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A method of geometric error identification and compensation of CNC machine tools based on volumetric diagonal error measurements

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Abstract

Error compensation is an effective method to guarantee the machining accuracy of machine tools. This paper proposes a method for geometric error identification and compensation of CNC machine tools based on volumetric diagonal error measurements. A geometric error model for CNC machine tools was established. Thereafter, the error measurement principle of the laser tracker was established. Based on this characteristic, error identification equations used to describe the position-dependent geometric errors were derived based on polynomials. A regularisation method was then selected to identify geometric error parameters. The identified geometric errors could be substituted in the space compensation module for error compensation. This paper takes a horizontal three-axis machining centre as an example to illustrate the proposed method. Results of the experiment reveal that the error identification and compensation method is convenient and effective in reducing volumetric diagonal errors. Moreover, the final volumetric diagonal positioning error with compensation was controlled at approximately 20 μm.

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Funding

The authors gratefully acknowledge the supports of the National Key R&D Program of China (grant number 2018YFB1701201).

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Authors and Affiliations

  1. Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin, China

    Zixin Lin, Dawei Zhang, Weiguo Gao & Lina Wang

  2. School of Marine Science and Technology, Tianjin University, Tianjin, China

    Wenjie Tian

Authors
  1. Zixin Lin
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  2. Wenjie Tian
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  3. Dawei Zhang
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  4. Weiguo Gao
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  5. Lina Wang
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Contributions

Zixin Lin: conceptualization, methodology, investigation, writing. Wenjie Tian: resources, supervision. Dawei Zhang: data curation, original draft. Weiguo Gao: validation, investigation. Lina Wang: validation, investigation.

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Correspondence to Wenjie Tian.

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Lin, Z., Tian, W., Zhang, D. et al. A method of geometric error identification and compensation of CNC machine tools based on volumetric diagonal error measurements. Int J Adv Manuf Technol 124, 51–68 (2023). https://doi.org/10.1007/s00170-022-10484-w

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  • DOI: https://doi.org/10.1007/s00170-022-10484-w

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