Servo control of the movable stages using PMAC controllers for the W.M. Keck Telescope adaptive optics system

Details Servo control of the movable stages using PMAC controllers for the W.M. Keck Telescope adaptive optics system Servo control of the movable stages using PMAC controllers for the W.M. Keck Telescope adaptive optics system

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3351..320h&link_type=abstract

Proc. SPIE Vol. 3351, p. 320-330, Telescope Control Systems III, Hilton Lewis; Ed.

Physics

Optics

Scientific paper

The adaptive optics system design for the W. M. Keck Telescope incorporates over twenty tracking and movable stages on the optical bench. This paper presents a commercial solution for controlling and positioning these stages. It describes the hardware system and the EPICS software interface used to communicate with the off the shelf hardware controllers. It touches on the positional accuracy and repeatability requirements and the selection of hardware to meet those requirements. It examines the cost and packaging issues and tradeoffs between developing custom hardware and software versus commercially available equipment. A method of synchronizing the stages to absolute time for telescope tracking is also presented.

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