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Traceability analysis and coupling compensation for guideway-induced errors in large CNC gantry guideway grinder

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Abstract

Guideway-induced errors are the main factors affecting the machining accuracy in computer numerical control (CNC) machine tools. In this paper, the guideway-induced errors of a large CNC gantry guideway grinder are analyzed and measured to realize the traceability analysis and coupling compensation. To establish the error model, an automatic error modeling application is developed based on the least-square fitting of orthogonal polynomial method and visual basic. The comprehensive error model of the grinder is established using the homogenous transformation matrix to realize the error distribution analysis in a three-dimensional workspace. The error separation method is used to achieve the traceability analysis of the guideway-induced errors. To realize the coupling compensation for guideway-induced errors, an external mechanical origin offset (EMOO) and Ethernet-based error compensation method are proposed in this research. Experimental results showed that the maximum error was compensated by 91.2 % compared with no compensation.

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Authors and Affiliations

  1. School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai, China

    Kaiguo Fan & Haolin Li

  2. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China

    Jianguo Yang

Authors
  1. Kaiguo Fan
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  2. Haolin Li
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  3. Jianguo Yang
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Correspondence to Kaiguo Fan.

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Fan, K., Li, H. & Yang, J. Traceability analysis and coupling compensation for guideway-induced errors in large CNC gantry guideway grinder. Int J Adv Manuf Technol 80, 907–919 (2015). https://doi.org/10.1007/s00170-015-7070-x

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  • DOI: https://doi.org/10.1007/s00170-015-7070-x

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