The design of the sampling parameters for CMM of free-form surfaces

In order to improve the inspection accuracy of free-form surface by CMM, this paper adopted different sampling parameters research influence measurement surface. Through combination area uniform block random and Latin hypercube sampling, minimum grid ball diameter were taken as parameters. Firstly, analysed theoretically Secondly, carrying out experiments verified analytical results. Then, two groups on normal deviation could be acquired analysing experimental data. Finally, obtain result The results showed that measuring become smaller, profile error larger when number points same, more it can reflect actual contour surface, which proves is higher.