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Improving the Accuracy of Angle Measurement in Machine Calibration

1986; Elsevier BV; Volume: 35; Issue: 1 Linguagem: Inglês

10.1016/s0007-8506(07)61908-8

1726-0604

G. Zhang, R.J. Hocken,

Advanced machining processes and optimization

Angle measurements are of great importance in machine calibration. Due to large Abbe offsets and long travel at" machine tools and measuring machines the angular motion errors and out-of-squareness of the guideways often contributes much more to the total error budget than the linear positioning; errors and straightness errors. Errors inherent in commonly used methods of measuring angular motion errors and squareness errors are analyzed in this paper. New methods, such as the reversal method for angular motion error measurement and the displacement method for angular and squareness error measurement. are proposed. These methods give an accuracy of about 0.02 arcseconds in pitch and yaw measurements and 0.1 arcsecond in squareness measurements. These errors are much smaller than the errors of other commonly used laser interferometric methods.