步进电动机是纯粹的数字控制电动机，它将电脉冲信号转变为角位移，即给一个脉冲，步进电机就转一个角度，因此非常合适单片机控制，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，电机则转过一个步距角，同时步进电机只有周期性的无累积误差，精度高。-Stepper motor is a pure digital control electric motors, electrical pulse signal will be transformed into angular displacement, that is, to a pulse, a stepper motor on the transfer point of view, SCM is therefore very appropriate, in the non-overloaded case, the motor speed, and stop depending on the location of only pulse frequency and pulse number, and not subject to load changes, motor is a step angle turn at the same time stepping motors only cyclical non-cumulative error and high accuracy.