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A Multi-Axis Contour Error Controller for High-Speed/High-Precision Machining of Free form Curves  

이명훈 (경북대학교 대학원 기계공학과)
최정희 (경북대학교 대학원 기계공학과)
이영문 (경북대학교 기계공학부)
양승한 (경북대학교 기계공학부)
Publication Information
Journal of the Korean Society for Precision Engineering / v.21, no.4, 2004 , pp. 64-71 More about this Journal
Abstract
The growing need for higher precision and productivity in manufacturing industry has lead to an increased interest in computer numerical control (CNC) systems. It is well known fact that the cross-coupling controller (CCC) is an effective method for contouring applications. In this paper, a multi-axis contour error controller (CEC) based on a contour error vector using parametric curve interpolator is introduced. The contour error vector is a vector from the actual tool position to the nearest point on the desired path. The contour error vector is the closest error model to the contour error. The simulation results show that the CEC is more accurate than the conventional CCC for a biaxial motion system. In addition, the experimental results on 3-axis motion system show that the CEC is simply applied to 3-axis motions and contouring accuracy is significantly improved.
Keywords
Contour Error; Cross-Coupling Controller; Multi-Axis Contour Error Controller; Free Form Curve; Curve Interpolator;
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