UM2 Fan Duct V2

youmagine

Version 2 of my Fan Ducts are designed to suit the Olsson Block, which can be used with a standard print head by removing 3mm from the top of the Boss and Latch. UPDATE "V2 R" is a removable set that just slips off, and a small fan stow part has been added. If using dual nozzles, print a mirrored version of the Left Hand Fan Duct. The ducts don't require any fasteners to attach or for the fans; they swivel out of the way to allow easy access to the nozzle, and are vertically adjustable, allowing adjustment for nozzle differences in set up. They also fit if using my Rear Heat Sink Fan Duct on the Rear Fan. Check out this modified Print Head Bottom piece on Youmagine to allow cables to exit and the Heat Sink Fan Duct: https://www.youmagine.com/designs/print-head-bottom-modification. Print Settings for Cura are 0.1mm Layer Height, 1.2mm Wall Thickness, 20% Fill with Brim and Support everywhere. It's suggested to print in the orientation with duct outlets flat on the build plate. After printing, remove designed support for the rear boss (Shown in Red) and all support structure; clean up any bits and clean out the rear boss with a 3.0mm drill. Height spacers are printed together on a sprig just separate to use. Fitting involves removing existing fan ducts, unscrewing fans, adding a Top Screw Spacer, and reassembling while passing through the Fan Duct Boss. Repeat for other side ducts, fit Top Screw Spacers to front screws as well. The Fans are a push fit into the ducts. Height adjustment is achieved by sliding the ducts up and down on rear screws, allowing for vertical adjustments with the latching providing enough friction to hold in place. Printing of spacer sets will give 0.5mm, 1mm & 2mm thick spacers that slip onto rear screws below the ducts, allowing repeatability of position. Remember to latch ducts back into position after any adjustments have been made before "HOME HEAD." There's a great improvement in air flow, so you may need to reduce the percentage flow depending on your heater. If running the Olsson Block, there's a 35W heater available from 3Dsolex. What Duck? Designs hope you enjoy this design, which was inspired by Ultimaker 2 single-and Dual-Head Fan Cages (CPv9) by mnis with screwless fan mounts and swivel features. Let me know how you get on using these ducts and any comments etc. This second version has improvements due to suggestions and requests. UPDATE: There's now a removable set, the "V2R," along with a Fan Stow. After warping the bottom edge of the duct when printing with a bed temperature of 100 degrees and zero fans, I've redesigned the back boss to a C so that it can be slipped off when not needed. The Fan Stow can be printed normally and mirrored to hold the fans in a stored position when the ducts are removed if printing with 0 fans. It takes less than 60 seconds to remove the ducts, remove the fans, fit the Fan Stow parts, and slip in the fans, and the same to reinstall the ducts, so no great effort. 21/12/2015 UPDATE: There's a slight alteration to all Tabs to slightly increase friction; if too tight, gently file away material to suit. Added new version "V2F" with fixing mounts to match original screw holes on the print head, which can be used with or without fixing screws if wanted.