13 December 2002 DEIMOS Rotation Control System Software
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Abstract
The Deep Imaging Multi-Object Spectrograph (DEIMOS)was delivered to the Keck II telescope during February 2002, and has been commissioned in the several months since then. Most of the instrument is in a barrel that rests on a cradle at the Nasmyth focus, and rotates to track field rotation. This paper describes the architecture of the rotator control software, including the communications protocols, time synchronization with the telescope control software, methods adopted for meeting the real-time control requirements, safety issues for a multi-ton rotating mass, and unusual position encoder challenges.
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William T. S. Deich, William T. S. Deich, Robert I. Kibrick, Robert I. Kibrick, Sandra M. Faber, Sandra M. Faber, De A. Clarke, De A. Clarke, Vernon Wallace, Vernon Wallace, } "DEIMOS Rotation Control System Software", Proc. SPIE 4848, Advanced Telescope and Instrumentation Control Software II, (13 December 2002); doi: 10.1117/12.461351; https://doi.org/10.1117/12.461351
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