Circular Cooling Fan (Dup i3)

thingiverse

This design is a circular hotend fan for your Duplicator i3 printer. It works with the original 30mm cooling fan. The v2.7 update is currently being tested. Printing tests are in progress, and it seems to be working well compared to the stock fan duct. The test prints used layers between 0.2-0.3 mm, a print speed of 50mm/s, and an infill percentage of 25%, all with PLA at 195°C. After two hours, there were no signs of melting, which is promising given the relatively low temperature. However, when trying to print with the heated bed enabled, the fan duct started to melt, causing damage to the printed part by scraping against it. This behavior suggests caution: do not attempt to use this design if you have a heated bed setup.