Electric screwdriver smacked and slowly twists. Collector pollution

Do.it.yourself electrical screwdriver repair: 2 types of faults

In working condition, brushes move, interact with each contact of the collector. When working, the connection between them is created and torn alternately. At the time of the gap, you can observe how the electric screwdriver sparkles. Slight sparking is considered a normal phenomenon.

Pay attention in a situation where strong sparks fly out in the form of a sheaf. There may be several reasons here:

  • Nar was formed on the collector’s contacts;
  • graphite dust that came from the brushes turned out to be between the contacts;
  • anchor in anchor on windings.

Now you need to find the source of the phenomenon and correct.

Nar. the result of overheating of the motor. This circumstance leads to increased friction and overheating.

Craftsman 4v Cordless Powered Screwdriver CMHT66718B20Z

The vulnerability of the collector engine is that the brushes during friction about the copper plates of the collector wear out, dust is released, which falls into an important technical unit through the ventilation holes.

When closed, an electric screwdriver sparkles inside and smokes, the smell may appear. Knowing the sources of the formation of sparks, you need to proceed to eliminate their.

Selection of the electric screwdriver mode

Most of the models of screwdrivers have 2 modes of operation:

The main difference between them is that when drilling, the speed of rotation of the cartridge with a drill is much higher than when screwing. This is due to the use of a two.speed gearbox in the tool. In addition, in the drilling mode, there is no torque limiter, referred to as a “rattle”.

In particular, by starting work by bats in drilling mode, high turns will lead to an unexpectedly rapidly tightening screw and further attaching excessive effort. The negative consequences of this can be as follows:

  • Too deep screwing the methyse.
  • Thrust breakdown when working with soft material (fasteners will not hold on).
  • In solid material, a bat can “lick” the slots on a self.tapping hat or on a bit.

Ways to eliminate a malfunction

Ideal cleaning is carried out on a lathe so as not to violate the integrity of the drill circumference. At home, sandpaper can be used to remove soot.

  • First, a collector with anchor is removed from the unit.
  • Then it is necessary to carefully disassemble the body with tools to clean all inaccessible places from soot and dirt.
  • The strip is done carefully. It is possible to fix a malfunction by removing dust. For this purpose, a pointed tool is used, which sequentially clean the device.
  • If inter.flip circuit is detected, rewinding or a complete replacement of the anchor is made.

Preventive measures

In order not to accumulate graphite dust, you need to monitor the position of the brushes. Backlash should not be allowed, they should stand tight in grooves.

It is necessary to monitor the formation of an interval circuit in the anchor of the apparatus, in which the energy is heterogeneous to contacts, to some more in greater meaning, and to others in less. As a result of such a violation, sparks are formed.

The prevention of such a closure is carried out on a special device creating a magnetic field. Placing an anchor in the alternating field, the effect of rattling is obtained, due to the appearance of induced currents.

If the reason for the formation of sparking in a hand drill was an inter.seal circuit, then you need to apply a rewind or establish a new anchor.

For such reasons, there is a strong sparkling of any electrical screwdriver. Interskol, Bosh, Metabo or Makita. If the measures taken did not help to repair the device, it may be required to replace it.

Problems in the electric part

Signs of the device’s electrical malfunction are:

  • When you press the start button, the device does not turn on or the rotation of the cartridge is slow.
  • The tool works, but sparking is observed and clicks are heard.
  • There is a strong heating of the body even with short work.
  • There is no adjustment-speed, direction of rotation, mode of operation.

Consider what malfunctions can cause the signs described above. The tool does not turn on and the cartridge rotates slowly for the following reasons:

  • The battery is discharged or not charged.
  • Cliff in the electric circuit between the battery and the collector engine.
  • Electricifier malfunction.

If the battery is discharged, it must be charged or replaced with charged from the kit. 2 batteries are included in many models of screwdrivers in the kit.

The reasons why the electric screwdriver does not be charged:

DOBA breakdown is revealed by measurement voltage at the exit from the device and comparison with passport data. Voltage is usually 10.8, 12, 14.4 or 18 volts. 18V batteries are most common. over, the value of the measured voltage in the case of a good car must be slightly higher than the passport. If the voltage is less or absent, then the charger must be repaired or changed. You can repair this device yourself, but you need to understand electronics.

