How to check the punch stator by multimeter. Third method: frozen voltage drops with a voltmeter

Table of Contents:

How to check the punch stator by multimeter

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.

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. 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.

Visual inspection

A malfunction can be detected with uneven heating of the tool body. Touching your hand, you feel the temperature difference in different places of the case. In this case, the tool must be disassembled and checked by the tester and other methods.

In case of short circuit of stator turns and the search for malfunctions, we are primarily inspection of the turns and conclusions. As a rule, when closed, the current force passing through the windings increases, and their overheating occurs.

There is a greater short circuit in the stator windings and the insulation layer is damaged. Therefore, we begin to determine the malfunctions of a visual inspection. If there are no burns and damaged isolation, then we proceed to the following stage.

Perhaps the cause of the breakdown of the voltage regulator that occurs with an increase in excitation currents. To detect the problem, brushes are checked, they must be extended evenly and not have chips and damage. Then you should check with a light bulb and 2 batteries.

Как правильно ИСПЫТАТЬ АЛЬТЕРНАТОР

Application of a multimeter

Now we need to check the possibility of a break in the stator windings. On the multimeter scale, set the switch to the resistance measurement sector. Without knowing the size of the measurement, we set the maximum value for your device. We check the performance of the tester.

Touch each other’s probes. The arrow of the device should show 0. We carry out work, touching the conclusions of the windings. When indicating an endless value on the multimeter scale, the winding is faulty and the stator should be put into rewind.

We check the possibility of short circuit on the case. Such a malfunction will cause a decrease in the power of the grinder, the possibility of electricity damage and an increase in temperature, when operating. Work is carried out according to the same scheme. Turn on the resistance on the scale.

We have a red probe at the output output, the black probe is attached to the stator case. With a short circuit circuit, the resistance value will be smaller than on good. This malfunction requires rewinding the stator windings.

It is time to take measurements and check if there is an interval closing of the stator winding. For this, the resistance value on each winding is measured.

We determine the zero point of windings, measuring the resistance for each of them. When indicating on the device the least resistance of the winding, it should be changed.

We repair the drill on our own, the main types of breakdowns and their elimination

One of the main tools used in construction and repair is the electric drill. What is it, even children know, but few of the owners of this tool can repair it. Breakage happens to all tools, and if a drill breaks, then its repair can be done independently with your own hands. The step.By.Step description of not only repairs, but also the diagnosis of a drill is described in the material.

Electrodegol. Recall the design of the tool

An electric drill is the type of tool that is designed to drill different types of materials, including concrete and reinforced concrete. Only for this you will need to use a tool with shock drilling or shock drill. How the tool works, you can find out if you make it out. Briefly about the design of the electrode of Soviet and foreign production, described below.

It should be noted that the design of modern drills of domestic and foreign production differs from the device of Soviet tools. Only these are insignificant differences that are the absence of a reverse on electric drill, as well as shock drilling. So, structurally, the electric drill consists of two main parts. Electrical and mechanical. The mechanical part is based on the following structural elements:

  • Reducer. A set of gears, due to which a decrease in speed and an increase in the force of the moment from the shaft of the electric motor are
  • Cartridge. An executive body that is designed to consolidate the working nozzles
  • Bearings. Supporting mechanisms of shafts and axes that provide their rotation
  • Shock mechanism. In electrical shock drones, this device is part of the gearbox

The electric component of any network electric drill consists of the following elements:

  • A collector.Type engine consisting of a stator (motionless part), a rotor or anchor (mobile part) and a collector (copper plates or lamellas, along which the current is supplied to the anchor winding)
  • Graphite or coal brushes. A transfer device through which the current is transferred to the rotor winding. Brushes are consumables, and when they spark, this speaks of their wear
  • Start button. Depending on the model of an electric drill, switches are ordinary and with a built.In speed controller
  • The reverse button. There are no such devices on Soviet drills. This is a mechanism for a change in polarity, through which there is a change in the direction of rotation of the tool cartridge. Installed separately or integrated into the start button
  • The ferrite ring is an element (filter) through which interference in the network occurs
  • Capacitor. A filtering element that does not allow interference to the network
  • Network wire. A link between an electric outlet and a tool

Above the photo shows the design of the drill with the main nodes. Sooner or later, there is a need to repair a drill due to the failure of its individual components and mechanisms. For this, it is necessary to initially inspect the tool, identify the cause of the malfunction, and eliminate it. In more detail about what types of drifts of drills are, how to identify and eliminate them, described in the material.

