Filament tip sharpener
thingiverse
This sharpener allows you to sharpen the tip of the filament to simplify its insertion into the extruder. The problem with inserting filament into my Biqu H2 extruder occurred after switching to PTFE tubing with an internal diameter of 3 mm. It was not always possible to cut off the filament with side cutters so that it did not rest against anything when loading. The blade is taken from a pencil sharpener Brauberg 222484. I believe the dimensions of such a blade are standard, that there will be no problems with getting such a blade. However, I attached a STEP model so that you can adjust the model to suit your needs. Use a filament sharpener in the same way as a simple sharpener - insert the filament into the hole of the sharpener until it stops and turn it clockwise.
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