If everything is in order with the memory, the battery is to blame. He will either not issue voltage, or issue less than the value. For example, the Fieldmann FDUZ 50001 battery has a nominal voltage of 18 V, and gives out 10-11 volts. In this case, a slow rotation of the cartridge will be observed. It should be noted that slow rotation is caused by a mechanical malfunction. But in this case, the work of an electric screwdriver will be accompanied by a characteristic noise.

Guess that this particular knot was also out of order by its heating. Why is the battery of electrical screwdriver to explain easily. either poor electrical contact between it and the engine, or poor electrical contact inside this node, between battery banks.

How to reanimate the battery of an electric screwdriver? In the first case, you must try to degrease and clean the contacts. In the second. to disassemble the battery if the design allows you to re.fall the contacts. This option is only possible for a person who has the experience of such work. A faulty battery can explain why an electric screwdriver is quickly discharged. He either does not gain passport container during charging, or most of it goes into heat due to poor contacts.

In the first case, the battery is subject to unconditional replacement. In the second, you can try to clean or reinforce contacts. True, statistics show that often, even in the case of successful restoration of the battery, it lacks it for a long time and, in the end, it is replaced. A chain break between the battery and the engine is an air gap between the contacts of these devices. This usually happens in case of malfunction of the start button. The malfunction is eliminated by its disassembly, the revision of the parts-by cleaning and washing in the solvent-alcohol or white spirit and cleaning with grinding paper. If the launch button also regulates the number of revolutions, as in the model of Dewalt DCD710D2, then knowledge of electronics is necessary for its repair.

One of the reasons why the electric screwdriver does not twist is the malfunction of the electric motor. It is subject to disassembly and inspection. First assess the condition of the brushes. A very common cause of the malfunction is the wear of the elements in contact with the collector or the weakening of the spring that presses them. If so, then the brushes are replaced. If everything is in order visually examined by the collector and stator to detect a cliff of the winding, as well as the multimeter, the resistance of its winding is measured. If there is a cliff, interitic closing or closing to the case, the winding must be rewound. This is done on special equipment and definitely not at home.

How to choose a battery electric screwdriver: 6 tips and a rating of 5 cool models

Electric screwdriver is, in fact, a screwdriver electric substitute. He performs the same functions as the younger “fellow”, only makes the process of twisting/unscrewing the screws and bolts much faster. Such a tool is especially effective if the screws are dozens, or even hundreds. The device can not only twist the screws. By installing a special drill, with an electric screwdriver you can make holes in a tree, plastic and thin metal. powerful devices take even brick and concrete. In general, the tool is indispensable in everyday life and during repair.

Torque

The numbers in the characteristic show with what effort the electric screwdriver twists the screw or how much strength is required to overcome the load when drilling. What is the practical benefit of the knowledge of the parameter? The diameter and length of the screwed bolt depends on the torque. The larger the indicator, the longer and thicker the screws will be able to use in work without fear of failures or breakdowns. For example, at 40 n/m, it will turn out to freely “drive” a 10 cm long self.tapping screw into a tree.

In home small models, torque is from 10 to 30 N/m, but the indicator can be adjusted by tuning under the nozzle. For configuration on the housing of an electric screwdriver, a limiter is provided. a ring that goes immediately after a clamping cartridge. The user can coordinate the force for specific self.tapping screw, scrolling the limiter. Result: As soon as the self.cut spin to the desired level, the cartridge will stop, although the motor will work.

Interesting: the limiter not only helps to tighten the bolts, preventing excessive “pushing” into the material, but also protects the tool from wear.

Cartridges for the tool

Buyers often ask: “How to choose the right electric screwdriver for the home, focusing on the type of cartridge?””. The answer is to remember the information and learn how to distinguish one type of cartridge from another. There are 3 of them:

  • Key. the drill in it holds a device resembling “fists”. the two sides of the cartridge are connected by the fasteners to the center and in this way the gun is clamped. The cartridge nut is twisted with a special key that comes with the kit. To replace the equipment, it is necessary to spend some time, but the fixation is strong and reliable, which is ideal for working with solid material.
  • Fast-packed- one- and two-lump. The main difference is that the nozzle changes with one hand in one.way cartridges. press the cartridge, remove the equipment, put another. For two.shirt, both hands will have to be involved, which is already inconvenient.
  • Hexagon. Special “nest” for bit, which are necessarily included with a tool with such a cartridge.

