An improved accuracy-measuring method in manufacturing the lead screw of grating ruling engine |
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| Affiliation: | 1. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Dongnanhu Road, 3888#, 130033, Changchun, PR China;2. University of Chinese Academy of Sciences, Yuquan Road, 19#A, 100049, Beijing, PR China;3. The Civil Aviation of China, Jinbei Road, 2898#, 300300, Tianjin, PR China;1. School of information and communication engineering. North University of China, Taiyuan, Shanxi 030051, China;2. Department of Mathematics, Application Science Institute, Taiyuan University of Science and Technology, Taiyuan, Shanxi 030024, China;3. School of Electronics and Information Engineering, Anhui University, Hefei 230039, China;1. School of Physics Optoelectronic Engineering, Xidian University, Xi’an, Shaanxi 710071, China;2. Collaborative Innovation Center of Information Sensing and Understanding at Xidian University;1. Department of Industrial and Enterprise Systems Engineering, University of Illinois at Urbana-Champaign, 104 S. Mathews Avenue, Urbana, IL 61801, United States;2. Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 205 N. Mathews Avenue, Urbana, IL 61801, United States;1. Tomsk Polytechnic University, Institute of Physics and Technology, Lenin Avenue 30, Tomsk 634050, Russia;2. KEK: High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan;3. SOKENDAI: The Graduate University for Advanced Studies, 1-1, Oho, Tsukuba, Ibaraki 305-0801, Japan;1. Department of Chemistry and Biochemistry, University of Denver, Denver, CO 80208, United States;2. Department of Pharmaceutical Sciences and Center for Biomedical Engineering and Technology, University of Maryland School of Medicine, Baltimore, MD 21201, United States;3. Center for Biomedical Engineering and Technology, and Department of Physiology, University of Maryland, Baltimore, MD 21201, United States;4. School of Engineering and Computer Science, University of Denver, Denver, CO 80208, United States |
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| Abstract: | A measuring method was studied to further improve the manufacturing accuracy of the lead screw. Firstly, factors that can axially displace the screw shaft were analyzed and a relationship between factors and axial displacement was given. The axial displacement of the screw shaft was measured using a laser interferometer, and results show that the variation amplitude of the screw-shaft axial displacement was about 80 nm while the variation period was consistent with the rotation period of the screw shaft. Next, two methods of measuring the manufacturing accuracy of the lead screw were considered: a traditional method that measures the absolute position of the nut and an improved method that measures the displacement between the nut and screw shaft. A No. 4 screw shaft was manufactured under the guidance of results obtained using the improved measuring method. Experimental measurements were then made; results show that the pitch displacement errors obtained using the traditional and improved measuring methods were 0.6 and 0.4 μm, respectively, indicating that the improved measuring method is more exact. Finally, an echelle grating ruled by a grating ruling engine that used the No. 4 screw shaft as a macro-positioning element was introduced. Its excellent parameters indirectly show that the improved measuring method has better accuracy. |
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| Keywords: | Lead screw Grating ruling engine Axial displacement Error analysis Non-contact measurement Laser interferometer |
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