Water bottle holder for my recumbent bicycle's oval shaped frame. • Replacement for the plastic table clamp of an old Luxo lamp • Replacement plastic foot for a camera tripod • Extension for my mouse to make it large enough for my hand • Z shaped key for an antique Chinese brass lock
Material extrusion • Material jetting • Binder jetting • Sheet lamination printers • Vat photopolymerization • Powder bed fusion • Selective Laser Sintering (SLS) • Selective heat sintering (SHS) • Direct Metal Laser Sintering (DMLS) • Directed energy deposition
File sizes • 50 to 64 MB, and a polygon count limit of 500,000 polygons • Polygon sizes • Small enough to make smooth surfaces • Not too small, makes work for the printer, minimum detail size printer can handle • Modeling Precision • In 3D design packages, you can have exact fit. 3D printers may not print exactly what you have designed.
Acrylonitrile Butadiene Styrene (ABS) • Polylactic acid (PLA) • Aliphatic polyamide (nylon) • Polyethylene terephthalate (PET) • LAYWOO-D3 • Photopolymers • Metal • Food • Cells
Manifold • A manifold vertex is one that is connected to another vertex by an edge • A manifold edge is one that has exactly two polygons associated with it
A vertex without an edge • An edge without a polygon • An edge from a polygon to a single vertex • An edge between vertices of two different polygons, but not associated with any polygon • Non-manifold edges surrounding a polygon (the polygon may be unneeded) • Two vertices that are very, very close together and have separate edges when they should be in the same location and share edges, so they leave a tiny hole in the surface • A missing polygon causing a hole in the surface
Degenerate geometry: With faces that have no area and edges that have no length. • Distorted geometry: It has faces that are not flat. • Improper thickness: It has walls that are too thin.. • Too sharp: It has edges that are too sharp, and will not print correctly, or the object may break during or after printing because it is too thin and fragile. • Too much overhang: It has polygons that do not have Supports.