This is a complete direct drive print head assembly designed for the BLV mgn cube by Ben Levi. It takes inspiration from Ben's original Twin Blower but aims to make a few improvements.
My initial goal was to shorten the filament path from the extrusion gears to the nozzle but the problem is that if you want the extruder stepper motor on top of the rail (to reduce the moment force) then the original design pretty much has the extruder as close as it can be since the stepper motor cannot be lowered any further. Thus I created a completely new extruder design that flips the extruder gears below the motor gear as opposed to being position above it as in the original BMG. This brings the distance between extrusion gears and nozzle opening from ~118 mm down to ~79 mm. Whether this matters or not is up for discussion but anecdotally, I was at least able (or rather, forced) to lower my pressure advance from 0.09 to 0.06 for PETG.
Features:
What you need:
Use whatever print settings you feel is warranted. Also, print with supports according to your own judgement but here are a few guidelines:
I suggest you check out the online CAD viewer as a reference for how to assemble: https://a360.co/3cWstBm
I included some photos for reference of cable management.
For Z probe offsets, use X36.47 Y-4
Finally, I hope you enjoy it, give me feedback and remix it with the included STEP files.
Category: 3D Printer ExtrudersThe author marked this model as their own original creation. Imported from Thingiverse.