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| A Laser Vector Technique
for the Measurement of Static Positioning Errors &
Compensation Chen-Chou Chung, Syh-Shiuh Yeh, and Jui-Fang Liang Industrial Technology Research Institute Hsinchu, Taiwan 300 R.O.C. Limit Chou, and Jiin-Tain Su AWEA MECHANTRONIC CO., LTD Hsinchu, Taiwan 300 R.O.C. And Charles Wang* Optodyne, inc 1180 mahalo place Compton, CA 90220 U.S.A |
| Abstract The competition in global manufacturing today requires higher accuracy and better quality machine tools. Just calibrate and compensate the 3 displacement errors (or pitch errors) are not enough. To determine the volumetric positioning accuracy, all 3 displacement errors, 6 straightness errors and 3 squareness errors have to be measured and compensated. Recently, Optodyne has developed a new laser vector measurement technique for the determination of volumetric positioning errors including 3 displacement errors, 6 straightness errors and 3 squareness errors, in a few hours instead of a few days. Using this laser vector measurement technique the volumetric positioning errors of an AWEA vertical machining center, model FV-1000 with Fanuc 18M controller has been measured. To check the effectiveness of various compensation schemes, the volumetric positioning accuracies were measured without any compensation, with pitch error compensation, with pitch error and straightness error compensation, and with volumetric compensation. The measured volumetric errors were 110 m m without compensation, 95 m m with pitch error compensation, 16 m m with pitch error and straightness error compensation, and 12.5 m m with volumetric compensation. The basic theory of operation, the hardware, the data collection and processing, and some test results will be discussed. |
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*To be presented by Dr. Charles Wang in the IDW 2002, Knoxville, TN, May 6-9, 2002 |
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