Being the position gap quantitative control unit amendment the design position gap

摘要

PROBLEM TO BE SOLVED: To provide an apparatus and a method for controlling an amount of displacement, capable of controlling at a time the displacements of a pattern position caused on printed matter in a vertical direction, a horizontal direction and a twisting direction, and dealing with displacements of the pattern position that constantly change with time.;SOLUTION: The apparatus for controlling an amount of displacement corrects the amount of displacement of a pattern position on printed matter caused by a multicolor printer. The apparatus obtains picked up image data Di obtained by picking up a group LM of pattern position displacement measuring marks comprising measuring marks of different colors printed on both side ends in a horizontal direction perpendicular to the direction of conveyance of the printed matter. Based on the positions of the measuring marks, an displacement in the vertical direction parallel to the direction of conveyance of the printed matter, an displacement in the horizontal direction, and an displacement in the twisting direction diagonal to the vertical direction and the horizontal direction are measured to calculate the amount of displacement of the pattern position. Amounts of correction for the displacements are calculated and a correction signal Ds is sent to a printing unit of the multicolor printer.;COPYRIGHT: (C)2011,JPO&INPIT