Ender 3 S1 40mm Noctua Part Cooling Duct

cults3d

This is a quick and dirty fan duct that allows a 40mm Noctua fan to effectively cool extruded filament. It is not the prettiest thing but I managed to get better performance than the stock part fan using 100% fan speed and a resistor to lower the voltage. Its adjustable in both X and Y so you can aim the duct to find the sweet spot. As an added benefit the model can be printed without support structure in as little as 2 hours. Pictured is a Fan Duct printed using a prior version of itself and 2 calibration cubes : Left is from stock fan and right is from new fan. There are slight improvements on the bottom of the split in the Y and X. I'm planning a V2 to reduce the footprint of the duct as well as another Noctua cooling solution to cool the heatsink ( its very tricky/impossible with an axial flow fan) A note to anyone designing 40mm Noctua cooling ducts for any and all printers : Make sure to not under size the outlet and avoid bends as much as possible. The smaller the outlet the more effective the boundary layer of air is at increasing static pressure requirement and it ends up shooting right back out the way it came. Required Hardware : 40mm Noctua Fan Resistors or 24v to 12v convertor 2 M3x8mm bolts 2 M3x6mm bolts 2 M3x3 threaded inserts 2 M3x4 threaded inserts If you do not have a soldering iron for the inserts you can heat your printer's nozzle to 10 degrees lower than the printing temp of the material and use it as a die to press them in.