| 摘要 |
PURPOSE:To save electric power by intercepting the supply from an energizing power source to a pulse motor according to the output of a timer when copying operation is not performed for a prescribed time or longer. CONSTITUTION:When the copying switch on a console panel is turned on, a microprocessor 48 judges the starting of drive by inputting a copy starting signal and a rotational direction specifying signal to operate a timer 43 according to data in an ROM42, and thus energizing switching timing pulses are generated to energize coils 251- of a pulse motor 25 successively, driving an optical system. On the other hand, every time the copy starting signal is supplied to the microprocessor 48, the operation of a timer is started and if a succeeding copy starting signal is not supplied a prescribed time after the starting of the operation, the timer 44 outputs a time-up signal to turn off a switch 27 by the signal, thus powering down the pulse motor 25. |
