Abstract
ELMER is a visible imager spectrograph currently scheduled to be in operation at the GTC on Day One. This paper covers engineering aspects of the instrument and summarizes five poster contributions presented at this conference. ELMER is an instrument managed directly by the GTC Project Office, which has developed the preliminary design and large part of the detailed design. The detailed design, manufacturing, and testing of the structure and mechanisms is being undertaken by the join venture MEDIA-SPASA.