Looking through the assortment of batteries with different cartridges, it is difficult to answer which is better. Rather, you need to look at the diameter of the hole in the cartridge, it depends on it which equipment can be used when working. In household tools, nozzles are used with a thickness of not more than 1 cm.

Read how to put an electric screwdriver for charging

Preventive measures

In order not to accumulate graphite dust, you need to monitor the position of the brushes. Backlash should not be allowed, they should stand tight in grooves.

It is necessary to monitor the formation of an interval circuit in the anchor of the apparatus, in which the energy is heterogeneous to contacts, to some more in greater meaning, and to others in less. As a result of such a violation, sparks are formed.

The prevention of such a closure is carried out on a special device creating a magnetic field. Placing an anchor in the alternating field, the effect of rattling is obtained, due to the appearance of induced currents.

If the reason for the formation of sparking in a hand drill was an inter.seal circuit, then you need to apply a rewind or establish a new anchor.

For such reasons, there is a strong sparkling of any electrical screwdriver. Interskol, Bosh, Metabo or Makita. If the measures taken did not help to repair the device, it may be required to replace it.

Diagnosis and elimination of malfunctions of the electrical part of the electric screwdriver

If you have a battery device, then the first thing you need to check the batteries in the battery block by dismantling it. There are collapsible and non.vegetable blocks. In the second case, you will need to carefully insert the screwdriver into the place of gluing the walls of the block and, slowly, disconnect them.

Next, it is necessary to measure the voltage on all “banks”. The voltage rating is indicated on the body of each battery. The voltage should be slightly lower than the indicated, but the same on the working batteries. Faulty batteries will differ significantly from the rest in the voltage issued. they will need to be replaced. New batteries can be purchased on the Internet.

It is important to solder them correctly, that is, in series: plus one battery connects with a minus another, and plus the second with the minus of the next, etc.D.

If you are the owner of a network electrical screwdriver, then the test algorithm is slightly different. At first, you need to promote the body of the device and remove it one half. Take the tester and “call” the power cord for a cliff. In the case of a good cord, you need to check the start button. Check with a button pressed if there is a circuit on the output of its contacts. If the button is faulty, it will need to be replaced or repair. How to do this will be considered later. With a good button, the problem can lie in electrographs or engine.

Repair button

Below is the electrical circuit of the battery electrical screwdriver.

VESSEL Cordless Rechargeable Ballgrip Screwdriver

It shows from the diagram that 2 wires from the battery are suitable for the button, and 2 wires to the engine come out of it. Also, 3 wires from the transistor responsible for adjusting the revolutions are connected to the button. To understand the device of the button of the electrical screwdriver, it must be disassembled. All wires going to this details can not be soldered. They will not interfere with disassembly.

Remove the pressing mechanism (red) from your seat. Do this with neat rotational movements, while pulling the part in the opposite button, making sure that the joke does not break.

Next, remove the button cover. In the places indicated in the figure with arrows, with the help of a knife and screwdrivers, you need to put and push the latches, then remove the lid.

Removing the lid, you will see the reversal compartment. But the button mechanism will still be unavailable. Using the soldering iron, disconnect 2 elements (the next figure is indicated by the arrow).

Gently pull out the element under number 1, then remove the cover that closes the compartment with the mechanism for turning on the device.

Holding the return spring, take out the mechanism from the body.

In a faulty button, you will see the erased contact sites.

Contact sites wear out quickly due to the poor quality of metal. Small metal dust from the cooked contacts accumulates between them and closes the platforms. As a result of this, a spontaneous launch of the apparatus occurs.

With the help of a cotton swab moistened in alcohol, remove metal dust. If this fails, you can scrap her with a knife. After these actions, the spontaneous launch of the device will stop.

If a revolution regulator does not work, then the transistor is burned out, which must be replaced.

Replacing brushes

To check the condition of the brushes, it is necessary to disassemble the engine by bent the “antennae” located at the end of the case.

