How to detect the rotor of power tools?
Rotor spark. 1) the carbon brush and commutator rotor, no free contact. 2) the connection spring on the carbon brush nest is burned, and the person who is burned is not able to connect normally. A vicious circle, sparks plus sparks. Machine failure will also occur.
Rotor inspection. 1) a self made short circuit device can detect damage. 2) you can detect with a pointer type multimeter.
The rotor has no force. Most of them are burned out of the rotor, and many rotors can be removed if they are removed. One can distinguish, such as commutator commutator shedding, excessive wear. Have the commutator between electrodes and arc erosion serious. Rotor winding, inhaled by the fan, damage caused by damage to the rotor.
