An approach of building a large scale 1m³ printing RepStrap kind of fabricator.
The goal is to built a large scale fabber which will actually print BIG things..
- the buildarea is 1m³ (big enough for printing a chair, a table, prosthetics, parts for humanoid robots, everything you need)
- scalable in size, lightweight and with plenty room for customization/optimization.
The new design incorporates aluminum-beams which are cheap and obtainable in hardware stores (and recyclable) and has only a few parts which you need to produce/fab yourself. This allows you to easily alter the length of the aluminum-beams and build a bigger or smaller machine while using the same mechanical parts. The parts you have to produce are all 2D, so you can cut them with a lasercutter, cnc, waterjet or manually.
The mechanism uses 4 12mm threaded rods (standard from the hardware-store), driven by timing-pulleys and a drive-belt, to move the xy mechanism up and down, which in my opinion will alow fast xy movements.
It is still a concept so one could optimize it for printing the parts with a RepRap. Also there are no tools or toolholder designs included, but there is a baseplate where you can fix the tools you want to use. What is also missing is end-stops and wiring, i plan to put that stuff manually with the first build and put it in the design afterwards.
It is fitted for 3 nema23 with 190Ncm, 76cm length, which should work with the RepRap gen3 electronics.