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Proceedings Paper

Correlation of 3D volumetric positioning errors and temperature distributions: theory and measurement
Author(s): O. Svoboda; P. Bach; J. Yang; C. Wang
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Paper Abstract

In a real machine shop environment and under various spindle loads, the machine thermal expansion may cause large 3D volumetric positioning errors. With an intelligent controller, it is possible to compensate these errors provide that the relations between the 3D volumetric positioning errors and the temperature distribution were measured. A laser vector measurement technique developed by Optodyne was used for a quick measurement of 3D volumetric positioning errors of a CNC machining center under various spindle loads, machine movement and ambient conditions. Correlation calculations were used to determine the key temperatures and the various positioning errors. Preliminary results showed that large machine temperature changes caused somewhat small straightness error changes but large squareness error changes. Using the measured position errors, several error maps could be generated. Compensation tables at an actual thermal state can be interpolated to achieve higher accuracy at various thermal loadings.

Paper Details

Date Published: 30 October 2006
PDF: 10 pages
Proc. SPIE 6358, Sixth International Symposium on Instrumentation and Control Technology: Sensors, Automatic Measurement, Control, and Computer Simulation, 63583Q (30 October 2006); doi: 10.1117/12.718148
Show Author Affiliations
O. Svoboda, Czech Technical Univ. in Prague (Czech Republic)
P. Bach, Czech Technical Univ. in Prague (Czech Republic)
J. Yang, Shanghai Jiao Tong Univ. (China)
C. Wang, Optodyne, Inc. (United States)


Published in SPIE Proceedings Vol. 6358:
Sixth International Symposium on Instrumentation and Control Technology: Sensors, Automatic Measurement, Control, and Computer Simulation
Jiancheng Fang; Zhongyu Wang, Editor(s)

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