Current setting can be freely selected between the rate values,and current automatically halves when at rest. Pulses response frequency can reach up to 250KHZ,and it have protections functions such as overvoltages,undervoltages,and short circuits. Driver integrates automatic parameters tuning function internally,which can automatically adjust the great operating parameters for different motors and maximizes the of the motors. Using 32-bit digital signals processing,it is possible to set subdivision within 25600 and any multiple current values within the rate current. The use of builted-in segmentation technology greatly improves the smoothness and noise under low segmentation.