| 摘要 |
PURPOSE:To eliminate the influence of the mounting positions of a slow-down position detector and an original position detector to the stopping position by energizing a reversible induction motor until a movable unit which reciprocates between two points makes contact with a stopper. CONSTITUTION:When a slow-down position is detected by a position detector 15, a DC brake 13 operates through a control circuit 8 by the detection signal, the set speed from a speed 2-step switching circuit 10 is decelerated, and a single phase induction motor 11 is decelerated. When the original position is detected by the detector 15, the set speed by the circuit 10 does not become zero simultaneously upon detection, and after the stopper makes contact with a movable unit (not shown) which reciprocates by the motor 11, it becomes zero after the lapse of extremely short time. At this time a DC brake 13 is not entirely used, but only an electromagnetic brake 14 is energized upon detection of the original position. |
