1. Non-original carbon brushes were used instead. The carbon brushes were too hard or the quality did not meet the requirements.
Solution: Replace the original carbon brushes.
2. The spring pressure on the motor carbon brush is uneven. Dust-free wall sand machine and grinder.
Solution: Adjust the spring pressure appropriately to keep the pressure of each carbon brush balanced.
3. The brush handle is loose.
Solution: Tighten the brush holder bolts to make the surfaces of the brush holder and commutator parallel.
4. The distance between the brush holder and the commutator surface is too large.
Solution: Adjust the distance between the brush holder and the commutator, usually 1-3mm.
5. Dust-free wall sander with poor contact between carbon brush and collector.
Solution: The carbon brushis perhaps worn too short. Grind the contact surface of the carbon brush or replace it with a new one.
6. The carbon brush and the brush holder are not cooperating properly.
Solution: It should not be too tight or too loose. Make sure the brush can slide freely into the brush holder when hot. If it's too tight, you can use sandpaper to remove some of it. carbon brush. If it is too loose, replace it with a new carbon brush.
Detailed information:
The main function of the carbon brush is to rub against the metal while It does not conduct electricity as when metal-on-metal friction conducts electricity; when metal-to-metal friction conducts electricity, friction can increase and joints can sinter together, but carbon brushes cannot, because carbon and metal are two different ones; elements.Most of its uses are in electric motors and its shapes are various including square, round, etc.
Carbon brushes are suitable for various motors, generators and axle machines. It has good switching performance and long service life. The carbon brush is used on the commutator or slip ring of the motor. As a sliding contact body for export and incoming current, it has good electrical conductivity, thermal conductivity and lubrication properties, as well as certain mechanical strength and commutative spark instinct.
Baidu Encyclopedia-Carbon Brush