!On old Soviet drills, there is no reverse mechanism and electronic revolutions. Instead of an electronic regulator, a mechanical one is used, consisting of gears of different diameters and the number of teeth. This method of adjustment is more reliable, since lowering speed does not affect power. However, this method of speed adjustment is expensive, as it requires the additional use of a pair of gears. With the wear of one pair of gears, you can continue to use the tool. Below are a photo in which the design of the mechanical speed controller of the old Soviet drill is visible.

What will be needed to diagnose breakdowns of an electric drill

Where to start searching for a malfunction of the electrode? Of course, from the first signs, by which it becomes clear where the breakdown is hidden, and which part needs repair. It is easy to identify the mechanical malfunctions of the drill, but with the electric part everything is much more complicated. Here you need appropriate tools for which we can draw conclusions about the malfunction of certain nodes, details and mechanisms of the tool. To identify breakdowns in the electric part of the electric drill, you will need to prepare the following tools:

  • Voltmeter or multimeter. Preference should be given to the second option, since it is more effective and multifunctional
  • A device for measuring interitral short circuit in anchor

To diagnose the mechanical part, you will need to perform the following manipulations:

  • See what specific function the drill does not perform
  • Inspect the integrity of the gearbox, having previously disassembled the tool body
  • Inspect the serviceability of the bearings, since often these devices fail in the absence of a lubricant
  • Identify the service of the mode switch. If the device jams or fails, then the tool will only work in one mode
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In a drill, like any other type of power tool, different details and mechanisms come out of order. The whole drill cannot break completely, but in any case, even when the mode switch is faulty, the operator will not be able to use the tool in all its performance.

That is why it is necessary to learn how to repair the drill with your own hands. It is not at all difficult to do, even if you have no experience. Therefore, you should not buy a new tool at the first malfunction, since the malfunction is sometimes easy to eliminate even without the need to replace parts.

What types of breakdowns arise, how to eliminate them and what to do for this is described in detail in the publication.

Where to look for a breakdown in the electric part of the most common malfunctions and their elimination

Electric malfunctions are the most complex not only to identify, but also to eliminate. This is due to the fact that it is impossible to see the principle of electric current, but you can understand how the drill works. Based on the principle of operation of the electric part, you can draw the appropriate conclusions about possible faults. The principle of operation of the electric part of the drill is as follows:

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.

Broken Electric Motor? HOW TO Test If A Motor Armature With Commutator Is Damaged #ElectricMotor

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.

How to check the rotor of the grinder by multimeter

As Shakespeare said: “Nothing forever under the moon”. Unfortunately, household appliances are no exception. It happens that even the most reliable mechanism fails. And we must be ready to meet this fact without panic, with a firm conviction that there are no hopeless situations. How a grinding machine works, which can be a malfunction, how to check the engine reinforcement, determine the cause of the malfunction and eliminate the malfunction? Knowing the design of the main components of the power tool will allow the master to diagnose and repair the corner grinding machine with his own hands.

