Encoder runout error correction circuit

Coded data generation or conversion – Digital pattern reading type converter – Incremental

Reexamination Certificate

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Details

C341S017000, C341S001000, C250S231130, C250S210000, C250S210000

Reexamination Certificate

active

10847153

ABSTRACT:
A novel encoder system adapted for use in print architecture at least includes: a codewheel coupled to a rotating print architecture element; a first encoder sensor mounted at a first position relative to the periphery of the codewheel, the first encoder adapted to output a first output signal; a second sensor mounted at a second position relative to the periphery of the codewheel, the second encoder adapted to output a second output signal, and the second sensor positioned substantially 180 degrees relative to the first encoder sensor; and a logic correction circuit adapted to receive the first and second output signals, and for outputting a correction signal with a period that is the average of the periods of the first and second output signals.

REFERENCES:
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patent: 6639207 (2003-10-01), Yamamoto et al.
patent: 6646571 (2003-11-01), Soar et al.
patent: 6972403 (2005-12-01), Martenson et al.
patent: 7060969 (2006-06-01), Uchiyama et al.
patent: 7091883 (2006-08-01), Kunow et al.
patent: 7126107 (2006-10-01), Ahne et al.
patent: 7129858 (2006-10-01), Ferran et al.

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