This study explored the effect of processing parameters on surface roughness as a result of
aesthetic designs processed on walnut, chestnut, and beech wood edge-glued panels
(EGPs) by CNC (computer numerical control) router. To accomplish this, the average
roughness value (Ra) on an engraved surface in a Ying-Yang design treated on the material
was measured. Using analysis of variance (ANOVA), the feed rate, spindle speed, step-over,
and axial depth of cut factors; surface roughness factors; and the interactions between these …