WellFan with Tool Holder

thingiverse

I was thrilled to discover [WellFan by OderWat](https://www.thingiverse.com/thing:2967389), a design featuring an 80mm fan for silent operation of the MeanWell LRS-350 PSU, but I was disappointed when I realized that the excellent [Tool Holder by spammers](https://www.thingiverse.com/thing:3321292) designed for the same PSU was not compatible. I decided to combine the two designs to get the best of both worlds. The tool locations were modified to facilitate printability and ensure they fit the case. My version has only two rows for tweezers instead of three, in order to accommodate the case width. I've included OderWat's original case parts for your convenience. Parts two and three are his unedited work. His original thing also includes Fusion 360 files. <b>Parts Needed:</b> 1) An 80x25mm fan. I chose a Noctua NF-Ru redux-1800 for its CFM and noise, but many people prefer the Arctic F8 Silent. 2) A 3-2 pin adapter if using one of the above fans. Few fans use two-pin connections. <b>Installation:</b> 1) Remove the four screws from the Mean Well PSU cover and remove it. The fan is connected to the board, so don't pull off the cover until you've removed the fan. 2) Test fit the printed cover to ensure your tolerances are good. Nothing's worse than preparing everything only to realize the part won't fit! It wouldn't hurt to verify that you can get a screw through the hole in the tool holder. This tolerance is quite tight (about .25mm); it worked for me but you may need to wiggle the screw through if the holes didn't bridge well. 3) Install your new 80x25 mm fan in the printed part. My fan came with screws, but you might be able to reuse the ones from the Mean Well if needed. Unless your fan has a two-pin connection, you'll require an adapter. 4) Regardless of whether or not you're using an adapter, you need to reverse the two wires that connect to the board - for some reason, Mean Well has these swapped from the norm. This can be done by pressing in the retaining clip on the plugs, removing them, and reinserting them in the other slot. 5) If upgrading from the stock PSU on the Ender 3, remove it now. Unscrew the bottom section and steal the plug, installing it in the new part using the same screws. 6) If you haven't already, adjust the voltage on your Mean Well PSU to 24v. [Video guide here](https://www.youtube.com/watch?v=4e7gcpCv4ew), if needed. 7) I suggest wiring your PSU now, as trying to do it with the cover installed is a hassle. 8) Install the new cover using the four screws you removed from the original PSU cover 9) Reinstall the PSU onto your printer. 10) Enjoy the quiet of your new fan and the tidiness of the integrated tool holder.