The Development Of Sensors For CMMs
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
Keywords
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