| 摘要 |
PURPOSE:To maintain density distribution of each sheet constant by independently driving swing rollers of a machine for driving a plate cylinder to vary the swing number of the roller with respect to the rotating speed of the cylinder. CONSTITUTION:A deviation calculator 11 is so controlled to drive a servo motor 6 as to eliminate a deviation of a counted value of a present value counter 5 from a present value counter 10, and the rotating speed of a plate cylinder is rate-synchronized with that of a servo motor 6. That is, a cylinder cam 53 is rotated by the rotary force of the motor 6, a cam follower 54 is driven as to follow up it, a bar 55 is rotated at a shaft 55a as a center, and a swing roller shaft 58 is thereby reciprocated. As a result, a swing roller 50 moving integrally with the swing shaft 58 is swingingly driven in rate-synchronization with the rotating speed of the cylinder. Here, since the rate can be arbitrarily set by using a digital switch 4, the swing roller can be synchronized with the rotating speed of the machine, and the swing number can be arbitrarily set. |
