THE INFLUENCE OF REVERSE GEOMETRIC MODELING TO THE DIMENSIONS AND SHAPE OF THE 3D MODEL

The aim of the study is to investigate the effect of point reduction on the dimensions of a part produced by two different additive technologies, Stereolithography (SLA) and Fused Deposition Modelling (FDM). Also, the effect of polygonization methods on the number of points and file size. For the purpose of the experiment, a part was fabricated which was made up of geometric elements, which served to investigate the influence of the reverse geometric modelling on parameter variation. Subsequently, the model was made into two samples by additive manufacturing FDM and SLA on Stratasys F370 (FDM) and Form 3 (SLA). From the fabricated samples, 3D data was collected on a Metrotom industrial CT 1500, cloud of points was obtained and polygonised in various ways in CAQ software GOM Inspect and CARE software VG Studio MAX. The evaluation as well as the process reverse modelling was performed in Autodesk Powershape software. The results show that different polygonization methods affect the number of polygonal mesh points and the volume of data. It was also found that the reduction of the points by which the polygonal network is formed leads to variations in the dimensions of the geometric features. Another important factor is the method of additive manufacturing of the component, where we have shown point reduction has a different effect for a component manufactured by SLA and a component manufactured by FDM.