How to wind the anchor of corner grinding. Change of anchor

Detailed scheme of the anchors on the corner grinder

The first two and a half “pancake”. lump. Began to wind along another (symmetrical, above scheme), considering. that there is a picture of unwinding the last coil, and the first should dangle in the opposite direction. Shook a wire from a swing loop. But, it was easy to dissolve with a loop, it was necessary to make a carousel and began to unravel to two coils). Well, and about two times the same turned out, then I decided to wind two.ended with two ends with two separate wires. In general, it is not clear what the brains were busy (patience and perseverance. never my virtues), but he wound the calves that. and in the number of turns in half.views and in grooves and even one lamel rolled up one lamel. Did not even plow the wires to the lamella, but immediately unwound. The second time I decided. that for the first rewinding of the anchor, you still need to start the simplest consistent winding. But even here it was not without incidents almost the same. In the second case, I decided to all the same without impregnation and connect. Checked with reduced nutrition through trance (36 V). Nothing spun.

cases as a transformer. Only the anchor was sticking to the stature. Changing the polarity of connecting brushes. also did not give anything. If we do not consider that when turning on in different positions of the rotor, it still turns to a certain angle, but at different positions. spins in different directions. I rewound the same wire (the places are exposed for wandering to the lamella was insulated with masking tape). I tried to be as attentive as possible, but I’m afraid. that it is not given to me. Although, I hope. what is as much as possible this time. I wrapped it everywhere not 15 turns of the half.look. And 14-16. But this time nothing was spun and even a change in the polarity of the brushes and the position of the anchor did not affect at all. Finally, I decided to play the position of brushes relative to the collector lamellas, in order to find out whether it was deaf or may not be the “ignition ahead” and the no shift and the direction of winding. Oddly enough. everything spun in the position of the vehicles of 80 degrees of the nominal position. Truth. it also spun in the reverse from the right side. Now the dilemma is to come up with how to fix the brushes in a working position or rewind with a new (or rather other) wire according to another scheme.(the one that was originally gathering. and not mirrateded (committed in this message).

Anchor device

The anchor of the corner grinder consists of a winding that conducts a current, and a magnetic circuit. In the magnetic circuit there is a shaft that steal. The design of the magnetic wire is formed with plates and grooves, which are insulated among themselves by coating varnish. A certain sequence of laying the anchor winding conductors in the grooves has been developed. The conductors form a turn. Its ending is binded on the lamella. The arrangement of the beginning of the starting round and the end of the latter is compiled in such a way that they are closed on one lamella.

With constant overheating of the angular grinder motor, the anchor is melted. As a result of high temperature, the contacts of the wires may disappear, which connect the primary winding to the collector. All this leads to the fact that the current is not supplied.

How to determine the malfunction of the anchor of the corner grind

Signs of breakdown of the anchor of the angular grinding of the coat 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.

Visual examination outside

The search for a malfunction should start with a visual inspection of the corner 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.

Inspection from the inside

If everything is in order with food, but the corner grinder does not work, you will 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.

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.

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 corner grinder, inserting a light bulb into the gap 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.

Read also: Lobzik for cutting down

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.

Diagnosis of the electric part angular grind

As mentioned above, most often the angular grinder refuses to work due to the breakdown of the electrical part of the unit. For the correct diagnosis of electrical circuits of the tool, the wizards for the repair of electrical equipment are used by a special device. a tester.

If you pressed the assembly button, and it does not work, then in 90% of cases the cause of the breakdown is not so serious that you cannot repair the angular grinder with your own hands.

First of all, it will take a check of an electric cable and a fork at its end. If it is collapsible, then spin it and check the reliability of the contacts. Otherwise, you will have to disassemble the angular grinder (remove the casing of the device) and “call” the cable by the tester, and also make sure that the current is suitable for the “Start” button contacts. If the device shows a break, then the cable should be replaced with a new.

The situation when the current enters the button, but does not go further (when the position is turned on), indicates a malfunction of the switch. The button cannot be repaired. It must be replaced with a new one, but first march the contacts removed in order to connect them correctly in the future. When the contacts are incorrectly connected, the engine winding may burn out.

