Linear motion positioning accuracy is generally carried out under no-load conditions on the CNC lathe and worktable. According to the standard and the regulations of the International Organization for Standardization (ISO standard), the inspection of CNC lathes should be based on laser measurement. In the absence of a laser interferometer, it is also possible for general users to use a standard scale with an optical reading microscope for comparative measurement. However, the accuracy of the measuring instrument must be 1 to 2 levels higher than the accuracy of the measurement.
In order to reflect all the errors in the multiple positioning of CNC lathes, the ISO standard stipulates that each positioning point calculates the average value and dispersion according to the five measurements, and the dispersion belt constitutes the positioning point dispersion belt.
