SPINDLE ORIENTATION CONTROLLER.

摘要

Speed pulses for detecting the rotating speed of the motor are used as position pulses, and a speed instruction value is decreased by the amount of feedback pulses. When the speed instruction value of the main spindle decreases to a predetermined level, the instruction value is clamped at that level. When the signal (LS) from the main spindle is detected in the clamped state, the signal (MS) from the main spindle is used as a speed instruction value. This makes it possible to stop the main spindle in position quickly.