40mm fan redirect vent Replicator 2 Stepstruder Mk8
by Gozeeta, published
Update 10/8/13:- Sorry this took so long, fredzemail74 made his own redirect vent that I actually like better (thanks, fred): http://www.thingiverse.com/thing:107080
The difference in airflow is noticeable, though I haven't printed as much since that replacement. Research on whether or not my thing is detrimental to the fan long-term has not been done. Y'all should try both and see which you like.
My larger prints were lifting from the platform because the fan from the stepstruder was blowing cool air off the metal frame and onto the build platform, cooling the PLA more than needed. This vent forces the exhaust upwards and minimizes that effect. At 5mm it's the same thickness as the existing chrome grill and a replacement for it. The .stl and .sldprt has a blank face but I added a P for style pointz.
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These were just the settings I used. I haven't tried with others because it worked the first time (luckily) In MakerWare: Medium slicer with support enabled 20% infill, 2 shells .25mm layer thickness default temps and speeds placed in the back right corner (warmest part of the build plate)