Servo Mismatch Estimation of Miniaturized Machine Tools Using Laser Tracker

레이저 트래커를 이용한 소형 공작기계의 서보 불일치 추정

Lee, Hoon Hee;Kweon, Sung Hwan;Son, Jin Gwan;Yang, Seung Han

  • Received : 2016.01.05
  • Accepted : 2016.05.09
  • Published : 2016.08.01


Servo mismatch, which affects positioning accuracy of multi-axis machine tools, is usually estimated via the circular test. However, due to mechanical restrictions in measuring instruments, the circular test using a double ball-bar is difficult to apply in miniaturized or super-large sized machine tools. Laser trackers are widely used to measure the form accuracy of parts and the positioning accuracy of driving systems. In this paper, a technique for the servo mismatch estimation of multi-axis machine tools is proposed via the circular test using a laser tracker. To verify the proposed technique, experiments using a double ball-bar and laser tracker are conducted in a 3-axis machine tool. The difference in the evaluation results is 0.05 msec. The servo mismatch for the miniaturized machine tool is also evaluated using the proposed technique.


Laser tracker;Miniaturized machine tool;Circular test;Servo mismatch


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Supported by : 한국연구재단