Abstract
A novel kinematic model of spatial five-bar linkage PPSPS is presented to test the accuracy of the two-axis moving table by ball-bar for the first time in the paper. During motion measurement, the kinematic chain SPS of the ball-bar and the two prismatic pairs of the moving table constitute a five-bar linkage PPSPS. The mounting positions of the ball-bar and the directional offset between the two prismatic pairs correspond to the structure parameters of the mechanism, while the measured data of the ball-bar are regarded as the outputs of the mechanism. Hence, the mounting position errors of the ball-bar and the directional offset of the prismatic pairs are readily identified by kinematic synthesis of the PPSPS mechanism using the discrete data measured by the ball-bar, and then the errors of the moving table are obtained by the measured data minus the theoretical output of the mechanism. The model of spatial five-bar linkage PPSPS for ball-bar test of the machine table is independent of the mounting position errors and the assumption of planar motion.
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Acknowledgments
The authors want to acknowledge the support received from the national natural science foundation of China (Grant No. 51775079).
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Li, X., Wang, Z., Dong, H., Yu, S., Wang, D. (2019). A Novel Kinematic Model of Spatial Five-Bar Linkage PPSPS for Testing Accuracy of Two-Axis Moving Table with Ball-Bar. In: Gasparetto, A., Ceccarelli, M. (eds) Mechanism Design for Robotics. MEDER 2018. Mechanisms and Machine Science, vol 66. Springer, Cham. https://doi.org/10.1007/978-3-030-00365-4_11
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DOI: https://doi.org/10.1007/978-3-030-00365-4_11
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