How to check the REBIR saw stator. How to correctly determine the malfunction of the stator of the rotor of the punch makita and choose the brushes

How to check the REBIR saw stator

We check the possibility of short circuit on the case. This malfunction will lead to a decrease in the power of the mill, the possibility of electric shock and an increase in temperature during operation. Work is carried out according to the same scheme. We turned on the measurement of resistance on the scale.

Place the red probe on the output output and attach the black probe to the stator body. If on the tester scale the winding is short to the case, the resistance value will be less than for the healthy. This malfunction requires rewinding the stator windings.

It is time to take measurements and check if the stator winding is cut off. For this, the resistance value on each winding is measured.

The zero point of windings is determined by measuring the resistance for each of them. If the device has the lowest resistance of the winding, it should be replaced.

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.

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Rotor malfunctions

With optimal use, the rotor does not wear out. Daily maintenance is performed with the replacement of brushes as they wear. But over time, at high loads, the stator heats up and releases carbon dioxide. The most common mechanical malfunction. It is wear or uneven bearings.

The mill will work, but at the same time, the plates wear out quickly and over time the engine fails. In order to avoid damage, it is necessary to check the tool and maintain normal operating conditions.

Moisture in contact with metal causes rust. The friction force increases, the current is needed more to work. Significant heating of the contact groups is observed, it is soldered, a strong spark appears.

Checking the engine windings

Electronic rotary tester. This is a standard digital multimeter. Before checking the circuit, check the multimeter and its readiness to use. The switch is installed to measure the resistance and contact of the sensors with each other. The device should show zeros. Set the maximum measurement value and check:

  • First check the rotor for the presence of a chain. Touching a black sensor to a sliding ring, the windings should be rang red. The arrow on the device is not on the scale, which means that the winding is open. The rotor must be rewound;
  • Measure the resistance to determine the possibility of short circuit on the case. Fix the black probe on the contact ring, the red rotor must catch on to close the rotor housing. In the case of a low resistance and sound signal, such an anchor should be provided for repair;
  • Call the rotor reverse circuit. We strengthen the probes on the anchor contact rings. Based on the scale of the device, from 1.5 to 6 Ohms, we tested the working device. All other values ​​on the scale indicate a multimeter malfunction.

This completes the rotor check. Again, the main steps to eliminate problems should be caused. A grinder or any other device must be disconnected before checking.

Before the measurements, the case, isolation and lack of deposits at the stature and rotor should be inspected.

Contact surfaces must be cleaned of dust and dirt. Pollution causes an increase in current when engine power loss.

At the first removal of the tool, write down all your steps. This will allow you to tell you the next time to avoid unnecessary details during the assembly. When the brush leaves the edge of the brush holder less than 5 mm, these brushes should be replaced.

You can check the rotation circuit using an electronic tester, that is, a multimeter.

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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 corner 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.

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.

Non.Standard check

The most accurate way is to check the stator using a metal ball and a lowering current transformer. The stator is connected to the conclusions of three phases from the transformer. Having checked the correctness of the connection, we turn on our circuit with a reduced voltage to the network.

We throw the ball into the stator and observe its behavior. If he “stuck” to one of the windings. This means that an interval circuit has occurred on it. The ball is spinning in a circle. The stator is working. Quite an unscientific, but effective method of detecting interval circuits at the status.

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 angular grinder (angular grinder), 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 corner grinder is a device for verifying 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.

The device operates in two modes. “Anchor” and “Stator”. Change of mode occurs using a switch. The device is equipped with a convenient device for installing and fixing the engine checked. It consists of two paws attached to the shaft. The legs move freely along the shaft, which allows you to change the distance between them and check engines of different sizes. Verification is carried out using two probes. For a cliff or short circuit, special red LEDs and sound signal indicate on the stator winding. Read more the check procedure is described in the instructions for the device.

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.

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If most of the wiring is damaged in the anchor and the balancing is disturbed as a result of overheating, it is better to replace it entirely. Increasing the balancing is indicated by increased vibration and uneven hum during the operation of the mechanism.

How to rewind the anchor. Step.By.Step instructions

If the balancing of the anchor is not broken, and the problem is only in spoiled windings, then such an anchor can be restored independently by rewinding the coils. Ringing the rotor at home requires great patience and accuracy.

For independent rewinding of the anchor, you will need:

  • New winding wire. Copper core with diameter, exactly corresponding to the old conductor is used;
  • Dielectric paper for isolation of the winding from the core;
  • Varnish for pouring coils;
  • Soldering iron with tin-blue solder and rosin.
check, rebir, stator, determine, malfunction, rotor

Before rewinding, it is important to count the number of turns of the wire in the winding and wind the same amount of new conductor on the coils. The rewinding process consists of the following steps:

The rewinding process consists of the following steps:

check, rebir, stator, determine, malfunction, rotor
  • Dismantling of old windings. They must be carefully removed without damaging the metal hull of the anchor. If any burrs or damage were found on the case, they must be made up with a file or sanded. Sometimes, for complete cleaning the body from toxins, the masters prefer to burn it with a burner.
  • Preparation of a collector for connecting a new wire. To remove the collector there is no need. Lameli should be examined and measured with a megammeter or multimeter of the resistance of contacts in relation to the body. It should be no more than 0.25 MOM.
  • Removing the old wiring on the collector. Thoroughly remove the remains of the wires, cut the grooves in terms of contacts. In the future, the ends of the coil wires will be inserted into the grooves.
  • Installation of sleeve for anchor. Sleeves are made of dielectric material 0.3 mm thick, for example, electrical cardboard. Cut a certain amount of sleeves and insert into the grooves of the purified anchor.
  • Rewinding coils. The end of the new conductor is soldered to the end of the lamella and wound with successive circular movements, counterclockwise. Such styling is called “laying to the right”. Repeat the winding for all coils. Near the collector, pull the wires with a thick thread from the x/b fabric (it is forbidden to use kapron, as it melts when heated).
  • Checking the quality of the winding. At the end of laying all the windings, check the absence of inter.Flip circuits and possible breaks with a multimeter.
  • Finish processing. The finished coil is treated with varnish or epoxy resin for fastening the winding. In factory conditions, impregnation is dried in special furnaces. At home, this can be done in the oven. As an option. To use rapidly dry varnishes for impregnation, applying a coating in several layers.

