Comments by "mpetersen6" (@mpetersen6) on "Why 3D Printing Batteries Matters" video.

@keenheat3335 The machine tool manufacturer Deckel Maho has a 5 axis combined 3D printer machining center. Only the 3D printer is a CNC controlled MIG welder.
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You missed one 3D printing technology that has largely fallen by the wayside. 3D printing using layers of paper that are bonded together and cut one layer at a time. This was fairly widespread 20 to 25 years ago in industry as it could be used to rapidly produce prototypes for cast products without going thru the requirement of making patterns to produce one of or short run castings. Such a printer could also be used to produce items using other sheet material such as thin plywood. The method can have a high waste to product rate. Maybe 4 years ago there was a company in Ireland that introduced a desktop printer that combined an inkjet with a 3D printer. And people have been using additive manufacturing in home offices for decades now. Only it is on sheet at a time using ink or toner.
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Subtractive manufacturing (stamping, machining) really doesn't produce waste. The processes produce high value scrap materials with very high recovery rates. Plus the different materials are segregated to a large degree. Scrap steel from stamping operations typically will get run thru a compactor to reduce volume resulting denser scrap that gets sold on to steel plants. Steel is still one of the largest recycled items worldwide
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