Soldering Fume Extractor

Model Notes
 

Joinery

The fan housing, filter housing, and junction box are joined together using sliding dovetail joints. There is a single fastener on the back of the junction box that makes it impossible for the joints to slide (without something breaking).

In my experience the fit of these joints varies by filament. Printing these parts in ABS and soft PLA (Polyterra) resulted in a great fit. However, with harder PLA (Polymax), there was too much friction in the joint. If this happens, try filing the faces of the dovetail slightly using a flat edge file.
 

Filter housing

The carbon filter tucks under the lip that runs around the inside of this part. The filter that I purchased came in a large sheet that I cut to size with a pair of kitchen scissors. 
 

12v connector brace

The 12v connector brace (seen in blue TPU in the pictures) needs to be printed in a flexible plastic. It holds the connector in place with a friction fit and needs to compress slightly to be installed in the junction box. Place the female end of the connector into the hole, then push the braced end right to left to force it into place.
 

Junction box variants 

1. Gooseneck Arm:
   
   My original plan was to make use of a flexible gooseneck arm that I salvaged from a cheap magnifying lense. I wanted to match the look of my Kotto third hands, which snap onto a steel plate using a magnetic base.
   
   After assembling the fume extractor and snapping it to the base, I discovered some issues. The length of the arm made it difficult to position the fume extractor effectively, and made the base plate unstable. The arm also wasn't quite thick enough to support the weight of the fume extractor in all orientations. 
   
   I think with a different arm size this could still be a good choice. Especially if you have a heavy metal object nearby your soldering station, or a metal workbench.
   
   To embed magnets in the magnetic base, use the slicer software to add a pause before the layer that covers over the internal cavities inside the base. Resume the print after placing the magnets.
    
2. Multifunction Arm:
   
   See https://www.printables.com/model/165239-multifunction-arm-mounting-system.
   
   The mounting holes of the junction box align with the mounting holes of the "small-nut-M3” holder of the small arm system.
   
   Even the small version of the multifunction arm system is very strong. More than enough for holding this fume extractor. 

Printing Notes

All models can be printed in the orientation found in the .3mf files. The junction boxes and filter housing need to be printed with supports. 

I used a 0.2mm layer height for all prints.

Parts
 

Fan: 
https://a.co/d/boiHwul

Fan controller: 
https://www.aliexpress.com/item/1005005970118917.html

Carbon filter: 
https://www.aliexpress.com/item/32789944517.html

12v power supply & female connector: 
https://a.co/d/ayxZA5W

Magnets: 
https://a.co/d/2Ownwtu

Fasteners:
1 x m2.5 heat-set insert
1 x m2.5 machine screw

  Multifunction Arm:
  4 x m3 nut
  4 x m3 machine screw

  Gooseneck Arm:
  2 x m3 nut
  2 x m3 machine screw