How to check the starter anchor for MZHZ and other malfunctions

How to check the starter’s anchor multimeter

An integral part of any car is the starting device. If it functions well, then the engine starting will not cause problems, even in winter. And on the contrary, if there are flaws in the starter, the engine will be more difficult to start every time. From this article you will learn how to check the starter’s anchor at home for an interval circuit and other malfunctions.

What threatens the fault failure

Problems with anchor, along with various breakdowns, wear and tear, are attributed to the most common. A malfunction of this property can provoke a full failure of the starter, which, of course, will give prerequisites for problems in the ignition system.

You should know that the breakdowns of this type are not “treated” immediately. It will take a little time and effort to first establish the cause, and then eliminate it.

check, rebir, stator, determine, malfunction, rotor

In addition, malfunctions can be completely entrusted to specialists in a hundred. They know their business well, but for any operation, no matter how simple it is, they will have to pay from their Therefore, some things can and should be learned to do it yourself.

How to determine the location

If the anchor’s windings are cornered, then this threatens big problems. To be able to deal with the breakdown and eliminate it, you will need to carefully inspect the outputs.

Visual inspection can give comprehensive answers. Almost every experienced motorist, and what is there. A specialist, should be able to make an assessment already at the visual stage of inspection. Just as there is no smoke without fire, there is no short circuit without traces of Gary.

After determining the location, the contacts should be cleaned, and then check the resistance with a measuring device configured on OM (multimeter, for example).

Isolation of the problem area. The next stage of work. A mixture of asbestos with super glue will help well, which will give the composition the property instantly freeze.

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If the place of breakdown, nevertheless, could not be determined, you need to use it so far also in a simple way. A cleaned copper wire is taken, which needs to be tied all the lamellas so that they connect and have an effect on each other. Then a pulse is filed for a short time in order to determine a weak place. Current can be successfully supplied using a welding machine, acting on the mass and collector. Where the welding arc will pierce, and there is a place of short circuit.

In extreme cases, if again it was not possible to identify the location, the anchor winding can be rewound completely.

Interpretation circuit or MHZ is a malfunction of the number one anchor. It is determined using a special apparatus, which is intended specifically for these purposes. It is called PPI. It is a transformer that effectively determines the malfunction.

MZHZ is almost half of all malfunctions associated with electric motors (which, in fact, is the starter). The reasons for the occurrence of the MZHZ must be sought in overloading the device, erroneous operation and initial standard marriage.

It is noteworthy that improper operation of the starting device threatens the penetration of water inside the windings.

How to find MZHZ? It is not so difficult to determine it if you use improvised means and the above apparatus.

Here are several other ways to determine the MZHZ anchor:

check, rebir, stator, determine, malfunction, rotor
  • When the starter is operating, the device heats up unequally, some part, if touched, is very hot;
  • Measurement of the load on each phase by current ticks (it is obvious that if on one of the phases there is more than the others, this is a problem);
  • The dialing of the winding by the tester, which implies the obligation of a separate call (each winding separately, which makes it possible to verify the gathered resistance values);
  • Check with a megammeter, which will determine the closure on the housing (one terminal of the device is applied to the starter case, the other to the output of the windings).

The best and most accurate test of the anchor on the MZHZ is the use of Grauver Tester (American name) or in our opinion-PPI. True, the anchor should already be removed, and the starter is disassembled.

Ppi is a transformer that has only a primary winding, and a gap is cut out in the core where an anchor is placed.

  • The anchor is put in this gap;
  • PPI is included in the 220V network;
  • Any segment of a metal strip is anchored;
  • If a piece of metal begins to vibrate or magnetize, then the anchor has MHZ.

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Do not forget to rotate the anchor throughout the circumference, since the MZHZ may not be in the same plane, but be present in another.

Tips for professionals

Some tips of professionals will help prevent a breakdown of the anchor of corner grinding and extend the service life of the power tool. Prevention of dust and dirt from the hull:

  • Use a construction vacuum cleaner to remove dust when sawing non.Metallic materials;
  • Sprinkle the place with water, reducing the dust;
  • Close air intake grilles with gauze or a piece of nylon tights, periodically change/ clean this isolation;
  • Configure the gearbox so that the direction of rotation of the circle is turned “from yourself”. Dust and other sawing products will be directed away from the air intake grilles;
  • Do not put an angular grinder on the ground, in sand, dirt and on wet surfaces.

Tips for working with corner grinding:

  • Immerse the cutting disk into the material slowly, without pressure;
  • Help the sawing with the movement of the corner grinder back and back;
  • Compare the volume of sawing and the properties of the material with the technical characteristics and the power of the corner grinder;
  • If there is the possibility of speed adjustment, do not cut at low speeds for too long.

About how to check the anchor of the corner grinder, watch in the next video.

To check the stator and rotor for an inter.Seal closure by a multimeter, it will not take much time. You have to disassemble the engine longer. Corner grinder, drill, peorator. Each tool can be repaired by determining the malfunction. The check is better to break into several main stages, and consistently slowly perform actions.

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