Ender 3/CR-10 Direct Drive Bullseye Duct Clone

thingiverse

This is my (bad) clone of the great Bullseye fan duct for the Ender 3/CR-10, for use with direct drive extruders which place the extruder stepper directly above the hotend parallel with the Y axis. If you've tried to fit a Bullseye duct to a direct drive setup like this and found that your part cooling fan interferes with the stepper motor, this is a possible solution for you. This design uses the stock part cooling fan and the Bullseye mount that you can find here: https://www.thingiverse.com/thing:2759439 For use with direct drive setups similar to the one found here: https://www.amazon.com/Printer-Extruder-Flexible-Filament-Creality/dp/B0824ZQ3D1/ref=sr_1_3?dchild=1&keywords=ender+3+direct+drive&qid=1591907666&sr=8-3 Print using the settings found on the original Bullseye - orient fan duct outlets to the bottom of the build plate, use supports, from build plate only (you don't want supports inside the duct that you can't clear after the print is completed). Install using the height guidelines included with the original Bullseye. This is a first attempt at cloning a fan duct. I am very happy with the performance of the original Bullseye but when moving to a direct drive like the one I chose, the original doesn't fit. If you don't have this particular direct drive setup I recommend the original Bullseye. Mine is crude by comparison and I haven't done any airflow analysis to eliminate turbulence and provide an efficient cooling system like the designer of the original.