Synchronization method of photowangju period of printing press and its device

摘要

Disclosed are a method for synchronizing optical scanning of a printer and an apparatus thereof. The method of synchronizing the optical scanning of the printer includes a optical scanning unit for scanning light in the main scanning direction, the width direction of the photosensitive belt circulating in one direction along the longitudinal direction, and the optical scanning unit on the opposite side of the optical scanning unit with the photosensitive belt as the center. A printer including a photodetector for outputting an electrical signal corresponding to incident light and an optical path directed toward the edge of the photosensitive belt out of the light emitted from the unit to the light receiving window, and a printing machine including a system controller for controlling the driving of the photoreceptor unit. Set a reference line parallel to the longitudinal direction of the photosensitive belt on the photosensitive belt, and measure the horizontal distance to the edge of the reference line in a predetermined interval along the reference line and measure the horizontal distance or the horizontal distance. It is converted into the time required for the light to be scanned to progress and stored, and from the photodetector Synchronization start time of optical scanning for writing image information of the optical scanning unit is made based on the completion of the period in which the required time corresponding to the horizontal distance of the position of the scanning line of light is added to the time when the output signal of the pulse on Let's do it. According to the optical scanning system to which this method is applied, the scanning tip in the image information recording area can be matched without being affected by defects and curvatures of the photosensitive belt edge line.