Printer system having microprocessor control

Details Printer system having microprocessor control Printer system having microprocessor control

1980-01-28

1981-07-07

Coven, Edward M.

Typewriting machines

Sheet or web

Including programmed-control-system for record-medium feed

400583, 364900, 364111, B41J 1142

Patent

active

042771919

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.

REFERENCES:
patent: 3777128 (1973-12-01), Kirkham
patent: 3958224 (1976-05-01), Boyd et al.
patent: 3963110 (1976-06-01), Hyland et al.
patent: 4085837 (1978-04-01), Takano et al.
patent: 4146922 (1979-03-01), Brown et al.
patent: 4153945 (1979-05-01), Actor et al.
Hays et al., IBM Tech. Discl. Bulletin, vol. 22, No. 1, Jun. 1979, pp. 269-271.

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