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.

双回转机构的步进机路由TDA1521音频集成功率放大组成平衡桥式功率驱路，由计算机并行口经过锁存构成脉冲分配。

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

了步进机驱原理和方法,并设计出了一种步进机的驱路。

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

采用新型步进机调整机构及真正不停机调整计量机构。