High-resolution error separation technique for in-situ straightness measurement of machine tools and workpieces

摘要: A new Optimum Error Separation Technique (OEST) method is described for in-situ measurement of straightness a workpiece without an accurate instrument datum, i.e. precise guideway. The goal to alleviate the deficiencies traditional sequential-two-point (STP) and sequential-three-point (STRP). These state-of-the-art techniques must use sampling interval equal sensor spacing which has be larger than diameter sensors. Such large renders STP STRP useless short workpieces. established by extending multi-probe Discrete Fourier Transform (DFT) based roundness method. aperiodic nature measurements, makes DFT inappropriate, remedied numerical search scheme corrects those data points affected this limitation. results computer simulations experiments show that very good one in ultra-precision diamond turning lathe.