MendelMax 2.0 Fan Mount

by JohnSL, published

MendelMax 2.0 Fan Mount by JohnSL Aug 25, 2013
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Update 1-1-14: I've added a new version, Fan Mount 5, that has more of an angle, to point the fan more toward the tip. I've found this new angle provides better cooling.

Since I'm printing with PLA, cooling the part while printing is very important. I hadn't been happy with the cooling on my MendelMax 2.0, so I set out to find the best solution, starting with the front-mounted fan suggested by Makers Tool Works. The front-mounted fan worked OK.

At a suggestion of a friend, I next tried OhmEye's fan duct. This did a good job cooling the part right near the print head. It didn't, help as much when printing larger parts.

Next I tried two fans mounted on the sides, facing the nozzle. This was the least successful solution, as it didn't provide enough air near the nozzle.

Finally, I found OhmEye's new fan mounts, shown here: http://www.ohmeye.com/2013/new-mendelmax2-fan-mounts/. I didn't like his actual mounts, so I designed a new set.

And the set shown here works really well, better than any of the other approaches I tried.


You'll need the following:

  • 2 24-V fans. I purchased these from Makers Tool Works, and they came with nice long cords
  • 8 M3 nuts (or 4 if you use zip-ties to hold the fan to the bracket)
  • 4 M3 x 25 screws (not needed if you use zip ties)
  • 4 M3 x 10 screws (if you're using nylon washers) or 4 M3 x 8 screws without the washers
  • 4 M3 (or #4) nylon washers

I chose to use nylon washers between the tops of the M3 x 10 screws so I wouldn't scratch the finish on the metal carrier piece, but you don't need these washers. Just use the shorter M3 screws if you choose not to use the wahsers.

  • Using M3 screws and nuts, attach the mount to the X carriage
  • User either long M3 screws and nuts, or zip ties to attach the fans to the mount

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Did you put the 2nd fan wires in same outlet as first fan or use Fan2 plug in?
I want to make sure I wire it correctly

I connected both fans to the same output.

Thanks. I really like these mounts :) Been using them for a few days now. Side note: what is that piece covering your extrusion lower guide? Never seen that before.

I used KISSlicer and the print cane out just fine...it did complain a little about some problems, but KISSlicer fixed them, and all printed well for me with no other modifications needed.

Hmmm. I just loaded it into Slic3r and it didn't get any messages about holes. Which version of Slic3r are you using? I'm using 0.9.10b.

I appreciate you sharing this; but it fails to print. Specifically, Sli3r indicates a hole. When I print it, it only prints the top 1/2 of the object. I'll try to fix in netfab tomorrow but I thought you should know that at least with the Sli3r to Pronterface toolchain that the print is not successful.