This paper simply discusses the micro - step control principles of stepping motors, and designs the micro - step drive system realized by single - chip processors PIC16 C621, digital control potentiometer X9312 and MOSFET IRFP250 etc.

• 简要论述了步进电机微步控制的工作原理，设计了用单片机PIC16C621。 数控电位器X9312和MOSFET功率管IRYP250等实现的步进电机微步驱动系统。