Dual optical mechanical position tracker

Details Dual optical mechanical position tracker Dual optical mechanical position tracker

1985-06-06

1986-12-09

Roskoski, Bernard

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

318696, G05B 1940

Patent

active

046282394

ABSTRACT:
Apparatus for retaining control of moving carriage impact dot matrix print eads when subjected to strong external forces such as shock and/or vibration. Position and direction of carriage movement is provided by a photo emitter-sensor assembly and a slotted timing wheel or disc having a plurality of equally spaced slots whose slot width is equal to the slot separation. The slot width is sufficient to frame a pair of side-by-side emitters which operate in conjunction with a pair of side-by-side sensors on the other side of the timing wheel. The order or sequence in which the sensors receive photo energy from their respective emitters indicates the direction of rotation of the timing wheel while simultaneous reception of photo energy by the side-by-side sensors provides an indication of valid rest position of the carriage drive motor.

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patent: 3573589 (1971-04-01), Berry
patent: 4114750 (1978-09-01), Baeck et al.
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patent: 4279523 (1981-07-01), Ringle
patent: 4349770 (1982-09-01), Ragen
patent: 4362980 (1982-12-01), Itzkowitz
patent: 4404510 (1983-09-01), Nakajima
patent: 4429268 (1984-01-01), Yajima
patent: 4496936 (1985-01-01), Kramer

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