aluminium 3d printer / CNC

The goal is to build a frame model for a 3d printer using aluminium profiles and accessories using the library profil3030.scad from http://www.thingiverse.com/thing:15026

Currently there are four demo frames:
* a 3D printer like with bed.
* a CNC with rods.
* a CNC with pinion and racks.
* a triangular frame.

All the frames are parametrics.

Update:
2012-02-05 changed the triangular frame (frame4) to be parametric like the rest.