Next, with light beats of the hammer on the engine shaft, knock out the rotor from the body.

In this case, the cover in which the electric shows will be removed first.

The following photo shows that the collector has black. This means that it will pollute the dust from the brushes. As a result of the pollution of the collector, as well as the grooves between its plates, the engine power drops and the brushes sparkle. It is necessary to wipe the collector with cotton wool moistened in alcohol, and clean the grooves with a needle.

The following photo shows what a clean collector looks like.

If the brushes are worn out, they will need to be changed. For some models of screwdrivers, it is difficult to find original brushes on sale. But you can find brushes suitable in size, after which on a sharpener, tie them and connect (solder) to the brush holders.

Sometimes, to replace the brushes, you need to drink a groove into them. It depends on the method of their attachment.

electric, screwdriver, slowly, twists

To better understand how the brushes are replaced, you can use the following video.

The speed of the engine of an electric screwdriver is not adjustable

The lack of adjustment of the engine revolutions of an electric screwdriver significantly reduces convenience when working with the tool, and also makes it impossible to carry out quality work. The regulator is located in the immediate vicinity of the start button or executed with it as a whole, however, the transistor of the revolution regulator is attached to the electric motor where it is cooled through the grilles of the radiator.

Location of the controller control regulator (7)

As practice shows, in the event of a similar problem, it will be more correct to replace the revolution regulator completely with a new. Fortunately, they are on sale and are relatively inexpensive. All attempts to repair it cited the same conclusion unless, of course, you are a specialist in the field of electrical engineering.

Why does an electric screwdriver not twist under load. causes and repair

If an electric screwdriver does not twist, this is not a reason to dispose of it and buy a new device in the store. Most of the breakdowns are easily eliminated without the help of a specialist, but for this it is necessary to have basic knowledge about the work of the mechanism. First you need to start diagnostics and, after identifying the causes of the breakdown, fix the tool or take it to the service center.

Depending on how the breakdown manifests itself, its causes can be determined. There are 7 most common types of malfunctions, due to which the electric mechanism fails:

  • Battery wear. the tool works weakly, requires more frequent recharging. Solution. buying a new battery and independent replacement.
  • Damage to satellite or pin is a malfunction that can be eliminated by replacing components.
  • If an electric screwdriver does not twist under load, this indicates the improper operation of the device.
  • Damage to the shaft or bearings is another reason for poor work. During operation, the mechanism cracks and does not cope with the load.
  • Wear of internal gears also violates the functioning of the device.
  • Lack of lubrication in the gearbox. this happens if the tool is rarely used.
  • He may not work due to burning the motor winding. In such a situation, a motor replacement requires.

Determine the cause not only with a visual examination of the device, it is necessary to perform diagnostics according to the following instructions:

  • Disable the device from the network;
  • Remove the cartridge;
  • Remove the body part;
  • remove gearboxes and a fixing plate;
  • disassemble the gearbox to gain access to gears;
  • inspect each complete set, evaluate the degree of wear or detect damage;
  • replace broken details;
  • set the springs with pliers to improve the device control;
  • get to the bearings, check them, damaged. replace them;
  • Check the condition of the motor, brushes and shaft.

Bearings and gears wear out with intensive operation quickly enough, so they require periodic replacement. The battery even in high.quality technology should also be periodically replaced.

Features of the repair of electric screwdriver, if it does not twist or twists poorly

Before starting the repair, you need to prepare everything. There are several rules and recommendations that should be followed during the repair:

  • If the details are required, it is necessary to buy only original components released by the manufacturer of the tool;
  • After disassembling the tool, it is worth checking everything, since there can be several breakdowns;
  • After the repair, it is necessary to check the fixation of all parts.

Important! If you independently start repairing equipment that is still under warranty, after disassembly, the rights to free service in the service center will be lost.

If the device does not twist or work slowly, you can identify the malfunction and repair it without involving a specialist. First you need to diagnose the causes by checking all the details of the device, and then proceed to eliminate the problem. If the device is under warranty, it is recommended to contact the service center with a breakdown.

The device has broken. what actions?

