Author(s)

Sir David McMurtry

Abstract

This paper reviews the technical development of 3D tactile sensors and coordinate measuring machines (CMMs) over the years and examines the changes in their ability to perform the inspection task in terms of accuracy, uncertainty and speed. Introduction Drawing standards such as ANSI Y14.5 and BS8888 define exactly the allowable geometric size, position and shape of part features. However, none are inspection standards and give no guidance whatsoever to an inspector on how the part should be inspected or how the measured value is defined. In fact, there is no internationally agreed standard for dimensional inspection. It is usually up to the inspector to interpret the drawing and determine what procedure is needed to verify the part, given the inspection tools at hdher disposal. The same measuring instrument can give vastly different results depending on how it is used. In the case of th

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