Anet A3S Vortex Ring Fan Duct

thingiverse

Design for the Anet A3S metal frame for a new fan duct. The ring dose not blow the air directly at the nozzle but in a swirling vortex around and below the nozzle. This helps to keep the nozzle form being cooled by the part cooling fan. This also bolts into place, so you may need longer screws to secure it in place, or cut off the mounting tab and glue it into the fan itself. I also had readjusted my nozzle to sit a bit higher to shorten the distance between the extruder and top of the heatbreak. Though right now I am running mine as a Bowden feed with a MicroSwiss mk8 all metal hotend. The duct tucks nicely up into the frame of the print carriage, but still leaves room for a small strip of LED lights to shine through. It also is centered on the nozzle unlike most other ducts I have seen. No, the outlet of the fan is not centered on the nozzle, so I took some time to make sure it was as centered as possible. March 30, 2018: I've reworked some of the internal cavity to allow for better airflow and reworked the entire design for easier printing. I got rid of the secondary model with the extra outlet since it was too small to allow any air to actually flow out of it. I've also added thermal images of the fan and hotend. the first shows with the fan off, the second with it on to show that the air dose not cool the hotend itself. Though there is always a chance that air may bounce back up at the hotend depending on the design of what is being printed.