Features of the asynchronous engine grinder

In almost all electrical appliances used at home, an asynchronous engine is used. An important advantage of this type of engine is that when loading it changes rotation speed. This means that, for example, if you cut a stone for a long time and do not stop on a household crusher, there will be no obvious external signs of engine overload. The speed of the disk rotation will be constant, the sound is even. Only the temperature will change, but you may not notice this if your hands are gloves on your hands.

check, punch, stator, multimeter

Inattention may be disadvantageous. Asynchronous engines are very sensitive to overheating, a significant excess of operating temperature causes melting of insulation on the winding windings. First, the engine will work with interruptions, and then. Когда произойдет короткое замыкание на повороте. The engine will stop completely. It is required several times to overheat the Bulgarian engine and, most likely, the anchor will melt. In addition, the contacts connecting the wires of the primary winding with the collector are soldered to high temperatures, which leads to a power outage.

How to determine the malfunction of the Bulgarian anchor

Signs of breakdown of the Bulgarian anchor are: increased sparking of brushes on the engine manifold, engine vibration at low speeds, rotation of the working shaft in different directions. If there are such symptoms, the use of the tool should be stopped. It is dangerous. Suspicions are easy to check with simple tests.

Visual examination outside

The elimination of malfunctions should begin with a visual inspection of the mill:

  • View the tool.
  • Pay attention to the integrity of the power cord, the presence of voltage in the outlet.
  • Use the voltage indicator to make sure that the current flows into the engine collector and launch button.

Review of the device from the inside

If the power source is in order, but the coffee grinder does not work, you will need to open the case to access the engine. As a rule, disassembly is not complicated. But you must follow the simple rules that will help you avoid re.Assembly hassle:

  • Before disassembling the device, be sure to turn off the device from the network.
  • Remove the working disk and the protective cover from the spindle.
  • Open the closet 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 paint or photograph the internal structure of the device.
  • Place the screws and fasteners in a separate place so that they do not get lost.

The engine examination is best carried out in bright light, so that all small details are clearly visible. The anchor should freely rotate around its axis, correctly working bearings should not make sound during operation. There should be no traces of molten wiring on the anchor, the circuit windings should be whole, without breaks. You can smell the rotor. During the closing of an interruption, the insulating varnish burns and makes a constant specific smell. But such a diagnosis requires a certain experience.

Tester of the chain

If a visual inspection does not give obvious results, it is recommended to continue from the multimeter. Having set the toggle switch to the ohmmeter position (200 Ohms range), it is necessary to “call” two neighboring anchor rails with two probes. If the resistance at all speeds is the same, this means that the windings work. If the tester detects a different resistance or a chain break on some pairs, this coil is faulty.

Between the winding and the core, the wiring rupture may occur. It is necessary to carefully examine the joints of the coils with the collector’s plates in the lower part of the valve, visually check the contact rations.

How to check the rotor of the grinder with a multimeter

If the tester is gone, you can get out of the situation with a simple 12-volt lamp. There can be any power, optimally 30-40 watts. The voltage from the 12-volt battery should be applied to the Bulgarian fork, inserting the light bulb into the gap of one wire. Using an anchor if you rotate the spindle manually, the light should light up without a change in brightness. If the glow changes, this is a sure sign of short circuit.

If the indicator does not burn, this may mean the following:

  • You can hang brushes in a non.Working position. The supporting spring worked.
  • There was a gap in the power chain.
  • 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 detect a malfunction with a high degree of accuracy using a punch or simple transformer with a carved thoroidal core and one primary winding.

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

If damage to the valve is set with guaranteed accuracy, the part must be removed from the engine. After removing the brushes and disconnecting power terminals, the engine must be disassembled with particular caution. The rotor is removed along with the stubborn bearings and the coolant of the engine, forming a single whole with it.

If most of the wiring is damaged by the anchor, and the balance is disturbed as a result of overheating, it is better to replace it completely. The imbalance indicates increased vibration and uneven hum during the operation of the mechanism.

How to rewind the anchor. Step-by-step instruction

If the balance of the anchor is not violated and the problem is only in damaged windings, the anchor can be restored independently by rewinding the coils. Ringing the rotor at home requires great patience and accuracy.

