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Development of a traceable performance verification route for optical micro-CMMs.

Hiersemenzel, F*; Singh, J*; Petzing, J N*; Claverley, J D; Leach, R K; Helmli, F* (2013) Development of a traceable performance verification route for optical micro-CMMs. In: Laser Metrology and Machine Performance X (LAMDAMAP 2013), 20-21 March 2013, Chichley, UK.

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There is growing industrial interest in improved measurements of small-scale objects, with demands for co-ordinate geometry data with higher resolution and accuracy, and for instruments to have better data acquisition capabilities. Whilst traditionally contacting stylus-based co-ordinate measuring machines (CMMs) have been used for 3D measurement of small-scale objects, there is now significant interest in optical instruments. The introduction of optical techniques has already caused innovative advances in metrology. However, in a similar manner to contact CMMs, demonstrating confidence in the measurement data requires a robust calibration route, traceable to the definition of the metre.
The focus variation (FV) technique has the potential to be used for co-ordinate metrology on the micro- to millimetre scale, however, before such a machine is brought to the market, a suitable verification procedure should exist. The ISO 10360 suite of specification standards for CMM verification is designed for tactile instruments and some optical instruments, but does not include the FV technique. This paper presents progress in the development of a verification artefact that specifically addresses the needs of a CMM based on FV. The potential for using spheres as part of a performance verification artefact is investigated.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: Engineering Measurements
Engineering Measurements > Dimensional
Last Modified: 02 Feb 2018 13:14
URI: http://eprintspublications.npl.co.uk/id/eprint/5747

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