CMM's Stylus Approach Direction Effect On Error Propagation

Noor Diana, Mohd Diah (2009) CMM's Stylus Approach Direction Effect On Error Propagation. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Coordinates Measuring Machines (CMM) are referred to as those machine that gives physical representations of a three dimensional rectilinear Cartesian coordinate system. As one of the most powerful metrological instruments, CMM are widely used in most manufacturing plants, large and small. There are many types of probe commercially available. Touch trigger probes are by far the most commonly used due to their simplicity. It is well known that most touch trigger probes suffer from lobing effects, for example pre-travel variation in different probing direction. These are largely systematic error and normally depend upon a number of factors including probe orientation, stylus length, diameter, measuring speed, trigger force and approach direction. The purpose of this project is to presenting about a CMM performance evaluation in a different of stylus approach direction. It is because, in different approach direction of touch trigger on the calibrated instrument, it will produce error propagation. At here, this study will investigate in what direction will give the large of propagation error.

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