Metrological feasibilities of CMM touch trigger probes. Part I: 3D theoretical model of probe pretravel |
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| Authors: | A Wo
niak M Dobosz |
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| Affiliation: | Institute of Metrology and Measuring Systems, Warsaw University of Technology, 
w.A. Boboli 8 Street, 02-525, Warsaw, Poland |
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| Abstract: | New 3D model of the inaccuracy of a touch trigger probe used to collect coordinates of a measured object by coordinate measuring machine (CMM) is proposed. The analysis is performed both for one and two stage types of probes. The influence of a stylus length and diameter, a spring force and direction of a contact point approach are taken into consideration. The effects of frictional interaction between the stylus ball and a measured surface are also taken into consideration. The theoretical analysis of a tough trigger probe hysteresis is presented. Finally a computer simulation of mathematical modeling in the XYZ space is shown. |
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| Keywords: | Coordinate measuring machines Dimensional metrology Measurement Touch trigger probes Probing accuracy One-stage and two stage probes |
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