D300VS Parts Fan Ducts and Mount

thingiverse

Directed parts fan ducts and mount for the stock Ultibots D300VS Micro Extruder and E3D V6 hotend. Internal geometry of the parts duct contains air guides to spread airflow evenly across the slot. As-tested, produces smooth airflow from just above the tip of the nozzle, down to approximately 2mm below, and converges from 10mm in front and behind the print nozzle, angled inward. Note: I do not use the thumbknobs on the extruder tensioning bolts, so I do not know if the mount design will cause issues with the stock plastic knobs (I use an allen key chucked into an electric screwdriver, for speed and ease). No bed clearance issues yet detected, but will modify as-necessary to fix bugs. Bug Fixed: Fan duct relief near the mount needed to be increased - could interface with mount, causing crooked install. This did not happen 100% of the time, so seems to be an as-printed issue. Increased cutout. Also increased fin surface area on first channel in right duct to improve air capture on forward vent - it was a bit weak, and adjusted the mount points to drop the fans 0.5mm lower, to direct less air across the nozzle itself, and improve airflow around the extrusion. Mount Mk2 uploaded w/updated pic. FreeCAD exports the left duct with a minor triangle issue, but it does not affect printability or function - as far as I can tell, it has zero effect on anything whatsoever. Since FreeCAD is a bit buggy, I can't find a way to export the left duct file without the reported error (error only reported in KISSlicer - Slic3r-PE doesn't see any problems). UPDATE: Currently reworking ducts and mount position to improve pressure and angle. This text will change once Mk.3 files are uploaded.