There are two ways to solve the problem. First, try to eliminate the breakdown on your own, having studied information on the Internet, the second is to hand over for repairs to any of the 21 services of Yumedia. This is not the first time we have eliminated the malfunction “sparking inside and smoke an electric screwdriver” and we want to share our experience with you, to orient you at the cost and terms indicated below in the table.

Signs of the device’s electrical malfunction are:

If the battery is discharged, it must be charged or replaced with charged from the kit. 2 batteries are included in many models of screwdrivers in the kit.

The reasons why the electric screwdriver does not be charged:

DOBA breakdown is revealed by measurement voltage at the exit from the device and comparison with passport data. Voltage is usually 10.8, 12, 14.4 or 18 volts. 18V batteries are most common. over, the value of the measured voltage in the case of a good car must be slightly higher than the passport. If the voltage is less or absent, then the charger must be repaired or changed. You can repair this device yourself, but you need to understand electronics.

If everything is in order with the memory, the battery is to blame. He will either not issue voltage, or issue less than the value. For example, the Fieldmann FDUZ 50001 battery has a nominal voltage of 18 V, and gives out 10-11 volts. In this case, a slow rotation of the cartridge will be observed. It should be noted that slow rotation is caused by a mechanical malfunction. But in this case, the work of an electric screwdriver will be accompanied by a characteristic noise.

Guess that this particular knot was also out of order by its heating. Why is the battery of electrical screwdriver to explain easily. either poor electrical contact between it and the engine, or poor electrical contact inside this node, between battery banks.

Sparks, smoke, crunch and smell of Gary: what can break in a drill or electric screwdriver

You can call as much as you like that the tool is not the same today, but the manufacturers are hacking, deliberately releasing “one.time” products, but let’s look in the eyes of the truth. Modern power tools are technically complex devices, and, like any equipment, they can eventually fail. Even the simplest drills and screwdrivers have 50. 100 parts, which move and rotate, rub and wear out, heat and burn out, experience significant loads and break. There can be a dozen reasons for breakdowns: improper operation, lack of proper care, defective components, unsuccessful design, excessive loads and simply randomness. In this article, we will consider typical malfunctions of drills and screwdrivers and find out their reasons.

Diagnosis of a drill in haste

To find out exactly why your drill broke or what is wrong with an electric screwdriver, you need to give the tool for diagnostics to the service center. But there are many direct and indirect features by which you can approximately find out in which knot there were problems.

So, we briefly figured out why the drill, electric screwdriver or peorator could work poorly. Then we will consider the typical causes of malfunctions in more detail and divide them into several categories: from easily eliminated problems to cases where the repair is inappropriate.

Not a breakdown at all

Some problems with drones and screwdrivers can not even be called malfunctions. Such annoying troubles include the wear of collector brushes. Graphite brushes are consumables (sometimes drills are sold immediately with a spare kit). They are more or less standardized, often interchangeable (running dimensions are suitable for the tool of different brands) and are literally a penny. Many drifts do not even need to open the body to replace brushes. This can be done without disassembling the power tool if the manufacturer for accessing inside has provided special windows covered with plugs. A powerful power tool, such as peorators, is even equipped with indicators that suggest that it is time to engage in the replacement of coal brushes.

If the indicator is absent, then the brushes themselves will give the green to know that they have worn out. The most striking (in the literal and figurative sense) sign of wear are powerful sparks that are visible through the slots of the case and ventilation holes. An indirect feature is the work of the tool with interruptions and jerks. Sparking occurs due to the fact that the brushes are not fully pressed to the collector. Sparking is accompanied by heat release. In addition to the smoke and smell of burning, which accompany the spark, the danger lurks in the fact that due to overheating, collector plates can be deformed and disappeared from the base of the collector. That is, without changing the brush in time, you can easily “rest” the engine anchor.

The process of replacing brushes on the example of an electrical screwdriver of Dewalt.
electric, screwdriver, slowly, twists

The “visual effects” described above are almost never in drifts and screwdrivers with browned engines. They generally have many advantages over tools with traditional engines (though the price is considerable). If something lightly sparkles inside a bronnial electric screwdriver under load, then this is the engine brake (and this is quite a normal phenomenon, not a malfunction).

Almost no breakdown

There are also problems that only look scary, but can be easily eliminated on their own with a screwdriver, sandpaper and a pair of strong words addressed to the manufacturer of the tool.

