Made @fruitkillr's fan mount printable on the tiny monoprice delta mini. You'll need 3 plates, 3 legs and some glue to fit them together.
Those two parts repeated thrice should give you all the necessary holes for the square shape of a fan.
I've glued mine on the workbench, but it then had to remove a wall or two on one of the corners to click neatly inside the recess. If I had to do it again, I would screw all three legs in and glue the plates in place (being careful not to put glue on the printer!
Optionally I realize now it might be possible to invert the tabs on the parts and have the leg part retain the bracket without glue.
To design this I've loaded the original STL in blender, cut it in three and then separated each screw hole into its own little screw and left those in place. Then I've rotated one of the thirds 120 degrees twice and put screw holes where screws were. I then tried to print that thing and realized it was still too big! Cut it in half, separated the leg and a bracket, added tabs to them to allow gluing and mirrored them back into whole parts.
If I had to remake them, I would:
- Improve the tabs to be longer and with bolt holes to create a mechanical connection with fasteners instead of only glue
- Make the plate just a tad bit thicker. It feels strong enough now that the fan is on, and it is screwed on the printer but it pretty much as thin as it can reasonably be - I'd like to add some margin of error there
- Add a hole to the plate to allow an extra fastener in the extrusion rails on the sides.