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Open AccessArticle

A Novel Method for the Measurement of Geometric Errors in the Linear Motion of CNC Machine Tools

1
State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China
2
Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
3
Centre of Micro/Nano Manufacturing Technology (MNMT-Dublin), University College Dublin, Dublin 999015, Ireland
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Appl. Sci. 2019, 9(16), 3357; https://doi.org/10.3390/app9163357
Received: 31 July 2019 / Revised: 9 August 2019 / Accepted: 12 August 2019 / Published: 15 August 2019
(This article belongs to the Section Optics and Lasers)
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Abstract

In order to improve the accuracy of the linear motion of computer numerical control (CNC) machine tools, a novel method based on a new type of 1-D (1-dimensional) artifact is proposed to measure the geometric errors. Based on the properties of the displacement measurement of a revolutionary paraboloid and the angle measurement of plane mirrors, the 1-D artifact can be applied to identify position errors and angle errors. Meanwhile, the concrete 6 degrees-of-freedom error identification method is described in this paper in sufficient detail. Through measuring the 1-D artifact horizontally and vertically using the machine tool, the geometric errors can be obtained by calculating the deviation between the characteristic parameter of the 1-D artifact measured by the machine tool and that measured by a more precise method, for example, laser interferometry. Experiments were carried out on a coordinate measuring machine, and the validity and accuracy of the method were discussed by comparing the result with the identification error measured by a laser interferometer. View Full-Text
Keywords: CNC machine tools; linear motion; geometric errors; micro displacement measurement; 1-D artifact CNC machine tools; linear motion; geometric errors; micro displacement measurement; 1-D artifact
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Wei, X.; Su, Z.; Yang, X.; Lv, Z.; Yang, Z.; Zhang, H.; Li, X.; Fang, F. A Novel Method for the Measurement of Geometric Errors in the Linear Motion of CNC Machine Tools. Appl. Sci. 2019, 9, 3357.

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