Micro Swiss Direct Drive fan duct with BLTouch

thingiverse

Hi everybody, Here is my first contribution to the platform! It is a fan duct that I designed for my Micro-Swiss Direct Drive extruder using Fusion 360. It is inspired from Staffert's great work for CR10S printers that you can find here: https://www.thingiverse.com/thing:5117607 (kudos to him and all the creators before)! I needed something for the smaller fans that I am using and wanted to remove the duct behind the inline fan since the air was bouncing on and off the surfaces and not reaching the hotend well enough. I installed this on a customized Longer LK4 Pro (sort of an Ender 3 clone), hence it should fit any Ender 3 version that has been modified with a Micro-Swiss Direct Drive extruder, and probably other printers as well. I used standard 40x40mm inline and blower fans for this design (see pictures). In addition to the STL file, I added a STEP file if you want to remix the design with your CAD software, plus the full Fusion 360 file so that you can modify/remove the front text ("Cooling beast") if you'd like (look for the sketch called "Front text"). Forgive the number of steps that I used in the Fusion 360 file, I was designing and modeling at the same time. Regarding the BLTouch probe, I tried to keep it as close as possible to the hotend to minimize the offset. Here are the offset parameters: X-37.42 Y-12.5mm. To print the part, I used ABS, and I used a raft for proper adhesion to the bed, and no supports. You should flip the 3D model on your slicer to have the surfaces that will be in contact with the aluminium Micro-Swiss Direct Drive extruder facing the bed (see screenshot). You will also find the Hardware part list below. Enjoy! :)