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The means of open source production rely on a small set of multipurpose tools. The noteworthy feature is that these don’t take up a lot of space and are not particularly expensive. In particular, just the Multimachine, torch table, and electronics fabrication can produce the great majority of the products of the GVCS: turbine, CEB press, tractor, solar concentrators, power inverter, welder. Indeed, these machines can replicate themselves. Add computer control to the multimachine, torch table, and electronic circuit router – and you have Digital Fabrication. This is computer controlled fabrication – where you can download a design from the internet and produce it in your garage workshop.
The 3 machines, including CNC control – are $3k for their open source version, and about 10 times that for commercial counterparts.
Other important pieces of technology are laser cutter – for cutting in many media – including stainless steel – with extreme accuracy. Metal casting yields all kinds of cast shapes. Plastic extrusion could yield advanced glazing – for greenhouses.