... , over-current, low-voltage Special Control CircuitOptically Isolated Signal I/O Bipolar constant current chopping modeApplicationsEngraving machine, Labeling machine, Spray painting ... , Metallurgical furnace, Semiconductor equipment etc.Microstep Setting TablePulses/rotation8003200640012800D4ONOFFONOFFD3ONONOFFOFFD2NULLD1NULL cheap price stepper motor drives