If when checking it turned out that both the cable and the start button are working, but the current does not enter the brushes, then it is necessary to clean the contact plates of the brush holders. In case of ineffectiveness of this procedure, it is recommended to replace the brushes. Further, if everything is fine with the brushes, and the current comes to them, you should check the rotor and the stator for the presence of circuits and cliffs.

Checking the anchor of the electric motor

The electric motor rotor may have the following malfunctions: inter.seal circuits and wiring at the lamella contacts. You can check the anchor of the corner grinder with a multimeter: the device is converted into the mode of change in resistance, the value of 200 Ohms is set, and the resistance between two neighboring lamellases is measured using probes. Thus, it is required to check all pairs of lamellas. If the resistance indicators are the same, then the rotor winding has no damage. Detection of other resistance values ​​during the “rang”, as well as the identification of a chain cliff indicates a malfunction in this coil. In this case, it will require repair of the anchor of the corner grinder.

If you do not have a measuring device, then you can check the rotor by using a 12 V light bulb for these purposes and the battery. Power should be in the range of 30-40 watts. The verification is done as follows: supply voltage 12 V from the battery to the corner grinder fork, connect the light bulb in the rupture of one wire, start rotating the corner grind. With a good winding, the light bulb will burn evenly, without blinking. With an interval circuit, the degree of intensity of a spiral of the bulb will change. In this case, the repair of the anchor of the corner grinder with your own hands will be difficult, since the winding scheme is quite complicated, and the process itself requires special equipment and knowledge. Therefore, this operation is recommended to entrust to specialists. But the best way out of the situation will be to replace the anchor on the corner grinding of a new.

If the bulb does not light up when testing the rotor, this indicates the presence of a cliff in the stature or closing in its windings, as well as problems with electrographs.

Checking the electric motor stator

To check the stator of the corner grinder, the multimeter is used, as in the previous case. Values ​​need to be set at 20-200 Ohms and make the following. Touch one probe to the contact of the stator winding, and the second. to the part of the part. If the device shows resistance, this means that a breakdown on the case occurred. Touch the probes to the contacts of one winding, and then to the contacts of another. If the resistance is the same, then the coils are serviceable. If on one winding the device shows a chain break, then it will require a rewinding of a stator or replacing a part with a new.

Rewind the stator at home, without special knowledge, skills and equipment, it will be problematic. It is better to contact specialists professionally engaged in engine rewinds.

How to check the anchor of the corner 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.

Sailing & Boating Lessons. anchoring one anchor

How to repair anchor at home

A third of the screwdriver of the screwdriver occurs due to the anchor. With everyday intensive mode of operation, malfunctions can occur already in the first six months, for example, with untimely replacement of brushes. With sparing use, the screwdriver will last a year or more.

The anchor can be saved if the balancing is not broken. If during operation of the device an intermittent hum is heard and there is a strong vibration, then this is a violation of balancing. Such an anchor should be replaced. And you can repair the winding and the collector. Small short circuits are eliminated. If a significant part of the winding is damaged, it can be rewound. Worn and severely damaged lamellas to pave, build up or solder. In addition, you should not take on the repair of the anchor if you are uncertain in your capabilities. It is better to replace it or take it to the workshop.

Collector groove

Over time, the collector is formed from the brushes. To get rid of it, you need:

  • Protect the collector using incisor cutting incisors, that is, passing incisors.
  • We also need a reverse cone for centering in the bearing. Make a hole in it up to 8 mm.
  • Since copper is viscous, adjust the machine to the number of revolutions from 600 to 1500 per minute.
  • Primary supply of half the division. When the cutter slightly touches the product, make a longitudinal groove of the entire collector. By the formed shiny pattern, you will see the condition of the lamellas, all the uneven surfaces.
  • If the collector is even, then the groove will be uniform.
  • If there are holes, then continue the groove until the surface is leveled.
  • For the last pass, you need to file a cutter by one fourth from division.
  • For polishing, take sandpaper with a thousandth grain and turn on the machine so that the anchor rotates in the direction in which it rotates during operation.

Do not forget to clean the rotor from the chips so that there is no closure.

