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Proceedings Paper

Methods for measuring and reducing slippage of friction rollers employed in off-axis couplings of position encoders to telescopes
Author(s): Robert I. Kibrick; Steven L. Allen
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Paper Abstract

Instrumentation and procedures developed for the study of friction-roller slippage in off-axis couplings of telescope position encoders are presented, and the designs of rollers and their mountings are examined with a view to the characterization of adjustment techniques yielding optimal alignment of the rollers to minimize slippage. Attention is given to the use of various types of fiducials, including GEO satellites and inexpensive optoelectronic sensors, to gather measures of both telescope-position encoder repeatability and telescope hysteresis which are independent of the telescope-pointing model.

Paper Details

Date Published: 1 July 1990
PDF: 13 pages
Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); doi: 10.1117/12.19251
Show Author Affiliations
Robert I. Kibrick, Lick Observatory/Univ. of California, Santa Cruz (United States)
Steven L. Allen, Lick Observatory/Univ. of California, Santa Cruz (United States)


Published in SPIE Proceedings Vol. 1236:
Advanced Technology Optical Telescopes IV
Lawrence D. Barr, Editor(s)

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