| 摘要 |
PURPOSE:To improve the accuracy of film stop position by counting the perforations of a film and lowering the film speed when the count number attains a prescribed number. CONSTITUTION:The 2nd, 3rd bit outputs are inputted from a counter CNT to a NAND circuit NAND1, and pulses are inputted from an oscillator OSC. The outputs of an FF1 are fed to buffers A1. A2 through an AND circuit AND1 until the content of a counter CNT goes to 6 upon ending of shutter operation, by which a motor M is run at a full speed. Until the content of the counter CNT goes from 6 to 8, the pulses from the oscillator OSC are inverted by the circuit NAND1, and the motor M is controlled, by which the traveling speed of a film F is lowered. When the content of the counter CNT goes 8 in the state of the lowered speed of the film F, the FF1 inverts to stop the motor; at the same time, the electromagnetic brake is applied to stop the film F. With such constitution, the accuracy of film stop position is improved. |
