on 2012-04-04 15:48
Contraptor is a DIY open source construction set for experimental personal fabrication, desktop manufacturing, prototyping and bootstrapping. Various сartesian robots can be assembled from Contraptor and used as a prototyping platform for projects such as XY plotter, mini CNC machine, 3D printer etc.
Contraptor uses several developments of the Reprap project - specifically, Stepper Motor Driver
boards v1.x and Arduino GCode Interpreter.
The Contraptor site gives detailed instructions on how to make each Contraptor part using widely available raw materials and simple hand tools to drill the standardized holes.
The main project site is here: http://www.contraptor.org
See also: http://reprap.org/wiki/Contraptor
The contraptor project is inch based. However, a European Contraptor enthousiast has converted the Contraptor grid (inch based) to a cm based grid for his creation and applied the OS grid in doing so. The conversion was baptized Contrapteur (French for Contraptor:)
More info on this conversion at http://www.contraptor.org/forum/t-273404/contraptor-openstructures