Development of a measuring method for motion accuracy of NC machine tools using links and rotary encoders |
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| Authors: | Hiroaki Iwai Kimiyuki Mitsui |
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| Affiliation: | 1. School of Integrated Design Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan;2. Department of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan;1. School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China;2. State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China;1. School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China;2. School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China;1. Centre of Advanced Manufacturing and Materials Processing, Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;2. Department of Mechanical Engineering, Faculty of Engineering, Assiut University, Assiut 71516, Egypt;3. Department of Micro-Engineering, Graduate School of Engineering, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8317, Japan;1. State Key Laboratory of Robotics and System, Harbin Institute of Technology (HIT), Harbin 150001, China;2. Shenzhen Graduate School, Harbin Institute of Technology (HIT), Shenzhen 518055, China |
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| Abstract: | An instrument capable of measuring arbitrary NC tool paths in a three-dimensional space has been developed. This paper describes the structure of the newly developed device and an estimation method for determining the 11 error parameters associated with the link length errors and the inclination of the link axes. The estimated error parameters were applied to tool-path trajectories that were calculated from rotary encoder output angles.The apparatus was employed in several measuring experiments, including measurements of square and circular paths for a vertical machining center. The results from these experiments support the validity of this measurement apparatus and the error parameters estimation method. |
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