Tevo Black Widow Nozzle Fan Duct

thingiverse

This is a maker-designed and tested nozzle fan duct specifically made for the Tevo Black Widow with its stock hot end, featuring 360-degree cooling.\nIt includes fittings for thread inserts for a 40x40mm fan, along with a 5mm hole for the mounting bolt. I advise you to research the required fan speeds for your desired print quality.\nCheck out photos for assembly instructions, fitting illustrations, air flow pictures, and suggested prints. (The printed part shown didn't have a nozzle fan installed and used stock stepper drivers)\nDimensions: 41mm wide, 102mm long, 52.5mm high.\nWeight: 32 grams.\nAutodesk public download link: http://a360.co/2ng0qqa\nPrint Settings\nPrinter:\n Tevo Black Widow\n \n Rafts:\n Yes\n \n Supports:\n Yes\n \n Resolution:\n 0.2mm\n \n Infill:\n 30%\n \n Notes:\n For optimal results, print the two halves with outer sides facing down. This allows for optimized quality of the fan hole, inner duct, and bolt holes.\nMinimal support is needed with two halves, but it significantly increases final part quality.\nPost-Printing\nStep 1\n Remove support material. I prefer using a pocket knife, file or sandpaper to smooth out edges.\n Step 2\n Apply hobby glue to inner sides of the halves, use the locator to place the two halves together, and position the part on its side for at least 1 hour, or until glue is completely dry.\n Step 3\n Install 5mm thread inserts into the holes.\nNote: You might need to glue your thread inserts in if they are loose, or drill the hole slightly to fit them in, depending on the size of the thread insert and the quality of your Black Widow prints.\n Step 4\n Install a 40x40mm fan, and bolt it into the thread inserts.\nDon't over-tighten the bolts; they just need to locate the fan and prevent vibration.\nNote: Make sure the fan air flow direction is pointing down and into the duct. Also check the fan speed with your print settings, as running at 100% full-time may not be necessary, depending on your printing quality research.\nAlternative: Use hot glue to fix a fan in place for a long-term or temporary solution.\n Step 5\n Using a 5mm bolt and nylock nut, mount the duct onto the Black Widow gantry far lower left hole, and centre the nozzle hole with the nozzle. Ensure that the BOTTOM OF THE DUCT is ABOVE THE NOZZLE TIP to clear the print. It's designed for cooling only, not smoothing.\nNote: I used a 20mm thick fan, which managed to clear the lower gantry V wheel. If you want more clearance with moving parts, use a 10mm thick 40x40mm fan.\nAlternative: Use hot glue to fix a fan in place for a long-term or temporary solution.\n Disclaimer\n This is my first nozzle duct design, and I'm mostly sharing it with fellow Tevo makers to help them on their journey. Keep an eye on the duct as it goes, and send me any design feedback for updates. If you print in PLA, as I have, be aware that the nozzle is hot and close to the duct, so it may or may not cause drooping of the PLA part. If this happens, stop printing immediately to avoid collision and damage to your printer. It might be worth printing in ABS in this case, or using a cutoff of 1mm sheet metal glued to the bottom of the duct to prevent warping.\nAs of uploading this item, I have printed 3.5 hours without any change in the shape of the duct.\nHow I Designed This\nA Dozen Iterations Later...\n My design philosophy for printer parts is to keep the parts as lightweight as possible to reduce stepper motor load while implementing full function and style.\nI designed ten versions with an angled fan, but found too many complexities hollowing the duct. Finally, I took Dieter Rams' design approach, simplified the fan position and overall body design, and created a circular outtake for greater cooling effect.