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- W2370346095 abstract "In order to solve the problem of the poor positioning accuracy of rotary axis affected by the installation error of circular grating-the key measuring element of fully-closed-loop NC rotary axis,based on the operating principle of angle measurement with circular grating,the influence law of moire fringe affected by the run-out of positioning end face of grating during the installation was analyzed thoroughly,a cooresponding mathematic relationship was deduced and a mathematical model between rotary axis positioning error and run-out error of positioning end face of grating was established as well. Numerical simulation shows that once the installation error of positioning end face of circular grating occurs,the output light intensity varation of moire fringe goes through a cycle,which approximats a sine curve. Adjusting the former run-out error value of end face of circular grating from 70 μm to 16 μm,the positioning error of rotary axis was measured with high precision single frequency laser interferometer,the error curves of measuring results were both sine curves and the positioning accuracy was incresed 3 times over before. So correctness of the theoretical analysis was verified. At the same time,the experimental results indicate that reducing the axial run-out error of positioning end face of circular grating can improve the positioning accuracy of rotary axis effectively." @default.
- W2370346095 created "2016-06-24" @default.
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- W2370346095 date "2013-01-01" @default.
- W2370346095 modified "2023-09-23" @default.
- W2370346095 title "Study on positioning accuracy of closed loop NC rotary axis" @default.
- W2370346095 hasPublicationYear "2013" @default.
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