Nadfil, without damaging the filler filler, remove the residues of the impregnation. Count the guides in the groove. Calculate the number of turns in the section and measure the diameter of the wire. Draw a diagram. Cut the sleeve from cardboard for insulation and insert them into the grooves.

After winding, weld the conclusions of sections with collector cocks. Now check the winding by the tester and the short circuit indicator. Get the impregnation.

Instructions for impregnation (taking into account the regulator of the number of revolutions)

  • After making sure there are no problems, send anchor to the electrical admission to heated for better epoxy resin.
  • After warming up, put an anchor on the table under an angle for better spreading on the wires. Drip with resin on the frontal part and slowly twist the anchor. Drip before the adhesive on the opposite frontal part.
  • Place the anchor horizontally and drip on both frontal parts. Twist the anchor to the loss of fluidity.
  • Leave in an upright position until complete polymerization.

At the end of the process, slightly set the collector. Balanced the anchor using dynamic balancing and corner grinder. Now put it finally on the bearing. It is necessary to clean the grooves between the lamellas and polish the collector. Make a final check for cliffs and closing.

The peculiarity of the winding for Bulgarians with an adjustable number of revolutions is that the rotor is wound with a power supply. Current density affects the number of revolutions. The cross.section of the wire is overstated, and the number of turns is underestimated.

Turning the electric motor with your own hands at home from professionals

The technique is often subjected to overload and mechanical damage. It is worth dropping only once or spilling something onto the tool, as a rust appears on the rotor winding, and the anchor itself shifts. The consequences are deplorable: the electric motor overheating, sparkles and vibrates. Working with such a tool is dangerous.

If you have the skills of repairing equipment and a minimum set of tools, then rewinding the anchor at home will help to eliminate the malfunction. The fact is that it is the winding that takes on the first “blows” of improper operation. The veins of the conductor are torn and burned. Their replacement will extend the life of technology and increase engine performance.

How to rewind the electric motor anchor at home

Before starting repair, prepare tools and materials:

  • Multimeter. If it is not there, then the voltage indicator, a megammeter and a 12 V bulb with a capacity of 30–40 watts will be needed;
  • A new winding. The diameter of the core should be identical to the diameter of the old winding;
  • soldering iron;
  • dielectric cardboard 0.3 mm thick;
  • varnish or epoxy resin;
  • a skein of thick cotton threads;
  • sandpaper.
wind, anchor, corner, grinding

In order not to do extra work, it is important to correctly identify the cause of the breakdown of the equipment. To do this, inspect the tool and check whether the current comes to the collector and start button using a multimeter or indicator. If everything is in order, then you need to inspect the device from the inside.

Engine diagnosis

Disconnect the tool from power, and disassemble the case. Smel the rotor. If an interwoven short circuit has occurred, then the insulating coating is melted and exudes a pungent smell.

Когда внешних признаков неисправности нет, стоит проверить ламели якоря мультиметром. Switch the device into an ohmmeter mode, and set the range of 200 Ohms. Two probes “call” neighboring lamellas. The change of resistance indicates a breakdown in the coil.

Ommeter can be replaced with a light bulb. Connect the plus and minus terminals to the fork fork, and put the lamp in the gap. Rotate the anchor shaft with your hand. If the light is “blinking”, then there is an interval closing. The lamp does not burn? So, there was a cliff of the chain or there is no resistance in one of the lamellas.

Replacement of the inspection and new isolation prevent engine burning. To extend the service life of the electric motor, the rotor rewinding is recommended at least once every two years.

Instructions: how to rewind the anchor winding

Before rewinding, you need to fix the main engine performance. Calculate and write down: the number of grooves of the anchor and the collector lamellas. Determine the winding step. The most common step is 1–6. when the coil is laid in the initial groove, then at 7 and is fixed to 1 groove.

Some factory windings use discharge to the right or left. For example, when winding and discharge to the right, the coil leaves to the right from the initial groove.

So, with the number of grooves of the anchor 12, the step of winding 1–6 and the discharge to the right, the winding is laid in 1 groove, then in 8 and after winding the required number of turns, is fixed in the 2nd plan. All this needs to be taken into account.

