The driver samples similar to the servo control principle, unique circuit design, superior software algorithm processing, so that the motor can run smoothly even under low subdivision, almost no vibration and noise, smooth and accurate current control technology greatly reduces the motor heat, external 16 speed equal Angle constant torque subdivision, up to 256 subdivision, optocoupling-isolated differential signal input, Strong anti-interference ability, with over-voltage, under-voltage, over-current protection and other error protection functions. Can be set through the host computer more than 200 any positive integer subdivision, current, logic electric equality parameters. In 3C, LED patch and other medium and high-speed applications, its stability, vibration, noise performance advantages are obvious, can greatly improve the performance of equipment.