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<small>[[:Kategorie:RepRap|all RepRap pages]]</small> | <small>[[:Kategorie:RepRap|all RepRap pages]]</small> | ||
=== WTF? === | === WTF? === | ||
This project is about building a '''3D printer for rapid prototyping'''. In contrast to a milling machine the process is additive i.e. the workpiece is built-up layer by layer, usually from thermoplastic material. Different commercial devices exists - needless to say, they are pricey. The goal of a RepRap machine is the ability to print almost all parts it consists of, hence ''a self-'''rep'''licating '''rap'''id prototyper''. | This project is about building a '''3D printer for rapid prototyping'''. In contrast to a milling machine the process is additive i.e. the workpiece is built-up layer by layer, usually from thermoplastic material. Different commercial devices exists - needless to say, they are pricey. The goal of a RepRap machine is the ability to print almost all parts it consists of, hence ''a self-'''rep'''licating '''rap'''id prototyper''. | ||
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=== Some remarks === | === Some remarks === | ||
* we are using [http:// | * we are using [http://openscad.org/ OpenSCAD] to generate STL files where the units in the STL file are interpreted as mm. In principle we should be able to print any STL files without holes that don't have too much overhang. Even if it has overhangs you can still get good results if the overhang is like a bridge. the RepRap software doesn't care which tool you create the STL in. Exporting an STL is possible in almost any 3d program. Other things i've tried was [http://www.wings3d.com/ Wings 3d] and [http://www.blender.org/ Blender] (both open source). I did not get far with blender, but wings3d is really usable for simple non-exact stuff. | ||
** the most important thing to make it printable is that is has a flat base otherwise there is no way to attach it firmly to the base plate. | ** the most important thing to make it printable is that is has a flat base otherwise there is no way to attach it firmly to the base plate. | ||
** overhangs of more than 50 degrees might be a problem. | |||
* current setup: layer with 0.24mm. size of filament in X/Y plane about 0.5mm. Walls should be at least two layers (1mm). One layered walls are possible but fragile. | * current setup: layer with 0.24mm. size of filament in X/Y plane about 0.5mm. Walls should be at least two layers (1mm). One layered walls are possible but fragile. | ||
* Takes ages. Very rough estimate 10-20 min/cm³. But depends on how big the surface is since the inner parts will be sparsly infilled (mostly hollow). But if the surface is big there there might be no inner part and so it takes longer. | * Takes ages. Very rough estimate 10-20 min/cm³. But depends on how big the surface is since the inner parts will be sparsly infilled (mostly hollow). But if the surface is big there there might be no inner part and so it takes longer. | ||
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