Otherwise, the winding will be laid incorrectly, which will negatively affect the direction of rotation.

Ringing the anchor of the electric motor with your own hands will take about 4 hours. So that there are no difficulties during assembly, it is recommended to photograph the initial location of the parts during each stage of work:

  • Determination of the direction and initial groove of the winding. Find a coil on the winding that is not blocked by others. This is the last coil. If laying the winding goes to the right, then the initial groove is located to the right of the left side of the last coil. From it you need to start laying the conductor. So the rewinding of the anchor will be as close as possible to the factory conditions. Mark the groove by a marker. With the initial symmetric winding, the coils are laid in pairs, so the last coils and initial grooves are also two. They also reveal them. So that the search for grooves does not cause difficulties, pay attention to the image:
  • Counting turns. It is necessary to determine the number of turns into the groove (w) and in the reel of the winding (k). Separate the upper coil and calculate the turns. If necessary, the coil is burned in the flame of the burner. The nuance of the counting is that the number of turns of a separate coil in the groove depends on the ratio of the number of lamelons of the collector to the number of grooves of the anchor. For example, in the last coil of 60 turns (W), in the anchor of 12 grooves, and the collector lamella 36. Then the value K will be 10 (606), where 6 is the ratio of the grooves to the lamella, multiplied by 2.
  • Preparation of the collector. You do not need to remove it. Measure the resistance between lamellas and body. To do this, use a megammeter or translate the multimeter into the appropriate mode. Minimum resistance. 200 kOhm, maximum. 0.25 MOM.
  • Dismantling the old conductor. Neatly, without damaging the anchor body, remove the old winding.
  • Stripping grooves and anchor body. All the corporal and burrs, you need to polish with sandpaper.
  • Making sleeve for anchor. From dielectric cardboard, cut the rectangles in accordance with the size of the anchor grooves.
  • Rewinding. Carefully view all the notes made in preparation for repair. With your own hands, rewinding the anchor rewriting should fully comply with the factory. The end of the new winding is soldered to the end of the lamella. The wire must be laid from the initial groove, observing the step and reset the winding.
  • Fixing. Tightly wind up a few turns of hb threads on the winding near the collector to fix the coils. Synthetic threads cannot be used. they are melted.
  • Checking circuits. As in diagnosis, check the winding for the presence of cliffs and inter.flip circuits.
  • Treatment. If the check has not detected malfunctions, then cover the winding with varnish or epoxy resin and dry. To accelerate the process, you can anchor into a regular oven for 20 hours at a temperature of 80 degrees.

Checking, repairing and replacing the anchor of the corner grind

Wonderful rotor for Bosch angular grinder GWS6-100/GWS 850 Max. Photo 220 volts

Rotor is one of the most complex structural elements of a corner grinder. At the same time is in a constant rotating state, which creates additional problems in maintaining the normal conditions of its operation.

Therefore, the cause of the malfunction of the corner grinder may be a breakdown of the anchor. However, do not throw away such an angular grinder, it is possible to really carry out the repair with your own hands.

Ringing the failed coils is not such a difficult task and many can do it quite.

Where to begin?

Since the installer device is simple, the repair of the Makita peorator must be started with its disassembly. The disassembly of the peorater is best done by already verified order.

  • Remove the back cover on the handle.
  • Remove electrical coal brushes.
  • Disconnect the body of the mechanical unit and the stator case.
  • Disconnect the rotor from the mechanical unit.
  • From the stator body, extract the stator.

Remember, the body of the stator is green, the body of the mechanical block with the black rotor.

Disconnecting the rotor from the mechanical unit, we proceed to determine the nature of the malfunction. Rotor Makita HR2450 poses.54; Article 515668-4.

How to find a short circuit in the rotor

Since you are making independent repair of peorators, you need an electrical circuit of the Makita 2450, 2470 peorator.

Makita 2470, 2450 Poorators use collector electric motors.

Determining the integrity of the collector engine begins with a general visual inspection. The faulty rotor has poses.54 traces of burnt winding, scratches on the manifold are visible, traces of Gary on the Lamel of the collector. A short circuit can only be determined in the rotor, in the chain of which there is no break.

