Effect of Printing Speed and Layer Height on Geometrical Accuracy of FDM-Printed Resolution Holes of PETG Artifacts †

Abstract

Poly ethylene terephthalate glycol (PETG)-filament gives excellent layer adhesion, thus it is widely used in fused deposition modeling (FDM). To achieve process repeatability, process parameters and product geometrical accuracy should be correlated. However, the studies of geometrical accuracy are limited. In this study, PETG-holes are FDM-printed, according to ISO ASTM 52902-2021 standard. The holes have diameters of 4 mm, 3 mm, 2 mm, 1 mm and 0.5 mm and are built with different printing speeds (20 mm/s, 50 mm/s and 80 mm/s) and layer heights (0.1 mm, 0.2 mm, 0.3 mm). The hole-diameter measurements are obtained by a microscope and computer vision. The results are then analyzed statistically and commented.