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Modeling and Identification for Rotary Geometric Errors of Five-Axis Machine Tools With R-Test Measurement

[+] Author Affiliations
Yung-Yuan Hsu

Chung Hua University, Hsinchu, Taiwan

Chih-Hsiang Chang

Precision Machinery Research Center, Taichung, Taiwan

You-Tern Tsai

De-Lin Institute of Technology, Taipei, Taiwan

Paper No. DETC2012-70182, pp. 567-575; 9 pages
  • ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 3: 38th Design Automation Conference, Parts A and B
  • Chicago, Illinois, USA, August 12–15, 2012
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-4502-8
  • Copyright © 2012 by ASME


The main purpose of this study is to use an R-test measurement device to estimate the geometric location error of the axis of rotation of five-axis machine tools. The error model of CNC machine tool describes the relationship between the individual error source and its effects on the overall position errors. This study based ISO230 to construct a geometric error model used to measure errors in the five-axis machine tools for the R-test measurement device. This model was then used to reduce the five-axis geometric error model based solely on the location error of the axis of rotation. Moreover, based on the simplified model and the overall position errors measured by the R-test with path K4, the location errors of rotary axes and ball position errors can be estimated very accurately with the least square estimation method. Finally, paths K1 and K2 were used as testing paths. The results of the test showed that the model built in this study is accurate and is effective in estimating errors.

Copyright © 2012 by ASME



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