COPYING MACHINE AND A CONTROL SYSTEM FOR THE SAME

摘要

In a copying machine an original to be copied as well as an image element upon which an image of the original can be formed are conveyed by means of synchronous motors. A voltage supply for a first one of the synchronous motors delivers a voltage having a first A.C. voltage component. …Other A.C. voltage components are synchronously derived therefrom for driving the other synchronous motors in synchronism with the first one. Further a pulse-generator circuit is connected to the voltage supply to generate control pulses for the copying machine at a frequency proportional to the frequency of the first A.C. voltage component. In a programmable control system the control pulses may be used to interrupt a current programme for priority treatment of an interrupt programme.