Electric motors. Device, types

Regardless of the characteristics of various engines, their main structural parts differ little:

  • In the case of any engine, a stator is fixed, which is similar to a sleeve consisting of one and several windings (like a transformer);
  • Inside the stator, the rotor rotates on two bearings, which is a cylinder made of sheets of electromechanical steel.

Based on the principal device, the engines can be divided into 4 types:

  • Collector, which operate on direct current, are most often used in automobile electrical equipment.
  • Collector operating from AC networks. For the most part, they are used in manual power tools.
  • Asynchronous one- or two-phase condenser units. Used in the manufacture of household appliances and operate from a network with a voltage of 220 V.
  • Asynchronous three.Phase, operating from a network with a voltage of 380 in. It is these that work in all industrial units.
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In everyday life, most often you have to deal with breakdowns of single.Phase engines, which are equipped with home appliances. Therefore, every home master should know how to check the failed motor.

Visual inspection

A malfunction can be detected with uneven heating of the tool body. Touching your hand, you feel the temperature difference in different places of the case. In this case, the tool must be disassembled and check his tester and other ways.

In case of short circuit of stator turns and the search for malfunctions, we are primarily inspection of the turns and conclusions. As a rule, when closed, the current force passing through the windings increases, and their overheating occurs.

There is a greater short circuit in the stator windings and the insulation layer is damaged. Therefore, we begin to determine the malfunctions of a visual inspection. If there are no burns and damaged isolation, then we proceed to the following stage.

Perhaps the cause of the breakdown of the voltage regulator that occurs with an increase in excitation currents. To detect the problem, brushes are checked, they must be extended evenly and not have chips and damage. Then you should check with a light bulb and 2 batteries.

How to check the stator grinder multimeter

Checking the stator and rotor to break the multimeter chain will not take much time. Dismantling the engine will take more time. Grinding machine, drill, punch. Each tool can be repaired to identify a malfunction. It is better to divide the check into several main steps and take slow steps sequentially.

Dismantling meat grinder

To check a short circuit at the stature and rotor, it is necessary to disassemble the engine of the household tool. Try to perform this operation to eliminate the malfunction of the meat grinder.

Remove the protective cover by unscrewing one screw on the clamp;

After disassembling and disconnecting the parts necessary for verification, we move on to their external review, checking the presence of blocking.

Visual inspection

The malfunction can be detected by uneven heating of the tool body. When you touch your hands, you can feel the difference in temperature in different places. In this case, the device must be disassembled and tested by the tester and other methods.

In the case of a short circuit of the stator and the elimination of malfunctions, first of all, we are checking the revolutions and conclusions. As a rule, when closed, the current flowing through the windings increases and their overheating occurs.

In the stator windings, there is more location of the turns and the insulation layer is damaged. This is why we begin problems with visual inspection. If there are no burns and damaged insulation, go to the next step.

The malfunction can be caused by a malfunction in the voltage regulator, which occurs with an increase in excitation currents. To identify the problem, the brushes are checked, they need to be sharpened evenly and not have chips and damage. Then check the light bulb and 2 batteries.

Special inspection

The most accurate way is to check the stator using a metal ball and a current transformer down. The stator is connected to the terminals of three phases from the transformer. Having made sure of the correct connection, we turn on our low.Voltage network.

We throw the ball into the stator and follow its behavior. If he is “glued” to one of the windings, this means that he is torn. The ball rotates in a circle. The stator works. Quite an unscientific, but effective method for detecting the inclusion of the stator.

How to correctly determine the malfunction of the Rotor stator rotor and select brushes

Any power tool will eventually begin to fail. Malfunctions are divided into mechanical and electrical. Electric malfunctions are the most common malfunctions associated with the brush breakdown. In second place: failure of anchor bearings. Refusals associated with the failure of the stator or rotor occur less often. How to fix the stator, the rotor of the hammer Makita 2450 and 2070, replace the brushes? And here Makita 2450, 2470 schemes will help us.

