| 摘要 |
PURPOSE:To execute exactly a scanning variable power operation by providing separately the first scanning member and the second scanning member. CONSTITUTION:When scanning an original, a command of the number of steps of a motor is outputted to a controlling circuit 41 from a computer 40, and in the controlling circuit 41, an energizing command pulse to each coil of the motor is distributed, amplified by a driving circuit 42, the first motor 24 is driven, also the energizing command pulse outputted from the controlling circuit 41 branches from a route, divided into 1/2 by a frequency dividing circuit 43, its output pulse is amplified by a driving circuit 44, and the second motor 29 is amplified. Subsequently, at the time of a variable power, until a sensor corresponding to a set magnification detects an actuator 30 provided on the second scanning member 25, the second scanning member 25 is moved by driving the second motor through a controlling circuit 45 and the driving circuit 44 in the same way by a command of the computer, and when the corresponding sensor detects the actuator 30, the computer 40 inputs its detecting signal and commands a driving stop. |
