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Re: CNC Router vs 3D Printer
Speaking as someone who has used a CNC router table to do MIG welding development... it's not a very good idea. The arc root can jump around, the material is laid down in a non-uniform profile, and there isn't much of a practical way to make 'filler' to support cantilevered features. Weld beads simply aren't consistent enough to get a decent part or hit any meaningful tolerance.
Robotic welding is used quite a bit in industry, in very but "not 3D welder printing."
As other's mentioned, printing in metal means SLS or another comparable process using powdered metal. Though this area is ripe for innovation...
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Theory is a nice place, I'd like to go there one day, I hear everything works there.
Maturity is knowing you were an idiot, common sense is trying to not be an idiot, wisdom is knowing that you will still be an idiot.
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