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