| 摘要 |
PURPOSE:To always perform ideal printing generating no positional shift even when a printing press having an error factor is used, by subjecting the theoretical predetermined running distance allowing an object to perform uniform motion to variable control on the basis of the difference between the spaced-apart length between the object and a confluent point and the theoretical spaced-apart length between both of them. CONSTITUTION:When the reference line A' on a printing cylinder arrives at the position separated, for example, by 93mm from a confluent point 0, a stepping motor STM is driven to start the movement of paper by a feed pawl (h) and the paper is subjected to initial uniformly accelerated motion. When the leading end edge B' of said paper is detected by a position sensor PS, the reference line A' reaches the position separated by 65mm from the confluent point 0 from a theoretical aspect. In actual subjecting x2 variable control on the basis of difference + or -DELTAX, for example, the speed V of an object A and the speed (v) of an object B are set to V=v, and this speed v and a speed v' are set to v'=v/2 and, when alpha=V/v' and beta=V/v are set, a theoretical predetermined value is set so as to satisfy alpha-beta=1. By this method, the shift only of + or -DELTAX is calculated by CPU and the running distance of x2 is changed to x2+ or -DELTAX. As a result, when the leading end edge B' of the paper arrives at the confluent point 0, the reference line A' of the printing cylinder also arrives at the confluent point 0. |