  • To determine a short circuit (short circuit), it is best to use a special IK-32 device.
  • Checking the anchor on the short circuit using a homemade indicator
  • Having made sure, using the indicated device or a home.made device, that the rotor between the turns of the turns of a short circuit, proceed to its disassembly.
  • Rotors before disassembly

Before disassembly, be sure to fix the winding direction. This is done very simple. Looking at the end of the rotor from the collector, you will see the winding direction.

There are two windings of winding: clockwise and counterclockwise. Fix and write down, you will definitely need this data with independent winding.

The rotor of the makita peorator direction is a clockwise winding, right.

Diagnostics by the anchors checking device (throttle)

The anchor testing device determines the presence of an inter.flip circuit of the winding. The throttle is a transformer that has only the primary winding and the magnetic gap in the core is cut out.

When we put the rotor in this gap, its winding begins to work as a secondary winding of a transformer. Turn on the device and anchor the metal plate, for example, a metal ruler or a hacksaw canvas.

If there is an interval circuit, the plate will vibrate or magnetize the anchor body from local oversaturation of the iron. Turn the anchor around the axis, moving the plate so that it lay on different turns.

If there is no short circuit, then the plate will move freely along the rotor.

Making a simple weaving machine with your own hands

The procedure for disassembling, repairing, assembly of the rotor of the penetrator

Here is a sequence of rotor repair with a short circuit of windings:

  • Pruning the frontal part of the windings.
  • Removing the collector and frontal parts and measuring the diameter of the removed wire.
  • Removing and cleaning the insulation of the grooves with calculating the number of turns along the cuts.
  • A selection of a new collector.
  • Installation of a new collector.
  • Production of blanks from insulating material.
  • Installation of sleeves in grooves.
  • The winding of the anchor.
  • Slopics of conclusions.
  • The process of thermal shrinkage.
  • Booking the shell.
  • Impregnation of the shell.
  • Collector impregnation
  • Milling of the grooves of the collector lamellas
  • Balancing
  • Rotor stripping and grinding.

Stage I

At the first stage, the collector must be removed from the anchor. The collector is removed after the boring or sawing the frontal parts of the winding.

If you make an independent repair of the peorator, then you can cut the front parts of the winding using a hacksaw on metal. Clutching the rotor in a vice through aluminum gaskets, saw the front parts of the winding in a circle, as shown in the photo.

Stage II

  • To release the collector, the latter must be clamped by the gas key for the lamellas and crank up with the circumcised head of the winding, turning the key in different directions.

Stage III

When you remove the collector and the sidewalls of the winding, proceed to the removal of wire residues from the grooves, signs of insulation. It is best to use a hammer and an aluminum or copper chisel for this. The insulation should be completely removed, and the surface of the grooves is cleaned with sandpaper.

But before removing traces of the winding from the groove, try to calculate the number of turns laid in several grooves. Using the micrometer, measure the diameter of the wire used. Be sure to control how percent the grooves of the rotor are filled with a wire. With small filling, you can use a larger wire with a new winding.

Frozen the wire diameter before removing the wires from the grooves

By the way, you can clean the insulation by wrapping with sandpaper a piece of wood of the desired profile.

Choose a new collector of the desired diameter and design. The installation of a new collector is best done on a wooden bar, installing the rotor shaft vertically on it.

Putting the collector on the rotor, with soft blows of the hammer through the copper infusion, press the collector in the old place.

The turn was approached to install the isolation cartridges. For the manufacture of insulation sleeves, use electrocartes, synthlex, isoflex, lacomatic. In short, what is easiest to purchase.

Necessary tools

The following main materials, tools and devices are required to rewind the rotor windings.

Rewinding can be carried out in two ways:

  • completely manually without the use of any equipment;
  • productivity increases greatly using the simplest devices.

The user must be able to handle an electric soldering iron.

The presence of a winding wire, the diameter of which should correspond to the wire out of order.

Electrical insulating cardboard or other similar material.

Elevator paper, textolite plates, soft species and other materials for auxiliary work.

Epoxy resin or other impregnation varnish.

