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Rapid calibration method for measuring linear axis optical paths of computer numerical control machine tools with a laser interferometer

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Abstract

The optical path calibration process using a laser interferometer is time-consuming and tedious, requiring repeated adjustment and experienced operators, leading to a significant reduction in measuring efficiency. A novel optical path calibration process of the linear axis of a three-axis machine tool using a Renishaw XL-80 laser interferometer is proposed in this paper. The homogeneous coordinate transformation error model of the measured axis is established. Using the established error model, only the initial distance from the laser transmitter to the beam splitter and the initial distance from the beam splitter to the linear mirror are required to accurately calibrate the laser beam. The relationship between the fixed distance from the center of the light target to the quarter point on the edge of the light target and the movement distance of the measured axis are obtained. Eight deviations of the optical path affected by the laser transmitter, the beam splitter and the linear mirror are solved. Calibrations based on the deviations can be achieved by adjusting the positions and orientations of the laser interferometer components, leading to a rapid and accurate calibration method for measuring the optical paths.

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Funding

The study received financial support from the National Natural Science Foundation of China (Nos. 51905377 and 51705362) and Natural Science Foundation of Tianjin (Nos. 16JCYBJC41300 and 18JCQNJC75600).

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Authors and Affiliations

  1. Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology, Tiangong University, Tianjin, 300387, China

    Xiaogeng Jiang, Tianfang Meng, Liang Wang & Chang Liu

  2. School of Mechanical Engineering, Tiangong University, Tianjin, 300387, China

    Xiaogeng Jiang, Tianfang Meng, Liang Wang & Chang Liu

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  1. Xiaogeng Jiang
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  2. Tianfang Meng
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  3. Liang Wang
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  4. Chang Liu
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Correspondence to Chang Liu.

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Jiang, X., Meng, T., Wang, L. et al. Rapid calibration method for measuring linear axis optical paths of computer numerical control machine tools with a laser interferometer. Int J Adv Manuf Technol 110, 3347–3364 (2020). https://doi.org/10.1007/s00170-020-05976-6

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  • DOI: https://doi.org/10.1007/s00170-020-05976-6

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