A Fiber Positioner Robot for the Gran Telescopio Canarias
Marco Azzaro, Santiago Becerril, Cristian Vilar, Xabier Arrillaga,, Justo Sanchez, Isaac Morales, Miguel Angel Carrera, Francisco Prada

TL;DR
This paper presents the design, development, and testing of a novel fiber positioner robot for the Gran Telescopio Canarias, aiming to improve the efficiency of fiber-fed spectrographs in astronomical observations.
Contribution
It introduces a scalable actuator array design for fiber positioning, validated through a real-scale prototype and comprehensive testing procedures.
Findings
Prototype successfully meets mechanical requirements
Design enables rapid, simultaneous fiber positioning
Validation confirms the concept's viability for large telescopes
Abstract
Fiber-fed spectrographs dedicated to observing massive portions of the sky are increasingly being more demanded within the astronomical community. For all the fiber-fed instruments, the primordial and common problem is the positioning of the fiber ends, which must match the position of the objects of a target field on the sky. Amongst the different approaches found in the state of the art, actuator arrays are one of the best. Indeed, an actuator array is able to position all the fiber heads simultaneously, thus making the reconfiguration time extremely short and the instrument efficiency high. The SIDE group (see http://side.iaa.es) at the Instituto de Astrof\'isica de Andaluc\'ia, together with the industrial company AVS and the University of Barcelona, has been developing an actuator suitable for a large and scalable array. A real-scale prototype has been built and tested in order to…
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