Extruder barrel cooling duct for MK5-6 v6

prusaprinters

<p>This is a derivative of my own prior extruder barrel cooling duct. ( <a href="https://www.thingiverse.com/thing:8461">http://www.thingiverse.com/thing:8461</a> )</p> <p>It is optimized for a 40mm fan, which won't fit inside the 35mm gap between the two large sides of a standard MK5-6 extruder. I find that PLA prints much better with active cooling directly on the barrel itself.</p> <p>The section STL is for a replacement side to the extruder. It is functionally identical to the original small acrylic piece that fits there - except that it has a big rectangular hole to allow additional ventilation.</p> <p>I've of course included the OpenSCAD design files, but I didn't try to make the fan mount terribly parametric. There are some variables you could set, like thickness to all parts, but it's not fully parametric. If you have a different fan from mine (40x40x26mm) then you're going to want to redesign the fan mount anyhow.</p> <p>The reason for the DXF of the front acrylic panel was so that I could essentially create a virtual extruder holder for making sure everything aligned. If you uncomment the section at the top, you can see it too. ;)</p> <h3>Print instructions</h3><h3>Instructions</h3> <ol> <li>Loosen bolts and remove front acrylic panel from the extruder holder.</li> <li>Loosen bolts and remove the small left and right acrylic panels from the extruder holder.</li> <li>Replace right side with large fan mount and cooling duct.</li> <li>Replace left side with small hole-y side holder.</li> <li>Replace front acrylic panel to the extruder holder.</li> <li>Re-tighten all screws</li> <li>Connect new fan, possibly with use of these sweet fan connectors <a href="https://www.thingiverse.com/thing:8827">http://www.thingiverse.com/thing:8827</a></li> <li>Print with PLA easier!</li> </ol>