Filament Dust Filter/Cleaner
thingiverse
A compact, screw together filament cleaner with slots in the side so you can remove it without removing the filament first. Designed for 3mm but 1.75mm filament works just fine too. Instructions This is made in Solidworks, Recommend printing in PLA, with a hotend nozzle fan, no supports, 0.2mm layer height. Print the 2 parts, tidy up with a sharp blade, cut a small piece of sponge to fit inside. Cut a slot in the sponge, slot sponge over filament, then printed parts, then screw together.
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