Step motor control, by pulse by changing the order of electricity can change the motor rotation direction, change the pulse frequency can change the motor rotation speed.

步进电机受脉冲的控制，通过改变通电的顺序可改变电机的旋转方向，改变脉冲的频率可改变电机的旋转速度。

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Based on this method, the accurate control pulses are generated from the PC timer and used for driving the step motor to realize a wide range speed control smoothly.

基于该方案，通过截用PC机系统的定时器资源产生精确定时的控制脉冲，使步进电机实现宽广范围内的速度平滑控制。

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This step is the main, first to control the temperature, time and liquid zinc plating steel plate is removed from the liquid zinc in speed.

这一步最为主要，首先要操控好锌液温度、浸镀时刻及钢板从锌液中移出的速度。

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