To control stepping motors, the balance bridge power drive circuit is made up by TDA1521 integrated audio power amplifier, the pulse allotter is made up by the parallel ports of computer and latches.

双回转机构的步进电机控制电路由TDA1521音频集功率放大平衡桥式功率驱电路，由计算机并过锁存构脉冲分配。

The driving principles and methods of step motor are introduced in this article and the stepmotor driver circuit is increasingly designed.

阐述了步进电机驱原理和方法,并设计出了一种步进电机的驱电路。

It features new type stepmotor control system and real metering mechanism adjustable without shutdown the machine.

采用新型步进电机调整机构及真正不停机调整计量机构。