Another fitting tool: hammers, sets of screwdrivers, hacksaw cloths, sharp objects, such as a well.sharpened knife, chisel and other tools.

How to check the anchor on a corner grinder?

Visual inspection rules

Standard diagnosis involves a visual analysis of the device. It is necessary to analyze the integrity of the wire and the supply of current to the motor collector. With normal feeding, the angular grinder should be examined from the inside. To disassemble the device will not be difficult. It is best to photograph the location of the main modules of the device when analyzing. After disassembling, conduct a visual test of the anchor on the following properties:

  • The stroke of the anchor must be free;
  • the absence of black spots and smells that may talk about melting the winding, the insulating varnish of which leaves traces;
  • the absence of crumpled turns and soldiers of solder, which leads to a short circuit;
  • There should not be burnout on the lamella contacts, otherwise the binding of the Lameli Petushka and the shirt of the winding should be checked;
  • lack of worn out or burnt records;
  • The space between the lamellas should not contain graphite residues from the brushes.

If there are no deficiencies during visual inspection, then it is necessary to check with devices. The anchor on the corner grinder can be checked both using a tester and using a regular light bulb.

wind, anchor, corner, grinding

Tester inspection

The multimeter is set to the Ommeter position. The resistance of 200 Ohms is set. The probes are connected to the lamellas located next to each other. If the value on the device is less than 1 ohm, then there is a short circuit. With a value of more than average, the presence of a break in the turns is possible. With a high resistance or absence of any value (in the case of the use of a digital device), one can also judge the break.

There are situations when the cliff is not detected. Then a breakdown is done. With maximum resistance, one of the probes is placed on the shaft, and the other moves along the plates. If the value is zero, then there is no damage. Then the rotor is checked in the same way by the multimeter. The probe in this case moves through the lamella. If it is impossible to check the test, the light is used.

Block control

In the absence of a device at hand, many are interested in the question of how to check the corner grinder for possible anchor breakdown. The supply supplier wire is torn, and a light bulb is placed at the gap of one wire. Then the shaft rotates. By changing the brightness of the light bulb, you can judge the closure between the turns. In the absence of combustion, the following conclusions are possible:

  • The location of the brushes does not correspond to the working position due to the operation of the retaining spring;
  • rupture of the supply contour;
  • Closing or rupture in the stator winding.

You can call the indicator of short.closed turns and an anchors checking device. An experienced person can do this.

Laying scheme, winding Interskol 230, Makita 9558HN or 9558BN and other models

The procedure for winding the rotor windings depends on the number of grooves in the core of the rotor and the collector lamellas. The parameters determining the location of the winding wire on the rotor include the direction and step of the winding. The rotation of the spindle shaft (right or left) is precisely related to the choice of which direction the wire is laid. When performing the repair of the rotor, it is necessary to fix the above data of the burned winding.

Important: determine visually the highest coil and start to unwind the end from it in order to determine the layout of the winding wire. The preservation of the old scheme is a determining factor in the successful repair of the anchor.

The number of turns and the diameter of the wire is fixed after removing the frontal part of the failed winding, which will carefully remove the complete bundle of the wire in the groove.

Most of the operated Bulgarians, regardless of the model (Interskol, Makita and others) are structurally made with lamellas in an amount of 24 pieces and core with 12 grooves. The winding step is selected equal to 6.

12 grooves and 24 lamellas

Rotor for Interskol Corner grinder-2300m, Hammer. Photo 220 volts

The rotor winding with such constructive parameters is as follows.

  • The direction of the winding is installed (usually clockwise, if you look from the collector side).
  • In the purified grooves, isolation of the electrocardon and other similar material is installed. The winding wire is soldered to the lamella in accordance with the old laying scheme.
  • The wire is laid in the groove opposite the lamella designed by the first number and, according to the winding step, is sent to the groove returning back. The number of such styles corresponds to the size of the turns of the winding.
  • The scheme with 12 grooves and 24 lamellas is built after soldering the middle of the winding to the lamella and the continuation of the winding of the winding wire in the same groove. The required number of turns is withstanded and soldering is carried out to the lamella so the first complete coil is obtained.
  • Further, the winding is carried out in grooves and with the soldering of the middle of the winding to the lamella and the end of the winding to the lamella
  • Performing the coil winding in the above way, the last of which ends on lamellas, all 12 grooves and 24 lamellas will be involved in the laying scheme.

