Building Matt Robert’s Compact Geared Extruder

I wanted an extruder to use for my experimental hot ends so I took advantage of the long weekend and had a go at Matt Robert’s Compact Geared Extruder.

I like the small, modular design, and particularly like how he’s approached the transfer of torque in the main gear.  This requires three set (grub) screws to go the radius of the gear, and I didn’t have any lying around.  A few minutes with some M3 bolts and a hacksaw though yielded sufficiently long and stable screws.

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