Timing device for printing machines

摘要

A central timing device for controlling a plurality of working functions of a printing machine, includes a reference pulse generator, assembled to encoder discs connected to a cycle shaft of the printing machine to produce a sequence of angular increment pulses and at least one single synchronizing pulse. The reference pulse generator is connected to a pulse processing circuit which includes a first address coding device for producing binary coded addresses pertaining to angles of rotation of the machine. A second address coding device is coupled to the encoder for angular increments via a timing circuit including an AND-gate and a monostable multivibrator to produce binary coded addresses pertaining to the angle of rotation/rotary speed of the printing machine. The outputs of the first and second address generating devices are connected to addressing inputs of separate PROMs preprogrammed with desired timing signals.