| 摘要 |
PURPOSE:To prevent a printing plate from being missupplied, by outputting a plate supply starting command with a timing related to the rotational phase of a plate cylinder, retrieving velocity-controlling data from a memory on a time series basis on receiving the command, and controlling the driving of a plate-supplying roller motor on the basis of the data. CONSTITUTION:A reference rotary encoder 8 is connected to a rotary shaft of a plate cylinder 1, whereby a signal Z having one pulse per rotation of the cylinder 1 and a signal A having 240 pulses/in (ppi) on the circumference of the cylinder 1 are derived as the cylinder 1 is rotated. A printing controller 9 calculates a timing required for controlling the feeding of a printing plate 3, based on the signal Z and the signal A, and supplies a motor controller 10 with a plate supply starting command. When the plate supply starting command is supplied from the printing controller 9, data stores in a PROM 12 are retrieved in the order of addresses through an address-controlling part 13 based on the timing reference signal A outputted from the rotary encoder 8, and a pulse train signal having a pulse separation according to a predetermined speed characteristic is outputted to a motor driver 11.
|
