按键S19可控制步进电机1的转动停止、加减速和正反转，按按键S20可控制步进电机2的转动停止、加减速和正反转。-The two stepper motor control procedures

本设计采用AT89S52单片机为主控制器设计出一种基于PWM波控制直流电机的调速系统，通过微机和驱动电路可以实现电机的正反转，加减速调整-This design uses AT89S52 microcontroller-based controller design based on PWM wave control DC motor speed control system, through the computer and the drive circuit can be achieved

步进电机（带驱动器，可加减速）,51mcuCHENG XU-STEP MOTOR