How to check the stator of the corner grinder multimeter. Visual inspection

Checking the stator of the corner grinder for the interval closing video

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 corner grinder.

Rules that will help to avoid overheating of the engine angular grinder:

  • 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 a spoiled coil of the stator of the corner grinding stator can be done with your own hands, but it is recommended to entrust this work to a specialist.

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.

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 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.

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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.

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.

Checking the stator and rotor of power tools for interval circuits

To check the stator and rotor for the 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.

Checking the engine windings

Rotor electronic tester is a standard digital multimeter. Before proceeding to testing the closure, you should check the multimeter and its readiness to work. The switch is set to measure the resistance and touch each other’s probes. The device must show zeros. Set the maximum measurement value and conduct a check:

  • First you should check the rotor for a chain break. Touching a black probe to the contact ring, red should be rolled red. The arrow of the device went off scale, which means that the winding has a break in the circuit of the boots. The rotor should be given to rewind;
  • We measure the resistance to determine the possibility of short circuit on the case. We fasten the black probe on the contact ring, the red roller should be reinforced with red. In the case of a low indication of the resistance and sound signal, such an anchor must be given for repairs;
  • Carrying for a dialing for interval circuits of rotor turns. Reinforce the probes on the contact rings of the anchor. With a value on the scale of the device, from 1.5 Ohms to 6 ohms, we checked a working device. All other values ​​on the scale mean a multimeter malfunction.

On this, the rotor check is completed. Once again, the main stages of determining the malfunction should be reminded. Before checking, an angular grinder or any other device should be de.Energized.

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Before measurements, you should visually inspect the housings, isolation and lack of soils at the stature and rotor.

It is necessary to clean the surfaces of contacts from blockages with dust and dirt. Pollution leads to an increase in current when engine power loss.

When disassembling the tool for the first time, write down all your steps. This will allow you to have a hint next time, avoid the appearance of unnecessary details during assembly. When the brush exit by the edge of the brush holder is less than 5 mm, such brushes should be replaced.

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You can check the inter.Seal circuit by an electronic tester, that is, a multimeter.

How to check the serviceability of the stator

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). Among the possible causes of the malfunction of the corner grinding machine. Ugly grinding, “corner grinding”. Includes a break or short circuit of the turns of the winding (coil) of the stator.

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.

Carefully check the stator of the angular grinding machine is relatively simple. But you can do this only using special devices. Therefore, if a visual inspection confirmed that the cause of the malfunction of the corner grinder is a spoiled stature, it is better to further check and repair in a specialized workshop.

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Description-electrical compounds

Consider the sequential connection of the nodes in the electrical circuit of this technique. The topic is very simple and short. From fork \ rice.1 \ The first wire is contacted through the switching and off key, then connected to the first stator winding. From the stator winding, the same wire goes to connect with a graphite brush. \ Two graphite brushes are in contact with the collector of the electric motor rotor \.

The second wire coming from the fork,- contacts the second winding of the electric motor stator, from the second winding of the stator wire / phase or zero \ enters the second graphite brush. As a result, both brushes are closed on the winding of the electric motor rotor.

The sequence of compounds of the joints is checked both for all household appliances- with a multimeter \ device \ on resistance or probe. A frequent cause of the infantry malfunction is the contact of the wire of the wire connected to the graphite brush, this happens from the vibration surveyor issued by the peorator.

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

All power tools over time begin to fail. Malfunctions are divided into mechanical and electronic. Frequent electronic malfunctions. These are malfunctions associated with the failure of the brushes. In second place: failure of the bearings of the anchor. Often the stator or rotor failures occur. How to correctly find a malfunction of the stator, the rotor of the Makita pedorator two thousand four hundred 50 and 2070, change the brushes? And here the principle scheme of the Makita 2450, 2470 peorator will help us.

How to repair or replace the brushes of the Makita peorator two thousand four hundred and fifty and 2470

The fact that you need to change the brushes of the penetrator, say overstated sparking in the area of ​​the rotor collector, the smell of burning, heating the brush holders. The new or repaired peorator has a spark under the brushes moderately, there is no unchanged length and spark detachment in a circle. Bearing wear, damage to the insulation of the rotor or stator exactly shows at the spark along the entire circumference of the collector. The occurrence of such a spark indicates the burnout of the collector records, failure of the rotor or stator.

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The resistance of the winding of the stator of the corner grinder

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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Features of performing the anchor of the angular grinder by the tester

The diagnostic procedure will help to accurately determine the malfunction of the electric motor part. The testing of the anchor of the corner grinder of the tester will allow the device that is available in the arsenal of the tools of many amateur electricians. With the help of a tester, you can check not only the anchors of the Bulgarians, but also the stator windings of other electric motors. In the video below, you can see one of these home.Made measuring devices in action.

When the tester is included in the network, the indicator lights up. Red light without applying a technical device to the anchor means the readiness of the device for checking. The working active surface of the measuring device has two points of contact with the studied. One of them is the generator coil, the second is the coil of the curls of communication. When checking the anchor of the corner grinder, the tester must be substituted by the tester to the study. Make sure that the sensors do not go beyond the anchor plate simultaneously on both sides.

If the electric deeum is proper or rewound, then during its verification by the tester opposite each of the grooves, the indicator will burn with green light. If there is a malfunction in the anchor of an angular grinding machine, in particular, an interval circuit, in the place of its localization, red light will be noted on the instrument indicator. Be careful when performing a diagnostic procedure to achieve the correct contact of the surfaces when checking the anchor of the corner grinder by the tester. Do not exclude from the reasons for the failure of the corner grinding machine, mechanical damage, which can be visually seen without calling by a multimeter. They can be both significant and small. You may notice a breakdown when examined by dismantling the corner grinder. Diagnose such malfunctions is necessary before checking the anchor for interespilment close.

If you do not have the experience of disassembling the power tool or preparing for working with measuring devices for calling the anchor with a multimeter and are not confident in your own abilities, you should not interfere in the design of the corner grinder. Do not experiment so as not to damage the angular grinding machine. In this case, in order to detect the cause of the breakdown of the power tool and perform the testing of the anchor of the corner grinder, it is better to contact the service center or to qualified locksmiths that specialize in the repair of equipment.

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