CNC machines for processing of natural stone by applying Taguchi Experimental Design Methods investigation of surface quality

In this study, the natural stone CNC machine, which leads to minimum surface roughness with the Taguchi experimental design method, provides an approach to determine milling process parameters (cutting speed, feed rate and cutting depth). Milling operations in 14 natural stones, using a orthogonal array L9, Taguchi experiment design method was performed. S/N based on a "smaller, better" approach to determine optimal levels of processing parameters was calculated separately for each natural stone. Analysis of variance (ANOVA), Correlation and regression analysis application, petrographic and physical-mechanical properties of processing parameters and natural stones were used to examine the effects of surface roughness. The results of this study show that cutting depth has the most important effect. When petrographical properties of the natural stones are evaluated, the average grain size of the rocks plays an important role especially in surface purge.