Abstract
A new accurate two-probe time domain method is putforward to measure the straight-going component motion error inmachine tools. The characteristics of non-periodic andnon-closing in the straightness profile error are liable to bringabout higher-order harmonic component distortion in the measurementresults. However, this distortion can be avoided by the new accurate two-probe time domain method through the symmetry continuation algorithm, uniformity and least squaresmethod. The harmonicsuppression is analysed in detail through modern controltheory. Both the straight-going component motion error in machinetools and the profile error in a workpiece that is manufacturedon this machine can be measured at the same time. All of thisinformation is available to diagnose the origin of faults in machinetools. The analysis result is proved to be correct through experiment.
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