EXPERIMENTAL ANALYSIS OF UNCERTAINTY OF SQUARENESS CALIBRATION ON A CO-ORDINATE MEASURING MACHINE

Bojan Acko

Abstract

Co-ordinate measuring machines (CMMs) are often used for calibrating different kinds of squares. A procedure for calibrating squares on the CMM Zeiss UMC 850 was developed in our laboratory to cover primarily industrial needs. The uncertainty analysis that was performed for this procedure is introduced in the article. The most important uncertainty contributions were evaluated experimentally. Many experiments were also performed in order to find the most appropriate calibration position in the CMMs measurement space. About 2000 measurement points were taken in order to get reliable results for uncertainty components. The analysis results expressed as the best measurement capability were checked by participation in the Euromet 570 project, which has not been finished yet. The current value of the best measurement capability is 0,9 arc sec.

Keywords

squareness, uncertainty, calibration

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PWC-2003-TC8-019.pdf

DOI

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IMEKO TC

TC8 - Traceability in Metrology

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