How to check the drill button with a multimeter. Replacing the sleeve

How to disassemble a drill button with a speed regulator

The reasons for the rotor breakdown may be improper operation of the power tool, which is represented by the following factors:

  • The permissible time of continuous operation has been exceeded, which is one of the main reasons for the failure of household Bulgarians;
  • Carrying out work in conditions of aggressive environments with the presence of sand, moisture, abrasive dust and other similar materials;
  • Work in conditions exceeding the permissible load;
  • Some mechanical malfunctions affect the imbalance of a rotating rotor, which ultimately affects the normal functioning of the rotor electrical circuit;
  • Network voltage instability during operation by the electric tool.

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

The operation of the power tool, associated with the action of these factors, leads to the occurrence of the following faults:

  • Cliff of coil conductors;
  • Short circuit between turns due to burnt insulation;
  • Isolation loses its properties, which can cause a break in the winding to the core body;
  • Violation of collector contacts;
  • Parts of charred insulating varnish or melted solder that have fallen into the gaps that come into contact with a rotating rotor, can cause mechanical damage to the elements of the grinder: cracks, carcasses, deep scratches.
  • The collector’s lamellas wear out unevenly, a short.Circuit is formed on them.

This is mainly happening with prolonged operation of the collector engine of the grinder without a break to rest. The insulation of the winding from heating loses its characteristics, is melted, which leads to a short circuit of the turns. The contacts connecting the anchor winding with the collector lamps can be soldered, the electric current is interrupted and the electric drive stops.

Possible tool malfunctions. We carry out repairs ourselves

If your tool has become worse, or completely stopped performing its direct duties, it is time to diagnose the malfunctions and try to cope with them. First, check the wire for damage and the voltage in the outlet, for which you can include any other device. TV or kettle.

If the voltage is smaller, you will have to change the batteries to new. If the battery works normally, power supply is normal, look for problems in the hardware. The most common breakdowns are considered:

How to connect a drill button yourself?

Despite the fact that this process is quite complicated, you can do all your work with your own hands, observing some important rules. For example, remember that the opening of the case can lead to the fact that all parts and poorly fixed spare parts will simply fall out of the case. Naturally, this should be avoided, because then it will be quite difficult to assemble the device together. To do this, you can smoothly raise the lid, noting the exact location of the spare parts on paper.

The button is repaired as follows:

  • First, locks for the casing are tidied, after which it is carefully pulled out;
  • All rusted and darkened terminals are cleaned of soot, for which you can use alcohol or sandpaper;
  • We re.Collect the tool, making sure that all the details of the device are in its place, and check the operability of the drill. If nothing changes, we change the detail;
  • We fill the circulation regulator with a compound, and therefore, when failing, the part is simply replaced by the part;
  • Frequent breakdown is the erasure of the working layer under the rheostat. It is better not to repair it, just spend time in vain, it is better to purchase a new one and replace it and replace it.

Many are interested in where to get a similar scheme? First of all, she should go along with the instrument when buying it, but if there is no scheme, or you lost it, you will have to look on the Internet. After all, only with its help you can carry out repairs correctly, without errors. By the way, the speed control button and the reverse control button are located in different places, and therefore they will have to be checked separately.

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How to connect a drill button yourself?

Despite the fact that this process is quite complicated, you can do all your work with your own hands, observing some important rules. For example, remember that the opening of the case can lead to the fact that all parts and poorly fixed spare parts will simply fall out of the case. Naturally, this should be avoided, because then it will be quite difficult to assemble the device together. To do this, you can smoothly raise the lid, noting the exact location of the spare parts on paper.

The button is repaired as follows:

  • First, locks for the casing are tidied, after which it is carefully pulled out;
  • All rusted and darkened terminals are cleaned of soot, for which you can use alcohol or sandpaper;
  • We re.Collect the tool, making sure that all the details of the device are in its place, and check the operability of the drill. If nothing changes, we change the detail;
  • We fill the circulation regulator with a compound, and therefore, when failing, the part is simply replaced by the part;
  • Frequent breakdown is the erasure of the working layer under the rheostat. It is better not to repair it, just spend time in vain, it is better to purchase a new one and replace it and replace it.

Many are interested in where to get a similar scheme? First of all, she should go along with the instrument when buying it, but if there is no scheme, or you lost it, you will have to look on the Internet. After all, only with its help you can carry out repairs correctly, without errors. By the way, the speed control button and the reverse control button are located in different places, and therefore they will have to be checked separately.

How to check the drill engine?

Checking the light switch multimeter

  • Disconnect the circuit breaker;
  • Open the device cover and, if necessary, remove it from the mounting box;
  • Switch the multimeter to the “Resistance measurement” position;
  • Measure the resistance of the circuit breaker in both positions. “inclusive” and “off”.

Device for checking the anchors and stators of electric machines

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

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.

The principle of operation and the main nodes

The drill owes its appearance to the demand for underground drilling to replace manual labor with automated. In 1870, the American inventor Simon Indersoll was represented by the ancestor of the shock drill. In his work, the tool used a steam drive and a drill. The appearance of electric motors at the end of the 19th century allowed to improve the tool. So, in 1889, engineer Arthur James Arnot proposed using the electric motor together with the drill, and already in 1895 an instrument appeared, freely retaining when working in his hands.

At the beginning of 1917, Arthur Arnot, working on Black Decker, connecting a button to the drill and adding a pistol handle, made the device one of the most popular power tools in the world. Since then, the design of the electrodegro has not undergone cardinal changes.

