What s wrong with the hand mill not turning?

Question 1, after long-term use of the crimping card is not unscrewed [copper wire broken] 2 Is there a problem with the switch, 3 whether the carbon brush is still there, this is a conventional problem, and then the rotor is broken, maintenance method, 1 remove the outer cover, remove the wire, electric pen test, whether there is a broken wire, 2 remove the switch directly, turn the switch is broken, 3 check whether the carbon brush is still there.

Hand mill does not rotate has the following problems:

1. After long-term use, whether the copper wire is broken at the crimping card, 2. Whether there is a problem with the switch, 3. Whether the carbon brush is still there, this is a conventional problem, and then the rotor is broken, maintenance methods:

1. Remove the outer cover, remove the wire, test the electric pen, whether there is a broken wire, 2. Remove the switch directly, if you turn it, the switch is broken.

You don't have to take it apart! If you are sure that the carbon brush is in good contact with the rotor or that the switching performance is good, then you can use the resistance level of the multimeter to detect it. Touch the two pens to the two copper plates of the power cord plug respectively, turn on the switch, and if you use the resistance value, it should be able to turn.

If there is no resistance value, it means that the circuit is not working. One is the disconnection of the stator; In is that the rotor is not good or the contact is poor; With the switch on, turn the rotor with your hand and try it! In addition, if you suspect that there is something wrong with the small capacitor, you can simply cut it off.

It's okay if you don't use it like him!

Hello, I am happy to answer for you, the maintenance method is as follows, prepare the grinder that needs to be repaired, and the tools to be used in the maintenance process are a Phillips screwdriver, a flathead screwdriver. 2 8 First unscrew all the screws on the shell of the grinder and put them aside, don't lose them, and install them back later. 3 8 There is a snap ring on the back of the electric grinder, take it off first, and then open the case.

After 4 8 is opened, we can see that there is a lot of dirt inside the machine, so we can clean it up a little.5 8 Use a flathead screwdriver to remove the screws on the white power connector, put it aside, and set it aside. 6 8 Remove the two broken power cords and replace them with two new power cords 7 8 Screw back on, fix the power cord, and pull it by hand to check if it is fixed. 8 8 Tidy up the internal wires, close the cover, plug in the power supply and try it, if it is okay, just reinstall all the screws back.

Hope it helps you and I wish you a happy life.

The angle grinder does not rotate because of the following faults: 1. The power supply can be disconnected and the power supply can be repaired. 2. The joints of the angle grinder are loose and check whether all the joints are correct.

3. The switch needs to be repaired or replaced if the contact is poor. 4. The brush and the commutator surface do not touch and replace the carbon brush. 5. The switch contact is burned out and the switch needs to be repaired or replaced.

6. The mechanical parts are stuck, check the reassembly of the mechanical parts, etc. Extended Information: Tips for using angle grinders:

1. Check whether the angle grinder has a protective cover: Before use, be sure to check whether the angle grinder has a protective cover, whether the protective cover is stable, and whether the grinding disc of the angle grinder is installed steadily. 2. Do not use defective grinding wheels:

It is strictly forbidden to use a broken grinding wheel, and when cutting, it should prevent sparks from splashing, prevent splashing others, and keep away from flammable and explosive materials. 3. Dress when using: wear protective eye masks, wear appropriate work clothes, do not wear loose work clothes, do not wear jewelry or long hair, and it is strictly forbidden to wear gloves and cufflinks without buttoning.

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The angle grinder can be checked from the following aspects: 1Check whether the wiring points are plugged in and whether the terminals are loose.

2 Check to see if the stator and rotor are broken. Use a multimeter to measure whether the resistance of the two stator coils matches. 3 Check if the capacitance is normal.

4 Check if the bearing is flexible. 5 Check if the switch is normal. 6 Check the power cord and plug for damage.

Angle grinder fault classification:

1) Mechanical failure (2) Circuit failure.

Overhaul of angle grinder:

1) Common mechanical failures: Damaged or worn gears, damaged bearings. In order to be safe, after pulling out the power plug, use your hand to dial the grinding disc or shaft, if the rotor can rotate smoothly, the mechanical part is basically normal, if there is abnormal noise or jamming, it means that the gear or bearing is poorly lubricated and damaged, and it needs to be disassembled and cleaned and filled with grease or replaced with new accessories.

2) Common circuit faults: Damaged plug Broken open power cord Damaged switch Exhausted carbon brush or not in good contact with the commutator Damaged carbon brush cap or brush socket Damaged commutator Short circuit or open circuit of rotor and stator coil Poor contact at the line plug joint.

