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The hardware control system for WEAVE at the William Herschel Telescope
Author(s): Jose Miguel Delgado; Saúl Menéndez Mendoza; Jose Alonso Burgal; Jose Miguel Herreros; Sergio Picó; Don Carlos Abrams; Carlos Martin; Diego Cano; F. J. Gribbin; Jure Skvarč; Kevin Dee; Emilie Lhome; Gavin Dalton; Kevin Middleton; Scott Trager; J. Alfonso L. Aguerri; Piercarlo Bonifacio; Antonella Vallenari; Esperanza Carrasco
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Paper Abstract

When an alt-azimuth telescope is tracking at a specific field, it is necessary to use a de-rotator system to compensate the Earth’s rotation of the field of view. In order, to keep the telescope tracking the field of view selected, the instrument will need to a rotation system for compensating it [1]. The new WEAVE [2] two degrees field of view requires a new field de-rotator on the top-end of the telescope. The rotator system has been designed with a direct drive motor which eliminates the need for mechanical transmission elements such as gearboxes, speed reducers, and worm gear drives. This design is a huge advantage for the system performance and lifetime because it eliminates undesirable characteristics such as long-time drift, elasticity, and backlash. The hardware control system has been developed with a Rockwell servo-drive and controller. The rotator has to be controlled by the high-level software which is also responsible for the telescope control. This paper summarizes the model developed for simulating and the software which will be used to accept the rotator system. A performance study is also carried out to test the CIP (Common Industrial Protocol) for communications between the high-level software and the rotator hardware.

Paper Details

Date Published: 6 July 2018
PDF: 13 pages
Proc. SPIE 10700, Ground-based and Airborne Telescopes VII, 1070033 (6 July 2018); doi: 10.1117/12.2313238
Show Author Affiliations
Jose Miguel Delgado, Instituto de Astrofísica de Canarias (Spain)
Saúl Menéndez Mendoza, Univ. of La Laguna (Spain)
Jose Alonso Burgal, Instituto de Astrofísica de Canarias (Spain)
Jose Miguel Herreros, Instituto de Astrofísica de Canarias (Spain)
Sergio Picó, Isaac Newton Group of Telescopes (Spain)
Don Carlos Abrams, Isaac Newton Group of Telescopes (Spain)
Carlos Martin, Isaac Newton Group of Telescopes (Spain)
Diego Cano, Isaac Newton Group of Telescopes (Spain)
F. J. Gribbin, Isaac Newton Group of Telescopes (Spain)
Jure Skvarč, Isaac Newton Group of Telescopes (Spain)
Kevin Dee, Isaac Newton Group of Telescopes (Spain)
Emilie Lhome, Isaac Newton Group of Telescopes (Spain)
Gavin Dalton, STFC Rutherford Appleton Lab. (United Kingdom)
Univ. of Oxford (United Kingdom)
Kevin Middleton, STFC Rutherford Appleton Lab. (United Kingdom)
Scott Trager, Univ. of Groningen (Netherlands)
J. Alfonso L. Aguerri, Instituto de Astrofísica de Canarias (Spain)
Piercarlo Bonifacio, GEPI, Observatoire de Paris (France)
Antonella Vallenari, INAF - Osservatorio Astronomico di Padova (Italy)
Esperanza Carrasco, INAOE (Mexico)


Published in SPIE Proceedings Vol. 10700:
Ground-based and Airborne Telescopes VII
Heather K. Marshall; Jason Spyromilio; Roberto Gilmozzi, Editor(s)

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