Why a Gearless Extruder Works for 3 mm Filament

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While it is accepted dogma that one should always gear down a stepper motor to push 3 mm filamnet through an extruder - we think otherwise.

We start with principle calculations of filament strength. We know that it is possible to push 3 mm filaments strongly into the melt zone of an extruder, to push through the operative non-Newtonian fluid physics - of partially molten plastic being very viscous and thus hard to move. Read more - [1]