| 摘要 |
A timing adjustment system in a copying machine includes a slit plate secured to a shaft of a photosensitive drum for developing a pulse signal of a period (t') in response to the rotation of the photosensitive drum. A copy paper supply system is enabled when a predetermined time has passed after an optical system initiates the movement. The predetermined time is determined by a pulse number (N) of the pulse signal and a time period (T) from the development of the N-th pulse signal. That is, the actual copy paper supply is conducted when (Nxt'+T) has passed after the optical system initiated the movement. A modification preset system is provided for modifying the pulse number (N) to (Nm) and the time period (T) to (Tm) by taking account of the actual copying operation.
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