Libro-Struder 3mm SCAD
thingiverse
Don't print it yet! The friction's too high; I'm tweaking this right now. This is a remix of the LibroStruder, but done in OpenSCAD, so it can be easily modified. I've reworked it for 3mm filament and used Greg's Wade Reload gears for NEMA to drive bolt gearing. You'll find them here for convenience. It couples from the drive bolt to the drive gear with two grub-screw modded M8 nuts. Partially threaded M3 bolts replace rivets, while 3mm/4mm brass tube bushes take their place. A mounting system's still needed.
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