Abstract
The self-driven articulated arm coordinate measuring machine (self-driven AACMM) is a new type of flexible coordinate measuring equipment. The integrated joint module is introduced to the AACMM joint for self-driven control and automatic measurement, resulting in the joint angle error of self-driven AACMM. In this study, an ideal measurement model of the self-driven AACMM have been established. The sources of angle error of joint module is analysed, and single and comprehensive models of the joint module’s angle error are established. Numerical simulation of the angle error model of the single joint module is conducted by MATLAB. An angle error calibration experiment of the joint module is carried out with the photoelectric autocollimator and the metal 36-sided prism. Results show that each joint module produces different torsional deformation due to load. The angle error of joint module 1, 6 are most and least affected by the load torque, the actual average errors of the two are 37.64 arcsec and −0.9632 arcsec, respectively. The simulated and calibrated single-joint module angle error trends are cyclical, and the calibrated angle error range is [−100.4 arcsec, 205.2 arcsec]. The harmonic error component in the harmonic reducer and the magnetic encoder is an important factor of the angle error of joint module. The eatablished angle error model of single joint module can be effiectively applied to comprehensive error compensation for high measurement accuracy of self-driven AACMM.
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Acknowledgments
This work was supported by the Key Research and Development Projects in Anhui Province of China (Grant No. 202004a07020046) and the National Natural Science Foundation of the PR China (Grant No.51775163). The authors would like to thank other members of research team for their contributions to this project.
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Hongtao Yang received his B.S. and M.S. degrees in Measurement and Control Technology and Instrument from Anhui University of Science and Technology in China in 1993 and 2001, respectively. He obtained his Ph.D. degree from Hefei University of Technology in 2007. He is now a Professor of the School of Mechanical Engineering at Anhui University of Science and Technology. His main research interests are precision testing technology, modern precision theory and application.
Mei Shen is a Ph.D. majored in Mechanical Engineering of Anhui University of Science and Technology. Her research interests include precision machinery and precision measurement.
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Shen, M., Yang, H., Cheng, J. et al. Joint module angle error analysis and modelling of self-driven articulated arm coordinate measuring machine. J Mech Sci Technol 36, 6329–6344 (2022). https://doi.org/10.1007/s12206-022-1144-0
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DOI: https://doi.org/10.1007/s12206-022-1144-0