Slim Rostock Max V3/HE280 Fan Shroud, Light Weight, Rounded

thingiverse

BIG UPDATE 11/7/2017:\nAfter numerous redesigns and tests, I am posting the fifth version, which I hope will be the last. This shroud fits snugly within the slim enclosure and allows printing to the edge without hitting the bed clips. The autocalibration wizard and OctoPrint plugins run flawlessly. To see how much this improves bridging, I should do some bridging tests, but it does put a lot of air on the plastic without cooling the nozzle. Note that the green bowden coupler above the fans allows for easier filament changes when the tube is tightened into the HE280 hot end. STLs are included for the coupler and a Tall PTC tool to enable tightening down the bowden tube without removing the fans. The coupler uses the following fittings: https://www.amazon.com/gp/product/B01IB81IHG\nAll parts have been reprinted in Yellow PETG for strength and heat resistance. I think that the fan shroud might be too close to the heater block to use PLA.\nNote 3/23/2017:\nI recognize that these shrouds cause issues printing at the very edge of the bed due to the bed clips and the enclosure wall. These shrouds currently prevent the 10-point auto-calibration via the SeeMeCNC wizard or the OctoPrint Delta Plugin. I am working on a redesign, but it's not ready yet. If you want to run the 10-point auto-calibration, please remove the fan shrouds to prevent crashes.\nUpdate 1/24/2017:\nV2 is based on feedback that the shroud exit was too low and was hitting prints. This version gives more clearance (1mm from bottom to nozzle exit with the stock nozzle) and directs the flow below the heater block. I've also slimmed the main duct to reduce the chance of arm collision.\nOriginal 1/23/2017:\nFrom Noircogi: "This mod moves the three-part fans on the HE280 in and up above the hot end. The point of this mod is to allow a narrow enclosure. The stock part fan layout moves the fans considerably outside the base frame when the head is near the bed limits. This allows full travel with a narrow enclosure.\nAirflow is a bit less, but better directed. You still won't need to run the fans at 100% in my experience.\nYou will need to trim the small plastic tabs on the effector plate before installing the shrouds."\nI would also like to credit http://www.thingiverse.com/thing:1900098 for inspiring the shape of the end of duct and the wall thickness, and for pointers to the hotend models.\nMy contribution here is to make the part lighter, more rounded, and improve the direction of the airflow towards the space directly beneath the nozzle. On my hotend, the shroud easily clears the bed/part when using the stock nozzle. This means that with longer ED3 nozzles, there should be no clearance issues at all.\nPrint Settings\nPrinter Brand: \n SeeMeCNC\n \n Printer: \n Rostock MAX\n \n Rafts: \n Doesn't Matter\n \n Supports: \n Yes\n \n Resolution: \n 0.5mm Nozzle, 0.2mm Layer Thickness\n \n Infill: \n Doesn't matter.\n \n Notes: \n This part is designed to have two pass walls with a 0.5mm nozzle. This leaves it light and plenty strong.\nI printed this at 45 degrees with the duct pointed up (see picture) and support everywhere. This results in some external support and a small internal support pillar that can be reached through the fan opening for removal.