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| Stepwise CoefficientsModifying Modeling of Thermal Errors of a CNC Machine Tool |
| (1. School of Mechanical Engineering, Yancheng Institute of Technology, Yancheng 224051, Jiangsu China; 2. School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200030, China) |
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Abstract Based on the analysis of insufficiencies and limitations of the linear regression analysis modeling method, a new modeling method, that is, stepwise coefficients-modifying modeling method (SCMM) whose basic theory and compensation strategies are evolved and elaborated on, was proposed. The modeling and compensation tests were carried out on a CNC turning center. The results show that the fitted errors are nearly close to zero at the sampled data based on that the model was derived (called original sampled data here) while a good conformity with the original sampled data is got at the nonoriginal sampled data, which proves the thermal error model can effectively improve the compensation accuracy.
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Received: 12 January 2011
Published: 30 November 2011
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