| 摘要 |
PURPOSE:To make adaptability high and to attain the high speed, multiple function, and high precision of this copying device by generating a coincidence signal when the counted value of a photosensitive synchronizing pulse and timing data for showing timing to carry out the ON/OFF switching of a load next are in coincidence. CONSTITUTION:The timing pulse signal of the photosensitive body 4 is counted by a hard counter circuit independent from a CPU 21. When the counted value and previously set timing data are in coincidence, the coincidence signal is generated, the ON/OFF switching of a load via a latch data resistor is latched with this signal by latch circuit, and the load is controlled corresponding to the output of a relevant latch. Thus, it is unnecessary that interruption processing is executed whenever the synchronous pulse arrives, so that the synchronous pulse having high resolution (the moving amount of the photosensitive body/one pulse is small) is obtained, and high precise sequence timing control is realized. |
