CONTROL SYSTEM FOR STOPPING SPINDLE AT PREDETERMINED ROTATIONAL POSITION

摘要

The arrangement permits the spindle to be stopped at a predetermined position in the same amount of time that is required when no reduction in speed takes place between the motor and spindle. The position deviation signal varies in dependence on the gear ratio of the spindle gear mechanism. positioning gain, which is obtained by dividing the speed of the spindle motor by an amount of spindle motor rotation that depends on the position deviation of the spindle, is controlled so that it remains constant regardless of the speed change ratio between the spindle and spindle motor as determined by the gear mechanism.