must be proceeded. You can do this on a lathe or using improvised means. The groove should be carried out evenly. Otherwise, balancing will be violated, which will entail the destruction of graphite brushes during operation and failure of other nodes of the grinder.

Machine groove

The grinder rotor is installed in a lathe. Since the collector consists of copper plates, and copper is a viscous metal, it is necessary to choose the optimal rotation speed in the range from 600 to 1200. The cutting of the cutter is carried out half the division. At the time of touching the “knife” of the collector, a longitudinal passage is made with the removal of a thin layer of metal. To achieve the best effect, you can make 2-3 passes. Their larger number can lead to damage to the structural integrity of the collector. Between the aisles you need to take breaks, giving copper to cool. Otherwise, varnish isolation between the lamellas may melt.

For grooves with the help of improvised means you will need a vice, drill and several types of sandpaper. The anchor of the grinder is extracted from the body, while one part of it remains connected to the Ushm gearbox. The gearbox body is fixed in a vice, the other end of the rotor shaft is clamped in a drill cartridge. The “lips” of the vice and the drill should be on the same line with the axis of the anchor shaft.

Turn on the drill with fixing the start button in the mode of constant operation. Wipe the collector without pressure. Use at least 3 types of granularity. From larger to smaller. The final should be the sandpaper of zero granularity.

Remove the bearing

The edge that is fixed in the drill cartridge is initially installed in the bearing. Before the groove, it is necessary to remove it. In order to remove the bearing without a puller, you can use a vice, hammer and chisel. Fix the shaft with the bearing in the vice so that only the bearing is squeezed. Install the sharp end of the chisel in the end of the shaft and remove the shaft from the bearing with the light beats of the hammer.

Winding repair

Rewinding of an armature of a grinder. Work requiring the presence of appropriate skills and special accuracy. To achieve the best final result, you should contact the relevant specialist.

Rotor malfunctions

In the case of an optimal use mode, the rotor does not wear out. Regulatory work is carried out with the replacement of brushes with their wear. But over time, with strong loads, the stator heats up and the soil is formed. The most common mechanical breakdown is wear or bias of bearings.

The grinder will work, but the plates quickly wear out, and over time the engine breaks. To avoid breakdowns, it is necessary to check the tool and maintain normal service conditions.

Moisture when it hits metal causes rust. The friction force increases, the current strength is required more for work. There is a significant heating of the contact groups, solder, a strong spark appears.

Device

Ushm stator is fixed structure in the form of a core, made of sheet electrical steel. It has grooves in which it is placed winding, sweaty in a certain way, its wires are located parallel to each other, to reduce vortex currents.

408-316 Stator for Bosch GWS6-100/GWS6-115 Hammer. Photo 220 volts

Winding without fail It is covered with electrical insulating varnish In order to protect against a possible closure of wires to each other. In the grooves of the cores between the coils are laid electrocardon isolation, glasslands and other similar materials. In the vast majority of Bulgarian models The stator is tightly planted into the body made of high.Strength plastic, which is the protection of the entire electrical part of the Ushm.

When should not be checked anchor on one’s own

It is far from always worth trying to independently engage in testing anchors. The fact is that this is a rather difficult job. Therefore, people who have never done this before, it is better to call specialists.

Without theoretical knowledge and practical skills, you should not even try to disassemble the grinder. If you do it wrong, you can seriously damage the tool.

How to eliminate the malfunction?

Visual inspection and conduct of tests will help determine the nature of the malfunction and understand whether replacement or repair is possible at home. Rotor malfunctions are divided into two types: amenable and not amenable. The first type includes malfunctions associated with violation of the insulation of the winding, damage to the collector and the iron base. The second type of breakdowns. Factors of deterioration of balancing the anchor in general and its shaft. It is almost impossible to restore the rotor in this case.

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Collector repair

If structural damage to the collector lamella is detected, they must be proceeded. You can do this on a lathe or using improvised means. The groove should be carried out evenly. Otherwise, balancing will be violated, which will entail the destruction of graphite brushes during operation and failure of other nodes of the grinder.

Machine groove

The grinder rotor is installed in a lathe. Since the collector consists of copper plates, and copper is a viscous metal, it is necessary to choose the optimal rotation speed in the range from 600 to 1200. The cutting of the cutter is carried out half the division. At the time of touching the “knife” of the collector, a longitudinal passage is made with the removal of a thin layer of metal. To achieve the best effect, you can make 2-3 passes. Their larger number can lead to damage to the structural integrity of the collector. Between the aisles you need to take breaks, giving copper to cool. Otherwise, varnish isolation between the lamellas may melt.

For grooves with the help of improvised means you will need a vice, drill and several types of sandpaper. The anchor of the grinder is extracted from the body, while one part of it remains connected to the Ushm gearbox. The gearbox body is fixed in a vice, the other end of the rotor shaft is clamped in a drill cartridge. The “lips” of the vice and the drill should be on the same line with the axis of the anchor shaft.

Turn on the drill with fixing the start button in the mode of constant operation. Wipe the collector without pressure. Use at least 3 types of granularity. From larger to smaller. The final should be the sandpaper of zero granularity.

Remove the bearing

The edge that is fixed in the drill cartridge is initially installed in the bearing. Before the groove, it is necessary to remove it. In order to remove the bearing without a puller, you can use a vice, a hammer and a chisel. Fix the shaft with the bearing in the vice so that only the bearing is squeezed. Install the sharp end of the chisel in the end of the shaft and remove the shaft from the bearing with the light beats of the hammer.

Winding repair

Rewinding of an armature of a grinder. Work requiring the presence of appropriate skills and special accuracy. To achieve the best final result, you should contact the relevant specialist.