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The classic drill works only in drilling mode, but with the development of manufacturing technology, modern devices began to be equipped with a shock mode. When connecting to the 220 volt network, the gearbox, converting the electrical energy into a mechanical one, makes a cartridge connected to the mechanism of the device, make rotational movement. The number of revolutions of the cartridge is controlled using a rheostat mounted in the power button, and the direction of rotation is set by a reverse. The drill clamped in the cartridge, due to its shape and under the influence of high speed, easily performs the hole in solid or soft material.

#EP-71 Multimeter Repair Know Working Of Electronics In It

To make a blow in the device, reciprocating movements arise due to the work of the motor are used. A ratchet representing a gear ring is installed on the axis of the location of the cartridge, and the teeth are performed on the housing that create the emphasis. Когда ударная дрель переключается в режим «сверление с ударом», храповик зацепляется за упор, а затем с него соскальзывает. The shaft makes blows in the vertical direction.

Before starting the repair of the drill with your own hands, it is necessary to determine which part of it needs to be restored.

The main parts of the drilling tool are:

  • Capacitor;
  • Engine start and stop button;
  • Revolutionary control device;
  • Reverse switch;
  • Bearings;
  • Electric motor;
  • Engine cooling device;
  • Gearbox;
  • Return spring;
  • Chuck;
  • Corps elements.

Thus, the electroderley nodes are divided into electrical and mechanical modules. It should be borne in mind that the shock node has low performance and with frequent use of such a mode in the work quickly wear out.

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The wear of the shock unit not only negatively affects work on the chopping, but also increases the load on the electric motor, forcing it to overheat.

The device electric motor

The engine is the main element of the device that acts in the tool gearbox. It consists of a stator and a rotor, while the rotor is a mobile part, and the stator, respectively, is not. The rotor design includes anchor with the collector. An anchor is an element of an engine assembled from steel plates. On them, windings from the electric current of the material. Copper. Copper are wound. The collector is a cylinder. It is made from the dielectric and the current of the plates, the anchor windings are connected to these plates.

Due to the magnetic flow created around the anchor, the stator windings, its rotation occurs, which leads to the occurrence of the moment of twisting. The magnetic flow that occurs under the action of direct current is always directed only in one direction.

The food of the food for the windings occurs by means of brushes made of graphite. The brushes are located in such a way that they provide constant electrical contact with the anchor.

The wear of the brushes should not exceed 70–80 percent, if this value is higher, then the contact worsens, as a result of which sparking occurs in this place. Before replacing the brushes, you should pay attention to the brush holder and, if necessary, clean it. Thus, the main parts of the electric motor are:

Checking of windings is most easily carried out by a multimeter. To do this, with one contact wire of the measuring device, the brush holder is concerned, and the second is touched to the contacts of the inclusion in 220 volts. If the tester shows endless resistance, then this means blocking the winding. The working resistance of the stator winding is in the range of 30-60 Ohms. For example, in the popular electroderli intercol DU-13/580 ER resistance is 40 Ohms. When replacing the stator, you will have to disassemble the engine. For this, four screws are unscrewed and the case is dismantled to two halves. As a result, access to other parts of the engine is exempt.

The anchor connects to the gearbox. Often, visually examining it, we can conclude that its integrity. There are no scratches and blankets on the anchor. When replacing the anchor, it is important to correctly install a bearing with a rubber gasket. It is possible to measure an anchor with a simple tester only for a break in the winding, but for verification for an interval circuit, a specialized device will be needed. The measurement is made in the mode of checking the resistance between the anchor windings on the lamellas. The resistance between all lamellas should be the same.

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Revolution regulator

The power tools of the power tool are controlled by a simystory regulator located in the button to turn on the device on a special gasket made of textolite. When you press the button on the control of the simistor, variable voltage is applied. The symistor opens and the current enters the load. When the polarity at the inlet changes, the semiconductor device closes. Then everything is repeated in the cycle.

check, drill, button, multimeter, replacing

As a result, the signal at the output of the Simistor will have the form of impulses. The larger the signal level is supplied to the semiconductor, the more time it is open, which means that the pulse length at its output is greater. The degree of opening of the simistor is regulated by alternating resistance that limits the signal that supplies to the semiconductor.

Bosch drill batteries check and repair

In addition, the speed of rotation of the cartridge into the electrodele depends on the force of pressing the launch button. This is realized by connecting a button with a speed regulator. Drinks, depending on their type, may have a different circuit of the circuit breaker, but its device is the same. In the case of the buttons, the contact group and spring.Loaded plates (resistors) are placed in the case. These plates are made in the form of sliding contacts.

Servicing & Troubleshooting a Power Drill

Scheme for connecting a drill button with a revolution regulator and a reverse

Actually visual connection diagram is shown in the below image.

  • The figure has the most common type of spare part. The mounting of electrical wires from the network fork is carried out to the terminals that have a bolt mount. The rest are stuck into self.Loading contacts. If your button is not like that, then it is better to make notes on the old copy, which is mounted where. Also, a scheme can be drawn on the case itself, according to which you can also navigate.
  • If you connected the capacitor as it was written above, then after connecting the wires from the fork, only two contacts will remain on your lower part, where you need to stick two cables from the stator. Usually they have the same position on the stature as in the figure. Their length should be greater than the other two, so that they can reach their clamps. There is no difference which wire in which of the two contacts to stick.
  • The remaining two electric wires from the stator, as well as the cables from the brushes are connected to the clamps of the reverse. In this case, the connection is carried out diagonally: the wires from the stator stick on different sides into diagonally located contacts; and from brushes also. At the same time, the wires will be stuck on where the wires will be stuck in which direction the cartridge will rotate at a certain position of the reverse trigger. The main thing is to connect diagonally.

This is the connection scheme. I hope that you will be able to connect everything correctly and the drill will work as it should.

check, drill, button, multimeter, replacing