| Summary: | 碩士 === 國立臺灣海洋大學 === 資訊工程學系 === 106 === We introduce an optimization framework to reduce the supporting structures required by 3D printers based on fused deposition modeling (FDM). A 3D printer needs to connect overhangs to the bottom parts of an object or the ground to print it. As the support material needs to be printed first and removed later, reducing its volume can lead to some quantity of material being saved. We present a novel voxel-based approach that decreases the support material while providing sufficient support. Using our approach, the input 3D model is first oriented into a position with a minimum projected volume that requires support via grid-based principal component analysis (PCA). Then, the points in this area that require support are detected. For these points, the supporting structure is progressively built while the overall voxels of the support structure are reduced. The resulting structure has a tree-like shape that effectively supports overhangs. We tested our algorithm on the Cura®, and we compared our solution to the embedded software solution in this printer and to Autodesk® Meshmixer™ software. Our solution reduced the amount of material used by an average of 36.8% (ranging from 15.3% to 56.3%).
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