Serious troubles

Some malfunctions, unlike the above, can deliver a bunch of trouble and fly into a penny.

Excessive heating of the bearing of the drill (which can sometimes be recognized by the smoke and smell of burning plastic, as well as tight rotation of the cartridge and a loud “squeak”) indicates serious problems. The part.heated part can melt the plastic case of the tool. When melting, plastic will lose its shape, and a significant backlash will appear in detail. If the bearing is not lubricated or replaced, then over time it will collapse from overheating, or the anchor will jam. In the meantime, he does not fly to pieces, he will spoil your nerves with a loud howl and select part of the engine power.

If the shock drill has stopped taking concrete and brick, then this means that its shock mechanism has completely worn out. The electric drill is not arranged like a peorator. Instead of a “drunken” bearing or crooked-shaped mechanism, she has two rates with wavy surfaces that slide on each other, providing light blows with a drill on concrete. Over time, these “waves” naturally wear out, rates turn into flat washers, and a drill or electric screwdriver, who previously knew how to drill concrete, turn into an ordinary unstressed tool. It is possible to restore work in drilling mode only by repair with replacement of worn parts. Therefore, if you need to drill concrete not time from time to time, but regularly, it is better to immediately buy a normal peorator.

Almost hopeless cases

Serious breakdowns of engines and gearboxes are almost a “verdict”. We use the word “almost”, because repair with complete restoration of the functions of the tool is still possible. But sometimes (especially in the case of a browned power tool), the cost of repair is comparable to the price of a new device.

The reasons for the engine can be:

The gearboxes in drones break due to the low quality of metal, non-cumdy gears, lack of lubrication or (which happens much more often) due to excessive loads. If the slots on the shaft are “licked” or the teeth of the gear are broken off, then the entire node needs to be sorted out or changed entirely. It is better not to disassemble the planetary gearbox of the drill or electric screwdriver (except in cases where only the replacement of the lubricant is performed), because it has a lot of small details: gears, washers and seals.

Let’s summarize

There are many reasons why the power tool can spark, smoke, buzz and vibrate when working. Many of them are associated with improper operation and excessive loads. Therefore, you need to choose screwdrivers and drills correctly, based on specific tasks and working conditions. And if you just need a good tool, then you should pay attention to the products of Bosch, Dewalt, Makita, Metabo, AEG or other company with excellent reputation. The listed manufacturers have service centers in almost every region of the country, and you can buy spare parts for drills and screwdrivers of these brands almost freely.

Purpose and properties of brushes for power tools

Brushes on an electric screwdriver of any brand, including Bosch (Bosch PRS 1200, PRS 1440, PRS 1800, Bosch GSR 14.4 in LI), Hitachi (Hitachi DS 12 DVF 3), Makita (Makita 6271 D, Makita DDF 454), Metabo, Pit and others, serve as a current conductor. They participate in the transmission of current to the rotor, thereby provide rotation. Therefore, the material for their manufacture should carry out electricity, be solid, so that under the influence of friction does not wear a lot.

Coal (graphite) brushes meet these requirements. This material in the event of the contacts of the electrical arc of the voltage is not welded to the metal. And when the motor is working, it occurs very often. Brushes on electric screwdriver should have resistance to temperature, mechanical and chemical influences, high thermal conductivity. Good brushes have a long service life, sparkle little.

You need to choose these details carefully, because they are produced in different sizes. To replace it is necessary to take products for a specific model of electric screwdriver and the same manufacturer. It must be borne in mind that with large loads and intensive work of the tool, the brushes will not last long.

Coal brushes for electric screwdriver

The causes of the defect sparkle inside and smoke

From the experience of our service engineers, we can highlight the following reasons:

  • Untimely prevention and cleaning of the device
  • Lack of protection against voltage interruptions in the network
  • Replacement of expenditure accessories
  • Non.careful study of the user’s instructions or ignoring the tips of the manufacturer.
  • Not accurate use

Bring your equipment to our service centers or call masters at home and we will repair and give a guarantee. After the faulty device will work for all 100 percent (for the full). Addresses of Yumedia services in all areas of St. Petersburg.

electric, screwdriver, slowly, twists
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