... choose, Max current is 8A3. current control with advanced digit PID current control,with high speed andlarge torque4.Microstep 16 ... 10000, 20000, 25000 step/rotate5. speed range with appropriate stepper motor ,the speed can reach to 3000rpm6. resonance-restain can check ... intermediate frequency vibrate7.Drive power on self-checking motor parameter8. Optional motor idle current 25%,50%,75% or90%9.Self- ...