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40mm Ducted Fan Shroud
by Kidlatj, published
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40mm fan ducted shroud for the prusa mendel with Lm8uu's and a J-head extruder. this has a flap inside that can adjust the amount of air to the hotend. It snaps in place between the LM8UU brackets but some additional doublesided tape or whatever might also be desired. the hotend duct lines up with the vents on the J-head mk4 extruder while the other duct shoots down evenly around the extruder (missing the nozzle) onto the freshly placed plastic. This is great for sagless bridging and sharper corners on your prints.
Update: Adjustable Damper added (see section view) also created a version that mounts to the Slim x-carriage at http://www.thingiverse.com/thing:16208
Update 2: Added a larger diameter vent version that will fit the Prusa V2 carriage and larger sized extruders. I also included the source Revit file.
there is a smallish tab that can optionally come off that is needed to help bridge the gap on the inside fan opening. There is some crazy bridging going on so I suggest using a fan. This is my first upload here, this part was created in Revit and 3ds Max and for some reason Skeinforge complains about it a little bit but it still prints just fine.
Update: The added internal damper can use a short section of 3mm filament as the hinge pin or substituted with a nut/bolt.
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40mm Ducted Fan Shroud by Kidlatj is licensed under the Creative Commons - Attribution - Share Alike license.
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