I seem to remember someone wanting something like this…
Makerbot used to make something like this, but I don’t think it ever worked that well. For the price, you could get seven Ender3s…
This is actually more interesting than I thought at first, it can do prints which are much longer than the bed. That’s cool. It has problems with some “normal” objects due to the angled extruder, but it can print some other models that would be impossible with normal printers. Neat.
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I was just listening about how someone put two of them facing each other so they could swordfight.
holy crap thats amazing.
Infinite rails, infinite panel lengths! I recall someone put a belt on an Ender 3 and used it to set up an automatic production line.
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I believe you have just reinvented the extrusion process 
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