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I've been very interested in 3D printing/plotting/CNC. I wonder why the router has to be mounted on the head. That seems like a lot of weight/inertia to move. The router could be mounted on the base and a flex shaft used to do the actual carving. Any thoughts?
I built a RepRap Mendel tri color about 7 years ago and would like to convert to arduino as the support for the RepRap has gone away. Can I just use the arduino to replace the control circuits with appropriate shields?