Introduction to Reprap - an open-source 3D printer

Reprap is an open-source 3D printer that turns CAD models of objects into physical objects. There are different technologies for 3D printing. The particular technology that Reprap uses is called "fused-deposition modelling" (FDM) or "fused-filament fabrication" (FFF). It is limited to the use of thermoplastic materials.

Some 3D printing technologies facilitate the fabrication of metal objects. These are usually far more expensive, however, and - as of April 2012 - there is no widely-used or widely-tested open-source design for these sort of machines.

Reprap's homepage can be found at

The attached image shows my own Reprap. It's a very basic design.