Scorpio's Backpack - remix of Scorpio fan duct to allow using 40x40mm axial fans (for Smartrapcore)

thingiverse

The Scorpio's Pack! 8< - - - - - - - - - - - - - - - - 18 Feb 2018 - - - - - START UPDATE I've nearly completed a complete overhaul of this project. It will branch out to an inspired version called the "Alien Blower", so... STAY TUNED! More is coming! 8< - - - - - - - - - - - - - - - - 06 Feb 2018 - - - - - START UPDATE I just figured out that the hollow for the hex nut must be a slot, so I have updated it with the V3! Please use only one screw per slot to attach the fan duct. If you use more, you won't be able to adjust the height of the blower to the extruder nozzle height! 8< - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - END UPDATE 8< - - - - - - - - - - - - - - - - 05 Feb 2018 - - - - - START UPDATE After only a few days of publishing this remix, I made two major updates: 1. I drew a hollow that allows the use of a hex nut on the lower back of the carriage head to block the linear bearings. 2. I enlarged the back side of the two fixture slots to 6mm to allow the use of allen screws to secure the fan duct to the carriage head. 8< - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - END UPDATE Mmmh.... Grami_fr did an excellent job designing his compact and useful Scorpio Fan Duct for the E3D V6 hotend! You can get it here: https://www.thingiverse.com/thing:1235390 So... Hurry! Go print it now! 8< - - - - - - - - - - - - - - - - cut here (Joking mode on) Oh no! Look! None of radial fans are available in the lab... Time to get your backpack and go buy a brand new one! But... Did you say backpack? Ahhhh! Great! I don't have to leave for now! I figured out the solution! I will put a backpack on the Scorpio! 8< - - - - - - - - - - - - - - - - cut here (Joking mode off) This was the true story that pushed me to create this design! Jokes apart, I remixed Grami_fr's work with a new duct extension that allows fitting common 40x40mm axial fans. I also tilted the Scorpio's base 0.3° backward, allowing it to lean correctly on the printing bed. As usual for my designs, I added a .STL file with thin (0.2mm) walls supporting the overhanged part of the 40x40mm fan duct and the curved part of the Scorpio's duct base itself, which can be easily scraped off. But... If you already have printed the original Scorpio duct before realizing that no radial blowers are available, you can find an additional .STL file to print the 40x40mm fan holder only, ready to be acetone glued to an ABS printed fan duct or superglued to a PLA printed one (although, if the hotend is not protected by a silicone sock, using a PLA printed Scorpio is not recommended because of the risk of melting). Finally, I used four 3xMA 10mm allen head screws to put the fan in place. Thanks for reading and have good 3D printing time! P.S.: Thanks Grami_fr! It really solved my PLA cooling printing troubles! P.P.S.: I printed it on my homemade Prusa clone because I was ready to print ABS.