Digital Level measurement method is based on the level of instrument readings as a tool for measuring a range of measuring round rail precision. Measurements are mainly tangential and radial measurements, single-rail distortion measurement method and the central hole and the slide surface perpendicularity measurements.
1. Cut to rob Method
        Circular rail flatness measurement known as the tangent to the circumference measurement. The principle of this measurement method and measured by the level of linear guide rail straightness very similar, the only difference will be bent into a linear guide ring connected end to end in. Measurement with the level of linear guide machine when you install the tilt to eliminate the impact. Same. Measurement data in the circular guide will also decadent level of discounting and the ideal horizontal rails installed between the degree of influence do not coincide