| 摘要 |
A drive device for an optical system which is reciprocated by a motor controlled for drive and stop with availability and unavailability of power supply. In order to avoid any collision of the optical system moving under the influence of its inertia with adjacent devices the drive device comprises: position sensing means for sensing a position of the optical system on the rails; stop command sensing means for sensing a signal of stop command of the power supply; and stop control means for controlling for reversal braking of the motor according to the position of the optical system sensed by the position sensing means when a signal of the stop command is sensed, for returning the optical system within the specified area and for stopping it. <IMAGE> |
