Brush change analysis of dc motor controller

When change the brush dc motor controller, should pay attention to what issues? The below small make up take you to understand. 1. Due to the different types of brush on the hardness and the current density is different, therefore, in the choice to change the brush to choose the same type of. 2. For double brush, should pay attention to when change before and after the order, and the slope is consistent, avoid the brush to beat the reversing impact. 3. A single brush when the replacement can be used directly without grinding, but the same brush arm has 2 or more brush when change to use sandpaper grinding. 4. When grinding, the radian of the new brush need according to the old brush size for grinding. 5. In brush replacement request cannot force, at the same time to brush with armature note that demand has obvious contact, and can not be forced to plug it in. Controller for dc motor brush replacement note that's the end, hope for your help.