Absolute signal detecting method and absolute encoder

Details Absolute signal detecting method and absolute encoder Absolute signal detecting method and absolute encoder

1995-11-20

1998-06-30

Mullen, Thomas

Communications: electrical

Continuously variable indicating

With particular transmitter

34087029, 25023114, 25023118, 341 3, 341 6, 341 11, 341 13, G08C 1900

Patent

active

057740682

ABSTRACT:
A code plate has an m-bit signal track read out in parallel for providing the starting position of an AC servo motor for commencing rotation when power is first turned ON. An n-bit signal track accompanied by an incremental signal track is provided on the code plate with the n-bit track read out serially, converted to pure binary in parallel, and used once rotation of the servo motor commences to provide the initial absolute value of the encoder. To this n-bit initial value is added signals from the incremental track upon continued rotation of the code plate.

REFERENCES:
patent: 4737187 (1988-04-01), Kibrick et al.
patent: 5231596 (1993-07-01), Nakazawa et al.
patent: 5418362 (1995-05-01), Lusby et al.
patent: 5438193 (1995-08-01), Takagi et al.
Electronic Letters, vol. 25, No. 21, Oct. 21, 1989, pp. 1436-1437.

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