I built a 36" x 18" x 18" by welding a Prusa style aluminum frame up from scrap aluminum plate, and running the bed on 8mm rods and bearings. Dual Volcano 1.2mm hotend, it prints nearly as fast as that. It has about a dozen 110V heater pods mounted to the aluminum/glass bed. I’ve printed some big things on that since I built it about 8 years ago.
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In case anyone is curious, the printer in the picture is 1100x1100x820 mm and costs $50k USD.
https://builder3dprinters.com/us/product/builder-extreme-3000-pro/
I built a 36" x 18" x 18" by welding a Prusa style aluminum frame up from scrap aluminum plate, and running the bed on 8mm rods and bearings. Dual Volcano 1.2mm hotend, it prints nearly as fast as that. It has about a dozen 110V heater pods mounted to the aluminum/glass bed. I’ve printed some big things on that since I built it about 8 years ago.
I might be $500 into it.