| 摘要 |
PURPOSE:To improve the variable power operability by stopping an optical system which is being driven in accordance with a first instructed magnification at other magnification position which is instructed in the end. CONSTITUTION:By an unmagnification operation, an FF1 and an FF2 are set, a lamp display L1 is turned on through the FF1, a transistor TR Q2 is turned on by a set output of the FF2 and a motor M is rotated forward through a relay RA1, and an optical system is driven. When a variable power key is operated in the course of driving said system, the FF1 is reset and the lamp L1 is turned off and also an AND gate G1 is opened and an FF3 is set by an output of the FF3 passing through an inverter IN1 and a lamp L2 is turned on. When a sensor S1 detects a stop position of the optical system at the time of unmagnification an AND gate G4 is not formed and the FF2 is reset and also an AND gate G2 is formed and an FF4 is set and the motor M is rotated backward. In the same way, the optical system is moved and stopped at a magnification position which has been instructed in the end and a variable power instruction can be executed without waiting for a stop of the optical system by the previous instruction, by which the variable power operability can be improved. |
