Corta, R*; Cox, M G; Cross, N R; Dotson, J R; Flack, D R; Forbes, A B; O'Donnell, J*; Peggs, G N; Prieto, E* (1998) A large reference artefact for CMM verification. NPL Report. CLM 6

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Abstract

This report describes the design, construction and calibration of a large reference artefact suitable for use as a length artefact in the verification of co-ordinate measuring machines (CMMs). The artefact is of modular design, constructed in 1 m and 0.5 m tubular sections made from carbon-composite materials. Each section can carry a range of reference surfaces including reference spheres (tooling balls). The artefact has been calibrated by three metrology laboratories using a repositioning methodology. Equipment for supporting the artefact during the verification of a CMM has also been designed and constructed. The artefact and positioning equipment have been successfully tested in the verification of two large CMMs according to the principles of ISO 10360-2. The design philosophy and calibration methodology are flexible and can be easily adapted, providing a practical approach to large CMM verification.

Item Type:	Report/Guide (NPL Report)
NPL Report No.:	CLM 6
Subjects:	Engineering Measurements Engineering Measurements > Dimensional
Last Modified:	07 Sep 2018 14:24
URI:	http://eprintspublications.npl.co.uk/id/eprint/970

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