公开(公告)号：CA1126083A

公开(公告)日：1982-06-22

申请号：CA365433

申请日：1980-11-25

Applicant: IBM

Inventor： DAVIS GLENN W ,  FLEEK ARTHUR E

IPC: G06F3/12 ,  B41J5/30 ,  B41J19/20 ,  B41J19/76 ,  B41J29/38 ,  G06K15/00 ,  G06K15/08 ,  B41J11/42

Abstract: A control system for the carriage drive of a line printer includes a microprocessor which controls a carriage drive stepper motor through programmable timers and interface adapter along with other non-print units of a printer mechanism. A control counter in the carriage drive responsive to feedback pulses from the stepper motor coacts with the timers to control various operation of the stepper motor during line feeding of a print medium and is used by the microprocessor for preventing loss of control of the carriage drive due to interrupts from other devices. EN979016