| 摘要 |
PURPOSE:To enable copying speed to be maintained constant by comparing the 1- cycle time of copying measured by a position detecting means and a reference cycle time and increasing or decreasing an exposure terminal changeover time according to the difference of these values. CONSTITUTION:In continuous copying, the 1st mirror 3 moves together with a bracket 10 to an arrow G direction and when a position detecting member A crosses the position detecting member B in the detecting position P2, the instant Q6 is detected. The time from the instant Q5 up to Q6, that is, real copying cycle time DELTAt is calculated by a built-in microcomputer, and further it is compared with the reference copying cycle time DELTAt0 having beforehand been stored and the difference DELTAt-DELTAt0 is calculated. In the next copying, the exposure end changeover time t1 or initial standby time t2 is increased or decreased so as to make this difference zero, whereby the copying speed is controlled. |
