步进电机是将电脉冲信号转变为角位移或线位移的开环控制元件。在非超载的情况下，电机的转速、停止的位置只取决于脉冲信号的频率和脉冲数，而不受负载变化的影响，即给电机加一个脉冲信号，电机则转过一个步距角-Stepper motor is the electric pulse signal into angular displacement or linear displacement of the open-loop control components. In the case of non-overloaded, the motor speed, stopping only depends on the location of pulse frequency and pulse number, regardless of load changes, that is, to add a pulse motor, the motor is turned a step angle