1. The carbon brush is worn
Since carbon brushes are a friction material, they will inevitably wear out after long-term use. When the carbon brush is worn to a certain extent, its working efficiency will be significantly reduced, or even unable to work normally. At this time, the carbon brush should be replaced in time to ensure the normal operation of the equipment.
2. Poor contact of carbon brushes
The carbon brush is generally in contact with the motor rotor through the elastic carbon brush blade, and if the carbon brush blade is aged or elastic enough, it is easy to lead to poor contact. In addition, dust and dirt can also affect the contact between the carbon brush blades and the rotor. At this time, the surface of the carbon brush and the motor rotor can be gently wiped with fine sandpaper to remove surface oxides and loose dirt, and increase the contact area.
3. Carbon brush heating
Some tools will have the problem of carbon brushes heating up when they are in use. This is usually caused by the small contact area between the carbon brush and the rotating part, or the poor quality of the carbon brush material and the increased resistance. If the carbon brush is found to be hot during use, it should be stopped immediately, and the carbon brush should be checked and replaced to avoid subsequent losses.
4. Carbon brush life
The service life of different brands and specifications of carbon brushes is different, but no matter what type, they need to be checked regularly and replaced in time. If the equipment has not been used for a long time, it is best to remove the carbon brush for storage first to avoid aging and deformation.
