Universal Gearless Extruder
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Intro
A Flexible Gearless Extruder is one of the distinguishing features of OSE's D3D Universal 3D printer, now introduced as the standard extruder for D3D Pro, Pro 2, and Pro 3.
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OSE History
We have experimented with various extruder designs since 2016 - see 3D Printer Genealogy. We started with the common MK8 Extruder in 2016. The MK8 is a simple, gearless design, but it works only with 1.75 mm filament. Further, it is a design that one buys commonly off-the-shelf, and no good open source versions were documented at the time.