How to check the anchor of the corner 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.

wind, anchor, corner, grinding

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.

Replacing the anchor independently at home

Practice shows that if it is decided to replace the anchor of corner grinding, then it is best to change it along with the supporting bearings and impeller of engine cooling.

  • New anchor corner grinder. Must match your model. Intranscents with other models. unacceptable.
  • Takes, wrenches.
  • Soft brush and rag to wipe the mechanism.

How to remove the anchor

Replacement of the anchor begins with a disassembly of the corner grinder. The following steps are performed:

How to anchor in place

To set the new anchor of the corner grinder in place, you should take a new part, and then assemble the tool in the reverse order. The follower is as follows:

  • A fixation disk is installed on the anchor shaft.
  • The bearing is installed by the method.
  • A small gear is planted and fixed with a locking ring.
  • The anchor is started into the gearbox body, the docking holes are combined.
  • Reducer mounting bolts are twisted.
  • The anchor with the gearbox is inserted into the corner of the corner grinder and is fixed.
  • Brushes besieged to their places, closed with lids.

After performing these actions, the angular grinder is ready to work. Replacing the anchor is made.

Ancient Sufi wisdom says: “The person who is able to get out with dignity from a difficult situation is smart. But wise is one who does not fall into such a situation.»Following the rules of operation of household appliances, avoiding overheating of the motor, you can avoid breakdowns and troubles in the operation of a corner grinder. and storage of the tool in cleanliness and dryness will prevent its mechanisms from pollution and oxidation of current.consuming elements. Timely maintenance of the tool is guaranteed to relieve unpleasant surprises during operation.

The anchor of the corner grinder is a rotating element of the electric motor, which is the “core” of the entire structure of the device. The knot consists of a shaft. a metal axis of rotation, a wire winding, a collector. a set of contact plates, which are the ends of the windings of the winding and cooling screw. The anchor mechanically interacts with the front and rear bearing, the gear node of the corner grinding and graphite brushes; electromagnetic way with the stator. the outer part of the electric motor. The voltage is supplied to the anchor winding through the sliding contact of the brushes with the collector plates. lamellas.

The current transfer is carried out in rotation mode, which creates the conditions for friction and heating. These conditions carry the prerequisites for potential malfunctions.

The reasons for the breakdown

The angle of the grinder is the rotor. the rotor is a detail that is subjected to the greatest loads: temperature, mechanical and electromagnetic. Violations of the operating rules prescribed by the manufacturer leads to a quick failure of this unit. Some factors of such violations are:

  • going beyond the permissible time of continuous work;
  • lack of protection against aggressive media. dust, sand, dirt, moisture;
  • exceeding the load parameters;
  • mechanical damage;
  • work at the time of voltage drops.

These reasons can lead to the occurrence of the following fault failures:

  • melting insulation (insulating varnish) of contacts or winding as a result of overheating;
  • mechanical damage: scratches, chips, cracks, from contact with foreign particles that fell into the compartment with mobile details;
  • a breakdown at the weak points of the winding caused by overload;
  • curvature or violation of the balance of anchor shaft;
  • short circuit or the occurrence of soot on the lamella.

To eliminate the cause of the breakdown, it is necessary to study the device of the anchor of the angular grinder and conduct the appropriate diagnosis.

Crossing engines of drones and bells

To get started, the device should be disassembled and the engine to look around. The winding should not be removed immediately: first of all, you need to find out the number of its turns. It is not difficult to do this: enough, separating the upper one of the coils, cut it off. After that, you need to burn it with a burner. Now you can calculate the amount of its turns.

If it is decided to rewind the rotor independently, then the collector does not need to be removed. It should be seen and measured by the magnitude of its resistance in relation to the body (this value should not be less than 0.2 MOM). The collector should be cleaned of what remains of the previous winding and cut the grooves in its contact part. This is necessary in order to then insert the ends of the coils into these places and close them up.

