This Ender 3 5015 fan system is straight to the point and very effective. Don't let it's tiny size fool you. This is a very effective part cooling duct. It is still a work in progress however the design as it is right now works perfectly. I have been using this fan exclusively over both the Hero Me and the Petsfang/Bullseye fan systems for about 3 months now. I will be uploading a short video I recorded to YouTube that shows the accuracy of the fan ducts in action, but for now just look at the screen grab pictures I added to this things upload.
The other fan systems like the Hero me and Petsfang are good fan systems. However for me they just too bulky for what they are designed to do, and that is cool down the print your working on effectively. This fan system places a very tight grouping of air that is directly below the print nozzle. This will improve print quality on certain materials, and increase your bridging distance. The notched slot in the below the 5015 ensures the airflow blows balanced in between both ducts evenly. The slots correct any back pressure that would otherwise leak out around the seat of the fan, and redistribute into the duct system.
The 5015 fan is just placed into the opening and held in place by the tight tolerance of the print itself, and held stable by the two stabilizers that will clip into the hole on top of the fans. Therefore no hardware is necessary to hold the fan into place. The print itself utilizes the two stock fan screws to hold itself onto the ender 3's stock hotend fan shroud. This fan duct utilizes the stock screws and the stock hot end shroud on the Ender 3. So no major upgrades are necessary besides the swap form the stock fan to the 5015. I will be adding a link to a 5015 fan, but for now just find a 24v one on amazon.
The model should be printed out of a higher temperature resistant material such as PETG or ABS. I chose to print it out of PETG and it has held up for the entire 3 months. The two small ducts are too close to the hotend to use material such as PLA, and they will eventually melt sooner when hot filament gets pushed into it. The PETG manages to keep the higher temperatures without damage happening before the runaway filament can cause any harm. Though those types of encounters are few and far between with a fully calibrated printer.
For the print quality a .4mm nozzle with .2mm draft quality will give you a very nice solid print. There is no need for supports or complicated print layouts for you to get a functional print made. The overall print time is relatively short since the size of the model is not very large. Maybe 1 hour total print time depending on the quality of the print. Just drop it into your slicing software, set you desired preferences, and print. No need to rotate the model in any special orientation.
As I stated before this duct system is a work in progress, and I am currently expanding this design to include a dual 5015 fan system and its own custom cooling fan shroud. The design will utilize both BLtouch and EZABL auto bed leveling sensors as well. I do have a design completed but the fan shroud needs improving to fit properly on the ender 3 hot end mount. I will update this text with revision 2 when I get the time to complete that design.
So I hope you enjoy this print as much as I have. My print quality has greatly improved since the moment I put this on my printer. I had felt I should release what I had finished with everyone else so that others that wanted the same simple design like I did could begin to utilize it. You don't always need a complicated print to get the results you desire. If there is any questions or comments please let me know below.