Metal 3D Printing
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Proprietary
- Desktop metal - [1]
- Robots + Mig Welders - [2]. Cost of MIG wire is $2/lb, so overall cost is reasonable. Imagine 3D metal printing for rebar forms combined with Clay Extrusion to make rebar reinforced Earthen Construction all with industrial robots.
Open Source
- MTU early MIG-welder based printer - [3]