步进电机加减速运行程序 步进电机启动时，转速由慢到快逐步加速。 步进电机匀速运行 步进电机由快到慢逐步减速到停止-Stepper motor speed stepper motor to start running the program, the speed gradually from slow to fast to accelerate. Uniform operation of stepper motor stepper motor from coming slowly an