Abstract
In 3D surface roughness measurement, the size of the evaluation area is not standardized. In this paper a method for minimizing the evaluated area is detailed. The aim of this study is reducing the time spent on measurements in industrial applications. Hard turning and grinding experiments were carried out for hardened surfaces to demonstrate the method based on Design of Experiment by varying cutting data. Basic statistical calculations were applied to analyze the relationship between the area size and the parameter values and normality analysis was applied to extend the results. The main finding is that minimum evaluation areas can be designated for many parameters, but this designation is not yet clear for all of the analyzed roughness parameters and technological data combinations.
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