Journal
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
Volume 32, Issue 2, Pages 106-113Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.precisioneng.2007.05.001
Keywords
positional error; laser interferometer; uncertainty budget; measurement uncertainty
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This paper presents an uncertainty analysis of a Positional Error Calibrator based on a laser interferometer system. This laser calibration system is capable of evaluating the positioning accuracy of a numerically controlled axis of machine tools and coordinate measuring machines (CMM) under dynamic conditions. In order to assess the measurement uncertainty of this calibrator, an analysis of the uncertainty components that make up the uncertainty budget of this calibrator has been carried out. These uncertainty components can be classified into three categories as follows: (1) uncertainties intrinsic to the laser system; (2) uncertainties due to environmental effects; (3) measuring uncertainties due to the installation. The procedure for evaluating the uncertainty of this calibrator follows GUM (Guide to the Expression of Uncertainty in Measurement). This uncertainty analysis was carried out when this calibrator was used to assess the positional errors of the X axis of a moving bridge type CMM. (C) 2007 Elsevier Inc. All rights reserved.
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