I just wanted to share a toolhead I've been working on for little while: It's a bit of a mish-mash of things I had on hand, but it's a direct drive extruder using the gears from a Bondtech BMG, a Nema 14 stepper motor, a cheap Ender-3 style heat-sink and an E3D heatblock and nozzle. I guess it's a lot less relevant now with the Hemera out, but I still wanted to share it. STLs: https://www.thingiverse.com/thing:4018910 Onshape source: https://cad.onshape.com/documents/c...870d233f3a57f6809d/e/664857bb189496ec65c3a787
Really nice! I think you have something there - that's lightweight. What nema14 did you find that's adequate?
Thanks! It's a 28 mm from here (14HS2812) The holding torque is reported similar to the Nema 17 pancake motors. I don't know what that means in dynamic applications, but so far it seems to be just about enough.
Some updates on the performance: - As an extruder for flexibles which was the main design goal it is an absolute champ. Not quite PLA-settings-and-go, but I have an old roll of generic TPU that I have never been able to use in either BMG+V6 or Titan Aero which it is extruding without problems. - For multi material prints it did fail with a nozzle clog however. I attribute this to the heat creep in the inadequate hotend heatsink. I'll try a longer motor or perhaps consider how to fit a V6 or buy a Mosquito.
