TY - GEN
T1 - Camera articulation prototype of the Giant Magellan Telescope Multi-object Astronomical and Cosmological Spectrograph (GMACS)
AU - Ji, Tae Geun
AU - Cook, Erika
AU - Pak, Soojong
AU - Kelly, Evan
AU - Bush, Leonardo
AU - Barba, Leonardo
AU - Mason, Jeffrey
AU - Lee, Hye In
AU - Depoy, Darren L.
AU - Marshall, Jennifer L.
AU - Butler, Nat
AU - Faes, Daniel M.
AU - Froning, Cynthia
AU - Gamaunt, Johnathan
AU - Jones, Damien
AU - Mauskopf, Philip
AU - Mendes De Oliveira, Claudia
AU - Papovich, Casey
AU - Prochaska, Travis
AU - Ribeiro, Rafael A.S.
AU - Schmidt, Luke M.
AU - Scowen, Paul
AU - Souza, Aline
AU - Taylor, Keith
AU - Braulio Neto, Antonio
AU - Pires, Priscila
N1 - Funding Information:
T.-G. Ji and S. Pak were supported by the Korea Astronomy and Space Science Institute under the R&D program (Project No. 2020-3-850-02) supervised by the Ministry of Science and ICT.
Publisher Copyright:
© 2020 SPIE.
PY - 2020
Y1 - 2020
N2 - We describe the camera articulation prototype (CAP) for the Giant Magellan Telescope Multi-object Astronomical and Cosmological Spectrograph (GMACS), which is a wide field, multi-object, moderate-resolution, optical spectrograph of the Giant Magellan Telescope (GMT). The GMACS will have the Camera and Grating Articulation System (CGAS) which has two independent cameras and grating modules. The grating angles and the camera angles can be changed to adjust the dispersed light bands on the detector. The electronics components of this system include motors with encoder, pneumatic brakes, and limit switches. We demonstrate how to control the camera angles using a prototype that is designed for the camera articulation controller as a miniature model of the GMACS. The prototype was built with commercially-available extruded aluminum struts and 3D-printed parts and includes two motors with encoders. The prototype was produced quickly and inexpensively, but replicates all functions of the camera articulation mechanism in GMACS. We have developed the control package for the prototype that will be one of the GMACS Device Control System (DCS). The software is designed by the Agile development process and SysML, and developed using Visual C++ on Windows OS. This software has five major control functions: power, homing, resolution mode changing, limit detection, and emergency process. The limit detection is implemented by setting up the limit angle range in the software, because the limit switches are not included in the prototype. We present the demonstration result and discuss the details of the communication route about data flow between high-end user software and hardware components.
AB - We describe the camera articulation prototype (CAP) for the Giant Magellan Telescope Multi-object Astronomical and Cosmological Spectrograph (GMACS), which is a wide field, multi-object, moderate-resolution, optical spectrograph of the Giant Magellan Telescope (GMT). The GMACS will have the Camera and Grating Articulation System (CGAS) which has two independent cameras and grating modules. The grating angles and the camera angles can be changed to adjust the dispersed light bands on the detector. The electronics components of this system include motors with encoder, pneumatic brakes, and limit switches. We demonstrate how to control the camera angles using a prototype that is designed for the camera articulation controller as a miniature model of the GMACS. The prototype was built with commercially-available extruded aluminum struts and 3D-printed parts and includes two motors with encoders. The prototype was produced quickly and inexpensively, but replicates all functions of the camera articulation mechanism in GMACS. We have developed the control package for the prototype that will be one of the GMACS Device Control System (DCS). The software is designed by the Agile development process and SysML, and developed using Visual C++ on Windows OS. This software has five major control functions: power, homing, resolution mode changing, limit detection, and emergency process. The limit detection is implemented by setting up the limit angle range in the software, because the limit switches are not included in the prototype. We present the demonstration result and discuss the details of the communication route about data flow between high-end user software and hardware components.
KW - Giant Magellan Telescope
KW - camera articulation
KW - multi-object spectrograph
KW - software development
UR - http://www.scopus.com/inward/record.url?scp=85099400249&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85099400249&partnerID=8YFLogxK
U2 - 10.1117/12.2561237
DO - 10.1117/12.2561237
M3 - Conference contribution
AN - SCOPUS:85099400249
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Software and Cyberinfrastructure for Astronomy VI
A2 - Guzman, Juan C.
A2 - Ibsen, Jorge
PB - SPIE
T2 - Software and Cyberinfrastructure for Astronomy VI 2020
Y2 - 14 December 2020 through 18 December 2020
ER -