Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!


by Tanukifu, published

cjt-extruder-cooling-duct by Tanukifu Jun 22, 2012
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This is a fan mount/duct design for my modified printrbot extrusion mount. Standard 40mm fan mount -> designed to get the air right where I want it to remove heat from recently extruded filament faster while printing.


I have included the sketchup so you can modify it to fit your needs.

There are two other related components -> a modified x-axis carriage (thing:25472) and a modified extruder mount (thing:25471).

A bit more about them here: http://tanukifu.blogspot.com/2012/06/redesigning-some-printrbot-parts.html

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This is exactly what I have been building in my head. I've got the LC, so some mods to the extrusion mount would be necessary. Awesome design though! Any reason you would not print this as one part with the extrusion mount?

I thought about fusing both parts together but I ended up not being able to find a good solution for access to the screws to attach to the carriage. I almost went down the path of fusing the carriage/extruder mount/duct as one part but then I thought that's a lot to print when I make changes so for now they at least they are all 3 parts.

The current 3 modified parts appear stable printing over 200mm/sec so far -
gt; need to spend more time testing and then I may just fuse them all together in one part.

I'm interested in seeing how this mounted. Thanks!

I tried to add a couple of images but in case I didn't do it right there are a couple here (http://tanukifu.blogspot.com/2012/06/redesigning-some-printrbot-parts.html)http://tanukifu.blogspot.com/2....

The modified extruder mount isn't hard to print and doesn't need any extra parts. It should work with the original x-axis carriage (but it's a bit wider than the normal mount).

To get much much better stability the modified carriage works well (small loss of print area but in practice that doesn
't matter much(. Unfortunately it requires more bearings which not everyone has on hand.

The sketchup should be relatively easy to mod. to work with the standard parts (probably best to make a thin plate that would go between the extruder mounting bolts and connects to the top of this duct - you c
ould go far a plate between the extruder and the mount that extends out but that effectively raises the hot end tip). I couldn't find a solution I liked so I just made a different extruder mount.