It is recommended that you focus on checking whether the carbon brush is in good contact with the rotor commutator, whether all plug-in wires and switches are good, whether the commutator is damaged, and whether the rotor and stator coils have been broken. Or follow the common faults in (1) and (2) for step-by-step detection.

There is nothing wrong with the angle grinder carbon brush, first check the power cord, then the switch, the switch is also good! You can use the plug of the multimeter angle grinder to press the switch to see if there is resistance, if not, most of the windings are burned out, you have to disassemble the angle grinder to observe the inside, to see if the commutator or something is damaged? The resistance value of the rotor winding and stator winding are measured separately.

The angle grinder is generally a brush motor, working normally means that its circuit is not a big problem, generally the brush, that is, the carbon brush after a long time of wear, it can not reach the electrode, so there is a phenomenon of stoppage or poor contact, unscrew the carbon brush protection cover, take it out to see if the carbon brush is very short, change a new one, generally a pair, and then change the angle grinder carbon brush to power off, do not be electrocuted.

Angle grinder fault classification:

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The rechargeable type is not working when it is turned on, and it will not turn after a while.

Grinding wheel bearing damage: If the grinding wheel bearing is damaged, the grinding wheel above will not be able to rotate freely. This is usually caused by wear, aging or damage to the bearings.

2.The gap between the upper and lower grinding wheels is too small: If the gap between the upper and lower grinding wheels is too small, this will prevent the upper grinding wheel from rotating freely.

Please check that the gap between the grinding wheels is correct. 3.Grinding disc damage:

The grinding disc is one of the main components of a stone grinder, and if the grinding disc is damaged, it may prevent the grinding wheel above from rotating freely. 4.Driveline failure:

If your stone mill is powered by a drivetrain, a drivetrain failure may prevent the grinding wheels above from spinning freely. If you are unable to solve the problem, it is best to contact a professional technician for inspection and repair.

Hello! May I ask what is the reason why my stone mill turns below and can't turn on top.

If the grinding wheel bearing is damaged, the grinding wheel on top will rotate freely without wheel trapping. This is usually caused by wear, aging or damage to the bearings. 2.

The gap between the upper and lower grinding wheels is too small: If the gap between the upper and lower grinding wheels is too small, this will prevent the upper grinding wheel from rotating freely. Please check that the gap between the grinding wheels is correct.

3.Damaged grinding disc: The grinding disc is one of the main components of a stone grinder, and if the grinding disc is damaged, it may prevent the grinding wheel above from spinning and slipping freely.

4.Driveline failure: If your stone mill is driven by a drivetrain, a driveline failure may prevent the grinding wheels above from spinning freely.

If you are unable to solve the problem, it is best to contact a professional technician for inspection and repair.

Kiss, 1Motor failure: If the stone mill does not rotate, it may be a motor failure, which may be a motor winding break, insulation damage or failure, motor bearing damage, motor stator winding burning, motor stator winding short-circuit, etc.

2.Damage to transmission components: If the stone mill does not rotate, it may be that the transmission parts are damaged, such as broken gears, damaged bearings, broken belts, oil leakage of oil seals of the reducer, etc.

3.Control system failure: If the stone mill does not rotate, it may be a failure of the control system, such as controller failure, electromagnetic contactor damage, and button switch damage.

4.Lack of lubricating oil: If the stone mill does not rotate, it may be due to insufficient lubricating oil, insufficient oil quantity, oil stool stove rubber road blockage, oil quality change, oil deterioration, etc.

5.Other reasons: The stone mill may not rotate due to unstable power supply voltage, high temperature, aging insulation, poor sealing, etc. Next to dates.

Pro, the general reasons are: 1. The motor and relay are burned out: check whether the motor and relay are burned out, if they are burned out, they need to be replaced.

2. Incorrect wiring: Check whether the wiring of the stone mill is correct, if not, it needs to be replaced. 3. Insufficient power supply

Check that the power supply of the stone mill is sufficient, if it is insufficient, it needs to be replaced. 4. Bearing damage: check whether the land dust lead bearing of the stone mill machine is damaged, if damaged, it needs to be replaced.

5. Fan damage: Check whether the fan of the stone mill is damaged, if it is damaged, it needs to be replaced. Workaround:

1. Replace the burned out motor and relay; 2. Rewiring; 3. Replace the power supply with higher power; 4. Replace the bearing; 5. Replace the fan.