Effect of Building Platform Position on the Surface Quality, Dimensional Accuracy, and Geometrical Precision of Direct Metal Laser Sintering (DMLS) Parts

Abstract

This paper presents the variations of surface roughness and geometrical precision of Direct Metal Laser Sintering (DMLS) parts depending on their positions on the building platform of EOS M290. A distinctive design was created to measure and compare the surface quality, dimensional accuracy, and geometrical precision. This design was built on various positions of the building platform using constant parameters. Surface roughness (Ra) measurements and imaging were carried out. Platform position was found to be an important parameter affecting the surface quality of horizontal and inclined surfaces as well as the dimensional accuracy of the fine geometric details.