Printrbot Printrboard cooling fan bar mount
by sfcgeorge, published
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Fantastic, thank you for sharing that! I'd hear of stepper driver chips getting hot and burning out but was told that the Printrboard didn't suffer from this. Interesting to hear otherwise. I'm glad I've been using a fan now that you've confirmed it's useful. One more thing you could try is turning down the trim pots so that less current goes through the stepper drivers as some early Printrboards were set too high (but setting them too low will cause missed steps too).
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Attach the top of the fan to the mount with 2 zip ties first. The 2 zip ties used to attach bottom of the fan must also go round the bottom threaded rod of the Printrbot, do this next. Finally wrap 2 zip ties around the middle nubs of the mount and the top threaded rod of the Printrbot - this is incredibly fiddly if the bot is already fully assembled but it is possible, try using pliers, tweezers and patience. Taking off the print bed would make it easier if you're really struggling.
I have provided the SCAD file so that you can change parameters to suit a different fan, but space is very tight down there and I haven't tested any other sizes so check your work!
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