| 摘要 |
PURPOSE:To detect the disorder of pulse motors by using the pulse motors in order to move an easel and a lens and providing rotating position detectors which detect the rotating positions of the pulse motors and a microcomputer. CONSTITUTION:This is a device of vertically moving an easel 17 contg. a photosensitive material by driving a pulse motor 27 for easel along stanchions, and performing focusing by driving a pulse motor 8 for lens, wherein the rotating positions of the respective pulse motors 27, 8 are detected respectively by rotating position detectors 34, 36, and the numbers of pulses corresponding to the moving positions of the easel 17 and the lens 3 are calculated by adding the pulse signals during forward running and subtracting the pulse signals during subtracting. These operated values are stored in a microcomputer 33, and whether the number of pulses at the point of the time when the position signals of the detectors 34, 36 is in a prescribed position or not is decided. |
