Variable print speed control

Details Variable print speed control Variable print speed control

1977-07-29

1979-10-02

Rubinson, Gene Z.

Electricity: motive power systems

Positional servo systems

Pulse-width modulated power input to motor

318603, 400320, 400322, G05B 1128

Patent

active

041699912

ABSTRACT:
The carrier for the print head of a printer which is to be used at different operating speeds as a display printer, as a read-only printer, or as a keyboard display printer with asynchronous character rates over a wide range, is operated by a servo motor under the control of a digital/analog converter which continually sums the outputs of an up/down counter which is incremented by incoming data and decremented by the output of a shift register advanced by the incoming data.

REFERENCES:
patent: 2867724 (1959-01-01), Olson
patent: 3496547 (1970-02-01), Gorrill et al.
patent: 3761880 (1973-09-01), Kritz et al.
patent: 3950682 (1976-04-01), Dohanich et al.
patent: 3950685 (1976-04-01), Kramer
patent: 3986091 (1976-10-01), Quiogue et al.
patent: 3990559 (1976-11-01), Martin et al.

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