... driver model Y3SSR8,60mm 3 phase step motor match with ME120N 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& ... the current noise, no-loading motor speed can reach to 4000rpm5 motor current can be reduced half or ...