How to repair or replace Makita 2450 and 2470 perforators

Replacing brushes with a rotating hammer indicates increased sparking in the rotary manifold area, the smell of combustion and heating the holders of the brushes. For a new or renovated perforator, a spark under the brushes is flat, constant length, and there is no separation of sparks in the circle. Bearing wear, damage to the insulation of the rotor or stator clearly indicates a spark in the entire collector. The appearance of sparks of these types indicates the burning of the collector plates, failure of the rotor or stator.

How to remove an electric brush Makita

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

To replace coal brushes poses.65 They must be achieved. The back cover should be removed from the perforator; Fixed with three screws.

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

Remember! With prolonged use of the tool, it is forbidden to reduce the length of the working part of the brushes from the nominal by 1/3 (approximately 8 mm). When one brush wears out, both must be replaced.

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

How to make brushes yourself?

The cheapest way to choose electric brushes. This use other power tools, grinding them to the desired size using a conventional file. It is economical, but they will be cheaper than originals. It is possible to adjust the carbon core of the battery or other elements as an option.

Checking the stator of the grinder for interval closing video

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

check, punch, stator, multimeter
  • 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.

Visual inspection

A malfunction can be detected with uneven heating of the tool body. Touching your hand, you feel the temperature difference in different places of the case. In this case, the tool must be disassembled and checked by the tester and other methods.

In case of short circuit of stator turns and the search for malfunctions, we are primarily inspection of the turns and conclusions. As a rule, when closed, the current force passing through the windings increases, and their overheating occurs.

There is a greater short circuit in the stator windings and the insulation layer is damaged. Therefore, we begin to determine the malfunctions of a visual inspection. If there are no burns and damaged isolation, then we proceed to the following stage.

Perhaps the cause of the breakdown of the voltage regulator that occurs with an increase in excitation currents. To detect the problem, brushes are checked, they must be extended evenly and not have chips and damage. Then you should check with a light bulb and 2 batteries.

Finding malfunctions of the rotor and stator punch Makita

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.

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. 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.

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.
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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.

How to check the stator drills by 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.

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 principle of operation of the indicator is based on inducing an impulse electric motor in the verified winding. In the presence of short.Closed turns, a magnetic field is recorded from a short circuit current flowing on them.

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.

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.
check, punch, stator, multimeter

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.

check, punch, stator, multimeter

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.

How to check the punch stator by multimeter

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Power tools, drills, grinder, perforators, etc.D. Characteristics “”

Sparkle the engine brushes of the power tool

One. Malfunction: The brushes sparkle, does not develop momentum to full power, does not periodically turn on (after the impact begins to work), the consumption current is not overestimated. Diagnostic result: The capacitor is working, an anchor in appearance is whole, the stator windings are working in appearance. The resistance when comparing the spirit of the windings is the same, the brushes are worn by 60%. Work verification: During operation of the engine using the screwdriver (attention the handle should be a dielectric), carefully press the brushes to the anchor, as a result, the engine begins to work at full power (the speed increased). Repair: We change the brushes to new ones, if this is not enough, then we make replacement of the springs of the brush holders.

Malfunction: Sparking both brushes, does not develop momentum to full power. Repair:. Cleaning the collector with sandpaper “Nulevka” (using the pads) in the direction of rotation of the anchor, after which the dielectric gaskets between the collector plates, the cutter (preferably on a turning machine) are cut. In extreme cases, use the drill to clean the collector’s anchor, click on its cartridge and evenly lean the knot to the cigarette If you have a “branded” punch, then the cause of sparking can be in the installation of “non.Native” brushes If both brushes sparkle strongly, the winding of the anchor heats up. The anchor, an interval closure burned out the most quick, burned down.

Malfunction: Only one brush sparkles, it is possible that your punber has burned out a stator. Repair: The stator can be checked at home. Measure the resistance of the windings by the tester, usually 4 ohma, if the resistance of both windings is the same, then the stator is working, if different, it means to rewind the stator winding.

The Best Way to Perform a Voltage Drop Test

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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.