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Proceedings Paper

Dome shutter failure causes longest shutdown (67-nights) ever recorded by CFHT Observatory
Author(s): Ivan A. Look; Derrick Salmon; Steve Bauman; Kevin Ho; Casey Elizares
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Paper Abstract

The dome shutter drive system for the CFHT observatory experienced two, separate, catastrophic failures recently (15 DEC 11) and (14 APR 12); leading to a full-blown, company-wide investigation to understand and determine the root cause of both failures. Multiple resources were utilized to detect and reveal clues to help determine the cause of failure. Former colleagues were consulted, video footage investigated, ammeter plots dissected, solid models developed, forensic analysis of failed parts performed, controller mock-up established; all in an attempt to gather data, better understand the system, and develop a clear path solution to resurrect the shutter and return it to normal operation. My paper will attempt to describe in detail the problems encountered, investigations performed, analysis developed, and solutions integrated.

Paper Details

Date Published: 22 July 2014
PDF: 10 pages
Proc. SPIE 9145, Ground-based and Airborne Telescopes V, 91453W (22 July 2014); doi: 10.1117/12.2054779
Show Author Affiliations
Ivan A. Look, Canada-France-Hawaii Telescope (United States)
Derrick Salmon, Canada-France-Hawaii Telescope (United States)
Steve Bauman, Canada-France-Hawaii Telescope (United States)
Kevin Ho, Canada-France-Hawaii Telescope (United States)
Casey Elizares, Canada-France-Hawaii Telescope (United States)

Published in SPIE Proceedings Vol. 9145:
Ground-based and Airborne Telescopes V
Larry M. Stepp; Roberto Gilmozzi; Helen J. Hall, Editor(s)

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