| 摘要 |
PURPOSE:To prevent the life of a photosensitive drum or an exposure head from becoming short when a chart containing a contour line which specifies an area to be drawn is depicted. CONSTITUTION:CAD data (plotter command) containing a contour and a figure is stored in an input buffer 1, and internal (intermediate) data obtained 17 an analysis part 2 is shifted in the linear direction of an ED head, based on a reference point P designated by a reference point change part 12, using a contour/figure data shift part 3. Chart data developed into bit map data by a bit map development/processing part 4, is stored in a frame buffer 5. The chart data is read sequentially by a controller 6 and then is supplied set by set to a shift register 8. A sheet replacement detection part 11 detects the replacement of a recording sheet, and a reference point change part 12 changes a reference point P stored in a storage part 10, shifting chart/figure data in the linear direction, if the part 11 detects the replacement of the sheet. |
