subtractive vs additive processes printing motivation motivation motivation complexity access waste constraints failure resolution time cost materials materials polymers: PLA, PETG, PMMA, ABS, HIPS, TPU, PVA, ... fillers: wood, metal, ... storage: hygroscopic ventilation design rules supports overhang FCStd jpg stl clearance FCStd jpg stl unsupported angle FCStd jpg stl overhang FCStd jpg stl bridging FCStd jpg stl wall thickness FCStd jpg stl dimensions FCStd jpg stl anisotropy FCStd jpg stl surface finish FCStd jpg stl infill FCStd jpg stl tapers, corner z offset, leveling, measurement adhesion, warping, rafts, brims post-processing plating processes stereolithography laser DLP fused-deposition molding extruder extrusion contour crafting DED, WAAM ink-jet binder PolyJet cut sheets selective laser sintering two photon digital machines RepRap self-replication Ultimaker Z-Unlimited Prusa parts Sainsmart Sindoh Mosaic Palette Formlabs SLA parts Print the Legend Chase Me mass customization SLS Stratasys J55 color MTM InMachines Hangprinter Precious Plastic Filastruder materials Proto-pasta MatterHackers NinjaTek MachineableWax The Virtual Foundry food safety food safety food safety service bureaus print farms Shapeways Ponoko Additively file formats STL ASCII solid object_name facet normal n1 n2 n3 outer loop vertex v11 v12 v13 vertex v21 v22 v23 vertex v31 v32 v33 endloop endfacet ... endsolid object_name binary 80 byte ASCII header 32-bit integer number of facets 50 byte facet records 32-bit IEEE floats normal vertices 1,2,3 2 byte attribute right hand rule normal (optional) (lack of) units file size PLY AMF 3MF FAV OBJ, 3ds,DXFVRML, X3D glTF Alembic FREP adaptively-sampled distance fields voxels .vol, .gif, image stack marching cubes voxel print G-codes non-planar paths software meshing MeshLab netfabb meshmixer Geomagic slicing ReplicatorG Skeinforge Slic3r PrusaSlicer Cura IceSL Kiri:Moto t43 printing Printrun OctoPrint Repetier sharing Sketchfab Thingiverse modelviewer scanning point cloud, triangulation, watertight, texture lighting, background, surface tomography Radon transform micro-CT scanned probe confocal serial sections opacity digitizer stereo RealSense Photogrammetry AliceVision Meshroom CUDA EC2 remote image ReCap PhotoScan VisualSFM SCANN3D 3DSOM Qlone OpenMVG COLMAP OpenScan speckle OpenKinect ReconstructMe Skanect laser FabScan structured light laser pico-projector Gray code POP2 LIDAR Seeed TI Intel Matterport Scaniverse light stage scanning SLAM assignment group assignment: - test the design rules for your 3D printer(s) individual assignment: - design and 3D print an object (small, few cm3, limited by printer time) that could not be made subtractively - 3D scan an object (and optionally print it)
