Typhoon Fan Duct (Ender 3)

thingiverse

I designed this fan duct to be a simple to use, modify and install improvement on the stock Ender 3 fan duct, with optional compatibility for the stock BLtouch bracket. Whilst the design isn't perfect it has notably good performance and an improvement on the stock alternative, with correct tolerances all parts should friction fit and only stock bolts are required for this modification. When installing the main part of the fan duct (part 1) ensure that the heatsink cooling fan wire is ran through the main duct, then being fed into the small hook at the top, this keeps the cable tidy and out of the way without it getting too close to the hotend (also ensure to orient the fan so that the cable is at the top) also ensure to remove the wire from underneath the plastic hook that typically keeps it parallel to the fan, this avoids placing too much stress on one point of the cable. The cooling fan on this design has a slot in the back for the wire, many fan designs (stock and aftermarket) have a small hook that keeps the cable parallel, the wire will need to be moved from underneath this hook to allow for the 90 degree motion. Part 2 has a location pin that should make fitting it easier, however this may need some light sanding to provide a good fit, there is also holes either side of the socket for said pin, this allows for easier filament welding or addition of an adhesive if desired. ensure to print the parts as seen in the screenshots, this prevents support material being generated in areas where it will be impossible to remove, such as within the part cooling duct. (Part 1 is placed at a 15 degree angle). It may take some fiddling but when printed with the reasonable tolerances all parts should fit onto the stock hot end assembly, ensure to only add part 2 once part 1 has been secured. Only stock bolts should be required for assembly and there are two different versions dependant on if you require the duct to work with the stock BLtouch bracket or not. the hot end wire shroud can be anchored to the hot end assembly using the post located at the back, the hole should be the correct diameter for wire, filament or small zip ties. hot end wires should easily tuck under the tab to keep the nice and tidy.