Modeling and analysis of nonlinear guideway for double-ball bar (DBB) measurement and diagnosis |
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Authors: | J.-M. Lai J.-S. Liao W.-H. Chieng |
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Affiliation: | †Department of Mechanical Engineering, National Chino-Tung University, 1001 Ta-Hsueh Road, Hsinchu, 30049, Taiwan, Republic of China |
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Abstract: | The purpose of this paper is to study nonlinear geometric errors in multi-axis machine tools. A general mathematical model for guideway systems that can be applied to high-precision machine tools such as CNC lathes is introduced. Using this model, most nonlinear error sources in the guideway systems can be diagnosed by measuring the contouring error using a double-ball bar (DBB). Diagnostic software has been developed to identify system parameters based on the least-squares estimation method. Inputting two or three contouring errors pattern data into this software enables parameters to be identified quickly, based on the nonlinear model. |
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