... power supply , 86mm 3 phase step motor match with ME180N power supply ,max current 7.8A,microstep 1000,1600,2000,3200 ... ,4000,5000,6400,51200 available,pulse+direction control mode2 motor size 60 ... voltage 24~75VDC4 with particular current technique,reduce the current noise, no-loading motor speed can reach to 4000rpm5 motor current can be reduced half ...