| 摘要 |
PURPOSE:To prevent hunting of a mover in the vicinity of a stop position by rotating a driving motor for the mover in normal and reverse directions in such a manner that the driving time is gradually shortened in order to make the mover be stationary within the stop permissible range. CONSTITUTION:When a mover is moved by a driving motor to reach the stop permissible range L, after the lapse of a fixed time T0 from the point of time the mover reaches the range, the driving motor is stopped. If the mover overruns the stop permissible range L at this time, the driving motor is reversed to move the mover for a fixed time T1. The moving time T1 at this time is shorter than the time T0, and subsequently, the driving motor is repeatedly rotated in the mormal and reverse directions in such a manner that the driving time is gradually shortened until the stopped mover is positioned within the stop permissible range L. |
