Design for 3D Printing

Cody Wilson -Arkansas

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

Watertight

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

Non-contiguous faces

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.

Wall Thickness

Dyeing and Painting