Direct drive E3D Titan extruder with part cooling fan conversion

thingiverse

Yet another direct drive conversion for Ender 3. I'm running the E3D V6 hotend paired with a Titan extruder clone. Cobalt_prime's solution really caught my eye (https://www.thingiverse.com/thing:3784906), and it's easy to see why - sturdy, compact, and utilizing the whole mount plate with all four screws. The center of gravity is in line with the rail, ensuring minimal wobble since there are no distant masses at play. However, I did notice that it lacked a part cooling fan mount. I decided to take Cobalt_prime's design and make some tweaks to accommodate the stock hotend fan for cooling printed parts. For the hotend itself, I'm using the stock fan with its original mount, which came with the V6 hotend. It was designed specifically to work with this hotend and does its job remarkably well. There's plenty of room for hotend maintenance on this design. V2 saw the addition of a cable holder at the top, allowing cables to be zip-tied in place and secured by the lifted fan duct - the previous version had knocked some supports loose. I got tired of the small 30mm fan squealing so I swapped it out for a 40x40x20mm fan with an impressive 18cfm airflow. It's quiet and powerful. The part cooling was relocated to the other side, where I used a 40x40x10 stock HE cooling fan. It's still fairly quiet while providing enough airflow to cool printed parts. The fan is easily removable for hotend maintenance. Both fans are now connected with small connectors. I'm using a 22mm motor with a heat sink on hand! Redrilling holes was required for the stock fan installation. Print this design with ABS, ASA, or PETG - PLA may struggle to maintain structural stiffness.