Nasr, Karim M. ORCID: https://orcid.org/0000-0002-8604-6274, Hughes, Ben, Forbes, Alistair and Lewis, Andrew (2014) Determination of laser tracker angle encoder errors. In: EPJ Web of Conferences Volume 77, 2014 16th International Congress of Metrology. EDP Sciences, 00002. ISSN 2100-014X (doi:10.1051/epjconf/20147700002)

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Abstract

Errors in the angle encoders of a laser tracker may potentially produce large errors in long range coordinate measurements. To determine the azimuth angle encoder errors and verify their values stored in the tracker’s internal error map, several methodologies were evaluated, differing in complexity, measurement time and the need for specialised measuring equipment. These methodologies are: an artefact-based technique developed by NIST; a multi-target network technique developed by NPL; and the classical precision angular indexing table technique. It is shown that the three methodologies agree within their respective measurement uncertainties and that the NPL technique has the advantages of a short measurement time and no reliance on specialised measurement equipment or artefacts.

Item Type:	Conference Proceedings
Title of Proceedings:	EPJ Web of Conferences Volume 77, 2014 16th International Congress of Metrology
Uncontrolled Keywords:	laser tracker, large volume metrology, uncertainty, angle encoder errors
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > School of Engineering (ENG)
Last Modified:	01 Oct 2019 15:21
URI:	http://gala.gre.ac.uk/id/eprint/25319

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