Author(s)

A.B. Forbes and G.N.Peggs

Abstract

In this paper we describe a large reference artefact for use in CMM verification. The artefact is of modular design, constructed in 1 m or 0.5 m tubular sections made from carbon- composite materials. Each section can carry a range of reference surfaces including reference spheres (tooling balls). We discuss the calibration of the artefact using a repositioning methodology and the use of the artefact in CMM verification. 1 INTRODUCTION A major step in establishing the traceability of measurements carried out by co- ordinate measuring machines (CMMs) involves the comparison of CMM measurements of an artefact with calibration information associated with the artefact. This approach is explicit in ISO 10360-2 [1] which gives a procedure for determining the length measuring c

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