Error measurement and assemble error correction of a 3D-step-gauge |
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Authors: | Mao Xinyong Li Bin Shi Hanmin Liu Hongqi Li Xi and Li Peigen |
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Affiliation: | (1) National CNC Control System Research Center, School of Mechanical Science and Engineering, Huazhong University of Science & Technology, Wuhan, 430074, China |
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Abstract: | A new artifact called 3D-step-gauge consisting of a pyramid array and a compound, is proposed to calculate geometrical errors
for machine tools. Only one point on each profile of the pyramid in the array is probed, and its center coordinate can be
calculated. Then, the intervals of the pyramids can be transfered a length standard to measure errors. Considering the differences
in the structural parameters and the location of the pyramids, a volumetric error measurement method of discrete points is
presented. Furthermore, the location errors between the calibration state and the measurement state are studied and their
influences on the accuracy of the position measurement are investigated on an actual machine tool. The 3D-step-gauge was tested
on an actual machine tool and the measurement result shows quick assembly, convenient measurement, and high accuracy. |
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Keywords: | CNC machine tools error measurement measurement instrumentation 3D-step-gauge parametrical calibration |
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