You might not think to use the word “rigid” to describe most 3D-printer filaments, but most plastic filaments are actually pretty stiff over a short length, stiff enough to be pushed into an extruder.
BIQU (aka Bigtree Tech) is now offering the direct-drive extruder it designed for the Bigtree BX printer as a separate part. Dubbed ‘H2 (Hydrogen) Direct Extruder’, it seems to be ‘inspired by’ E3D’s ...
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