| 摘要 |
PURPOSE:To correct automatically an angle shift by receiving an original coordinate signal and a layout sheet coordinate signal by an input, deriving an angle made by a straight line for connecting the respective two points and an (x) axis, deriving an angle difference made by both straight lines, and executing a control of a direction for eliminating the angle shift. CONSTITUTION:A relative coordinate of a set position on a finished layout sheet, on an original 7 stuck to a plane scanner plate 8 is detected by a relative coordinate detector 2, and by receiving this detecting result, an original coordinate signal generating circuit 4 generates an original coordinate signal 4'. An angle shift signal operating circuit 5 receives these original coordinate signals and a layout sheet coordinate signal 9 by an input, derives an angle made by the respective straight lines and an (x) axis, also derives a difference of angles corresponding to two straight lines, and sends a signal corresponding to this angle shift theta to a rotation command outputting circuit 6 of the next stage. The rotation command outputting circuit 6 sends out a control command signal 6' of a direction for eliminating this angle shift theta, to a rotation driving device 3. The rotation driving device receives it, and drives to rotate a plane scanner plate 8 stacking with the original 7. In this way, as for the original 7 and the plane scanner plate 8, a rotation angle shift to a finished layout sheet 10 is corrected. |
