What is the method to check the straightness of rail?
The measurement accuracy of the latter is up to 0.4 microns /1000 mm. Straightness measurement is mainly to measure the straightness error of cylinder and cone, the guideway of machine tools and other machines, and the straightness error of the workpiece's linear guide surface.
The straightness error can be measured by means of flat crystal, laser interferometer and straightness measuring attachment, and the measurement accuracy is very high.
The measurement of rail straightness is one of the important parts of length measurement technology. The commonly used methods are straight ruler method, collimation method, gravity method and straight line method.
