| 摘要 |
PURPOSE:To obtain a satisfactory starting characteristic without enlarging the device by disconnecting a position loop corresponding to control velocity or a monochromatic mode. CONSTITUTION:This device is composed of a first mirror 103, second mirror 104, third mirror 105 and lens 106 or the like, and when exposing an original image onto a photosensitive object 110 by moving a scanner while providing a velocity loop and the position loop at a servo motor for the drive, the position loop is disconnected from a control system corresponding to the control velocity so as to improve the starting characteristic without changing an approach run position. This control is enabled even in the monochromatic mode as well. |
