After why stepper motor power, motor is not running? There are several reasons can cause motor does not turn: 1, overload locked-rotor (The motor is whistlers)2, 3 if motor in the offline state, if there is a pulse signal control system for stepper motor drives, stepper motor jitter wiring whether there is a problem, can't run continuously, how to do? Encounter this kind of situation, first of all, to check the motor winding is connected to the drive if there is any wrong check whether the input pulse signal frequency is too high, whether lifting frequency design is not reasonable. the main products: stepper motor, brushless motor, servo motor, stepping motor drive, brake motor, linear motor and other kinds of models of the stepper motor, welcome to inquire. Telephone: