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  • Build Your Own 3d Printer Filament Factory (Filament Extruder)

    No reason why a real feed screw couldn't be made to fit inside your design, just needs to have same L/D and drive end to match the auger bit. I admit I took the easy way out with the kit, but at only about 2x cost of the pure DIY route. It was certainly an interesting project, and for me became a challenge using my professional knowledge to see what it could do as-is, and then with various hacks. Not to be too discouraging, but those seeing this design and thinking "I'll never have to buy a roll of filament again" (or, especially, "I can chop up my scrap prints and make new filament") need to understand its fundamental limitations.There's another way, probably cheaper than a CNC-machined feed screw, to make a screw (still from a drill bit) & barrel (still from a...

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    No reason why a real feed screw couldn't be made to fit inside your design, just needs to have same L/D and drive end to match the auger bit. I admit I took the easy way out with the kit, but at only about 2x cost of the pure DIY route. It was certainly an interesting project, and for me became a challenge using my professional knowledge to see what it could do as-is, and then with various hacks. Not to be too discouraging, but those seeing this design and thinking "I'll never have to buy a roll of filament again" (or, especially, "I can chop up my scrap prints and make new filament") need to understand its fundamental limitations.There's another way, probably cheaper than a CNC-machined feed screw, to make a screw (still from a drill bit) & barrel (still from a standard pipe) that can generate compression that I'm looking into. Requires machine shop work, but simple lathing and wire EDM (not as exotic as you might imagine). Will keep you posted.

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