Anchor after cleaning must be hypilized. The sleeves are made of electrical type cardboard, 0.2 millimeters, after which they are inserted into anchor grooves. Only after performing these procedures can you begin to rewind the coils of the motor.

If it is decided to use a circular winding, then the coil should be laid in a sequence way until all the grooves are filled. The direction of laying should be selected in the direction opposite to the hand of the watch (if the anchor lies with the shaft to the winding). This type of styling is called “laying on the right”.

Shelter Anchors

In the collector area, the winding is fastened with a bandage. This must be done using a thick thread of fabric, laid in several dense turns and tightly tied. Kapron threads do not need to be used, since Kapron can easily rafting when working the device.

After that, you need to check the product for the absence of interluvial short circuits and cliffs in the winding. This is best done before the product goes into impregnation, because before impregnation it is much easier to change the winding on the anchor.

To fix the received winding, you need to make an impregnation. This can be done using a conventional epoxy designed for hardening with a hot method with the addition of plasticizer. If this procedure is performed in domestic conditions, then any varnishes can be used. When the impregnation is finished and dried, it is necessary to perform a groove. How much you do it depends on how much the anchor will spark. The beat of the beats should not be more than 5 hundredths of a millimeter, while the cutter must be correctly sharpened for working with copper. After performing all these procedures, you need to re.check the product for the closure. instructions: how to rewind the electric motor at home

If the inconsistent does not concern the starter, gear, but you found the case in the winding, then here you will have to purchase copper and enlist the help of a collector puller. To begin with, the chain calls are carried out by the tester, the multimeter will help to call you, and in order to check the operability of the device, use the transformer of the short act. So you can choose the necessary deeds and tools to subjugate the corner grinder.

Rewinding process. painstaking and will demand patience and skills

The process itself consists of subsequent actions:

  • Elimination of an old winding. It must be carefully removed and the iron building of the anchor itself will not hurt. If you find scratches or burrs, they must be made up with a skin or soldering. From time to time, so that the body is completely cleaned by the burner.
  • Preparation for connecting new wires. It is not necessary to remove the collector itself. It will be necessary to look around the lamella and measure the resistance of existing contacts in relation to the body by a multimeter. The indicator should be approximately 0.25 MOM.
  • Elimination of old wires. The remains must be painstakingly remove and cut through the grooves in contacts. In the upcoming they will come in handy to stick the coil wires.
  • Installation of sleeves. Sleeves are created from a cardboard of an electrical type, this is a material whose thickness is less than 3 mm. The right amount is cut and inserted into the rafting of the anchor.
  • Rewinding. The end of the wiring must be soldered by the end of the lamella and wind it in a circle counterclockwise. This action is repeated in relation to all tubs.
  • Property check. After all windings are made, using the multimeter, inspect the presence of short circuits or cliffs.
  • Final processing. The finished coil is processed with epoxy il varnish. At home, finished work is dried in the oven. You can use a varnish that dries a frozen.

Read how to cut ceramic tiles with a corner grinder

It may seem that the work is not easy. We hasten to assure that there is no, but there will be a lot of time and effort for it, a lot.

Standard diagnostics

While taking the device for diagnosis, inspect the anchor. Damage occurs here. If the wiring is melted, the burned insulation varnish will leave black traces as it is also called a specific smell. Bent and crumpled turns or conductive particles come across, for example, the remnants of the solder. These particles are a prerequisite for a short circuit

between the turns. Lamels have bent edges called roosters to connect with the winding.

Due to the 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 lamellas, which also shows a closure on the kutser.

Checking the indicator of short.closed turns (IKZ)

There are anchors from which you do not see the wires connected to the collector due to pouring by an opaque compound or due to the bandage. Therefore, it is difficult to find switching on the collector regarding the grooves. The indicator of short.closed turns will help here.

This common hearing device has small sizes and is easy to operate.

First check the anchor for the absence of cliffs. In another way, the indicator will not be able to find the Kutsey close

For this purpose, the tester determine the resistance between the 2 adjacent lamellas. If the resistance exceeds the average at least half, it means, of course. In the absence of a cliff, run up to the next step.