I was building a lack enclosure and wanted something to manage airflow for the times when I do not need it warm (PLA & PETG), along with managing fumes from things like ABS. I also wanted it clean, with minimal wires and things in the way. Plus if you believe some of the recent articles around 3D printing "nano particles", this may help with that.
The real goal was to have a minor negative pressure on the case, enough to pull fumes and particles through, but low enough to avoid temperature drifts in the case.
The files attached consist of the sleeve and bottom flange, the cartridge that the pads go in, and the top fan that the fan mounts to and drops in.
I used PLA for mine at .2 layer height, at 20% infill. Since it isn't something that has a lot of stresses, don't need to go crazy.
- Cut hole in lack table the same size as the sleeve, this piece goes in from the underside of the table and will be flush with the top. I used hot glue on the flange and that was more than enough to secure it to the table.
- NOTE - Make sure you place the notch in the sleeve in the same direction you plan to run the wire to the leg. That notch is for the cable and the plug that goes into the fan, as that plug sticks out just slightly.
- To run the wire to the fan, you can easily drill a hole through the top of the leg, the printed corner piece, and the underside of the table as the legs are hollow. The inside of the table is paper, so easy to push through. See the attached picture of how I completed this.
- I did have to cut the wire to run it and added a molex connector to it so I could also disconnect the fan later if needed. Note the notch in the top of the lack table, this is to get the cartridge past the wire.
- The wire runs down the leg and there is an additional molex connector for when I need to remove the top of the enclosure.
- The carbon pads are just cut to size and placed inside the cartridge. Make sure the grid is pointed up to keep them from getting into the fan blades.
- The fan is mounted to the top piece using the screws and wire guard that came with it. It also does include rubber bushings to help with noise, they are between the printed part and the fan on the inside.
- NOTE - I did have to cut the screws down with a hacksaw by roughly 3/4". The circular notches in the corner of the cartridge is for clearance of the nuts on the fan mount.
General notes -
- With the fan on full. the airflow on this is low with 4 pads installed. It takes care of most of the fumes on an ABS print, without really affecting internal temp much.
- The fan is super quiet (even on full) if you are concerned with that.
- There are higher speed versions of this fan, but I went with the quieter one. Wishing now I had gone with the higher CFM.
Any questions, please feel free to ask!
EDIT - 12.21.18
I added an STL for the cartridge that is 12mm thinner to work with the following fan:
While it is double the CFM, it cuts the amount of room for filter material by about half.