GSK DAP03 AC Spindle Servo Drive Servo ... the external contact selects the orientation point, start motor(spindle) orientation, orientation angle deviation≤Spindle position ... orientation completion, zero speed output, speed/position switch, motor Z pulseProtection functionProtection from overvoltage, undervoltage, overspeed, overcurrent, ... without the spindle encoder. DAP03 AC Spindle Servo Driver