Motor failure causes abnormal operation of robot such as staggering at stop, irregular twitching and noise in operation. Besides, It may cause overheating and abnormal sound.
Check the reduction gear and fulcrum bearing as well in order to determine which part causes the abnormality. It is because that similar phenomenon is observed when the reduction gear is damaged.
Diagnostics
①Check for overheating and abnormal sound. .
Resolution
①Replace the motor.