Cooling duct fan - Sunhokey Prusa I3

thingiverse

Cooling Fan Duct for Sunhokey Prusa I3 June 2015 Model. The Mounting Design Holds Two Powerful Blowers for Enhanced Cooling Designed to direct airflow away from the nozzle, this mounting is a perfect solution for those needing extra cooling during filament extrusion. The design ensures that air does not interfere with the print head and causes the filament to drop or jam. Setting it up correctly can enable small overhangs to be printed without any support. Versions: * Cooling fans mounting_default.stl: This version works perfectly with the standard print-head provided by Sunhokey Prusa I3. It is also compatible with most Chinese E3D V6 clones. * Cooling fans mounting_tall.stl: For users with taller print-heads, this version is designed specifically for their needs (please refer to links provided). To use this design, you'll need to disassemble the Sunhokey Prusa I3 print-head cooling fan and replace it with a E3D compatible click-on radiator 20mm fan (see instructions below). It's highly recommended that you print this design in ABS since it will be exposed to heat from the print-head. Although initially, I printed it in PLA without any issues, I still advise against using PLA. IMPORTANT! When printing with ABS, blower speed significantly affects temperature and may cause the parts to curl. I strongly advise activating blowers only when the first layer is completed and raising the print bed temperature by at least 20 degrees (my setup has a 130-140C bed). There's no effect on PLA prints. Print Settings: Printer: Sunhokey Prusa I3 Rafts: No Supports: No Resolution: 0.2mm Infill: 25% Part Notes: The design comes in three separate parts but due to lack of space for supports, it requires gluing together after installation of blowers. To prevent this issue, I recommend printing the part without any supports and then reassembling them afterward. If you prefer printing the entire thing together, I've added a note: "Unfortunately, I still lack 3D printing skills to pull this off." Post-Printing: Electrical Connection Options 1. Connect the blowers directly to the existing print-head fan using connectors or add micro switches for independent control over the two fans. 2. For full autonomy and precision, you can connect the blower pins to separate settings on the MKS board (still working on this setup). How This Was Created I designed this part in AutoCad software. Additional Custom Sections: * BLOWERS: These are compatible with my design specifications and provide standard 40x40mm fan mounts, but their exhaust is smaller at 26x17mm: * http://www.ebay.com/itm/271884324390 *RADIATOR FAN* Next step, you need a suitable radiator fan like the cheap ones found here:http://www.ebay.com/itm/1set-3010-Cooling-Fan-and-V6-fan-housing-and-V6-J-head-heatsink-for-3D-Printer-/271981865439or opt for an assembled unit such as: http://www.ebay.com/itm/All-Metal-J-head-Hotend-0-5mm-nozzle-with-Fan-PTFE-tubing-3DPrinter-Extruder-/271889250615 *TALL VERSION* The "Tall" design is tailored specifically for users with tall print-heads similar to my own, the default Sunhokey Prusa I3 print-head with M6*26 full teflon nozzle throat:http://www.ebay.com/itm/271885188834