Instrument mounting system with dual encoders

Details Instrument mounting system with dual encoders Instrument mounting system with dual encoders

2007-06-05

2007-06-05

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system

Orientation or position

C359S429000, C359S399000, C318S266000, C318S625000, C318S011000, C318S012000, C318S015000

Reexamination Certificate

active

10922118

ABSTRACT:
The present invention provides a way to measure the position of an instrument that is mounted on an instrument shaft within a clutched mounting system, the instrument shaft being driven through a reduction gearbox by a motor shaft. The position of the instrument is measured as a function of the position of the motor shaft and the position of the instrument shaft, the measurement of the position of the motor shaft providing greater precision than the position of the instrument shaft. Because the mounting system is clutched, it is necessary to check at intervals whether the measurement of the motor shaft position no longer accurately represents the position of the instrument, in which case the measurement of the motor shaft position is resynchronized to the measurement of the instrument shaft.

REFERENCES:
patent: 3946298 (1976-03-01), van de Loo
patent: 5101143 (1992-03-01), Eba
patent: 6304376 (2001-10-01), Baun et al.
patent: 6392799 (2002-05-01), Baun et al.
patent: 6492806 (2002-12-01), Shirai
patent: 6563636 (2003-05-01), Baun et al.
patent: 6600308 (2003-07-01), Shirai et al.
patent: 6603602 (2003-08-01), McWilliams
patent: 2001/0033416 (2001-10-01), Baun et al.
Celestron 8 ULTIMA 2000 Instruction Manual; Mar. 1998; pp. 1-126; Celestron International, Torrance, California 90503.

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