Paper feed control in a dot matrix printer

Details Paper feed control in a dot matrix printer Paper feed control in a dot matrix printer

1987-07-10

1989-05-30

Wiecking, David A.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

400568, 400902, B41J 310

Patent

active

048345644

ABSTRACT:
A paper feed control apparatus for a dot printer is provided which supplies a step pulse to a stepping motor in a one-pitch feed mode at an interval of a reference time to intermittently rotate the stepping motor in increments of a step angle, and which also supplies a step pulse to the stepping motor in a multi-pitch feed mode at an interval of a time shorter than the reference time to continuously rotate the stepping motor over a plurality of step angles. A motor drive control circuit is adapted to supply a step pulse to the stepping motor in the multi-pitch feed mode at a gradually shorted time interval, and to supply a final step pulse to the stepping motor in a final portion of a driving cycle when the reference time passes after the generation of the step pulse.

REFERENCES:
patent: 3643039 (1972-02-01), Barcomb et al.
patent: 4203678 (1980-05-01), Nordstrom et al.
patent: 4224628 (1980-09-01), Murray

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