A Six-Probe Scanning Method for Guide Rail Straightness Measurement

Jiao Jiao Yang; Xin Chen; Guo Qing Ding; Li Hua Lei; Yuan Li

doi:10.4028/www.scientific.net/AMM.217-219.2669

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 217-219A Six-Probe Scanning Method for Guide Rail...

A Six-Probe Scanning Method for Guide Rail Straightness Measurement

Abstract:

Straightness error is the main profile error of guide rail. This paper studies a scanning six-probe system for measuring straightness of two guide rails. The system does not use angle sensors and consists of two probe-units, each having three displacement sensors. The two probe-units are moved by a scanning stage to scan the surface of two guide rails, then they are rotated 180 and scan guide rails again after the first scanning. The zero-differences of two probe-units before and after probe-units being rotated, as well as the straightness of the guide rails, can be accurately evaluated from the outputs of the displacement sensors in two scanning process. The effectiveness of this method is confirmed by computer simulation and experimental results in the case of two probe-units having different zero-differences before and after probe-units being rotated.