Monoprice Select Mini V2 bed cable re-route through 40mm fan hole

thingiverse

I had a common bed temp sensor issue with these printers, which I fixed by repairing the wire and then sought to prevent from happening again. I didn't find exactly what I was looking for, so I decided to make my own. This mod is a re-mix of https://www.thingiverse.com/thing:2198351 inspired by https://www.thingiverse.com/thing:2376061 There's no cutting or drilling required for this mod. It works with a few different cable chain models out there, and I used https://www.thingiverse.com/thing:611593/ for the ends. However, I'm using a cable chain that a friend had printed for me while my printer was down, and I don't know its origin. I needed 10 links for my application, so it's a good idea to print a few more than 10 just to be on the safe side. You'll probably want to print the fan shroud with supports. If your printer does really long bridging well, you may be able to get away with printing it upright without supports, but I didn't try. To install this mod, you'll need to provide your own screws to mount the fan to the shroud and the fan opening chain adapter. Two of the stock 40mm fan mounting screws can be used to mount the shroud to the back of the printer. You'll also need to locate some screws (fairly short) and nuts to secure the bed mount part. Installation Instructions: Note: Please only install this if you're comfortable working on mechanical and electronic devices. It should go without saying, but you're proceeding at your own risk. Be sure the printer is unplugged and cool before you begin. Whenever handling wires, be sure not to pull too hard on connectors. Also, always make sure that all wires are clear when tightening any screw to avoid pinching the wire. Tools required: * Phillips screwdriver * Something to cut wire ties 1. Remove the 4 screws that hold the 40mm fan in place on the back of the printer. 2. Set the printer on its back again and remove the bottom panel like before. 3. Mount the 40mm fan to the flat side of the shroud (not the side with the notch at the bottom). 4. Position the printer so that the upper-left screw hole for the rear fan is accessible by hanging just over the edge of your work table. 5. Feed the wires through the notch in the fan shroud and then line up the fan shroud with the original fan mounting holes on the back of the printer. 6. While holding the fan shroud in place with one hand, use one of the original fan mounting screws to secure the upper-left corner (in relation to facing the back of the printer) of the fan shroud to the printer chassis. 7. Repeat the last step to secure the upper-right corner of the fan shroud. 8. Reconnect the bed heater and thermister connections to the circuit board. 9. Re-position and secure the bottom panel of the printer, taking special care not to have the fan in contact with any wires. 10. Gently pull on the bed heater and thermister wires to take up excessive slack inside the printer. 11. Secure the fan chain adapter to the back of the printer with two screws, being careful not to apply too much force as it could break the fan shroud since it is not supported from the other side. 12. Attach cable chain links as needed for cable length.