Measurement and analysis of typical motion error traces from a circular test

Abstract

The circular test provides a rapid and efficient way of measuring the contouring accuracy of a machine tool. To get the actual point coordinate in the work plane, an improved measurement instrument - a new ball bar test system - is presented in this paper to identify both the radial error and the rotation angle error when the machine is manipulated to move in circular traces. Based on the measured circular error, a combination of Fourier components is chosen to represent the systematic form error that fluctuates in the radial direction. The typical motion errors represented by the corresponding Fourier components can thus be identified. The values for machine compensation can be calculated and adjusted until the desired results are achieved.

References

1. Omari M In: Proceedings of the Second International Advanced Technology for Dieand Mold Manufacturing ConferenceColumbus 1997
2. Ramesh R Mannnan M A Poo A N Error compensation in machine tools-a review. Part I: geometric,cutting-force induced and fixture-dependent errorsInternational Journal of Machine Tools & Manufacture 2000 4012351256. doi:10.1016/S0890‐6955(00)00009‐2
3. Kangkyu L Soichi I Atsushi M et al.A Servo Parameter Tuning Method for High-Speed NCMachine Tools Based on Contouring Error Measurement, Laser Metrologyand Machine Performance VISouthamptonWIT Press 2002
4. An American National Standard, ASME B5.54-1992by the American Society of Mechanical Engineers 1992
5. Kakino Y et al.An Accuracy Inspection of NC Machine Tools by Double Ball Bar MethodCarl-Hanser, Munchen 1993
6. International Standard, ISO 230-4, Test Code forMachine Tools 1996
7. Wang C P Griffin R Omari M et al.Evaluation of machine tool contouring accuracy athigh feed ratesIn: Proc. of ASPE 15th AnnualMeetingScottsdale 2000
8. Bryan J B Asimple method for testing measuring machines and machine tools, part1: principles and applicationPrecisionEngineering 1982 4(2)6169. doi:10.1016/0141‐6359(82)90018‐6
9. Bryan J B Asimple method for testing measuring machines and machine tools, part2: constructionPrecision Engineering 1982 4(3)125138. doi:10.1016/0141‐6359(82)90075‐7
10. Liu H L Shi H M Li B et al.A new method and instrument for measuring circularmotion error of NC machine toolsInternationalJournal of Machine Tools & Manufacture 2005 4513471351. doi:10.1016/j.ijmachtools.2005.01.012
11. Heidenhain GmbH, User' Manual of ACCOM 2003