What is it?
Since power supplies for the Prusa i3 mk3 seem to be unreliable, I designed a PSU cover so you can use a Mean Well NES-350-24 or it's replacement the LRS-350-24. The only difference between the two is that the LRS-350 is a thinner 1U form factor. The cover was designed to keep the same sleek look as the stock PSU. Any feedback is welcome.
You can use the stock screws and nuts for the bottom PSU cover plate. Those are M3X8
6 M4X10 flat head screws
2 M4X12R to mount the PSU to the Prusa frame.
2 M4 Nuts up to 3mm thick
IMPORTANT: The screws that attach the PSU to the Prusa frame must not be too long. If they are, they will press up against the power supply and warp the frame. Only tighten these enough to make the PSU snug.
03-12-2018: Removed LRS bottom plate due to an alignment issue. Use the NES Version. They are compatible.
03-22-2018: Added Fusion360 files. Keep in mind this was my first major project using the software. Had trouble keeping the LRS version clean because I modified the NES version to do it. So beware, it's not the most elegant project :)
- The Mean Well PSUs mount with M4 hardware. I chose countersunk screws
- You will need two M4 Thin nuts to mount the adapter plate to the Prusa Frame. You will also need longer screws to mount the plate to the frame.
- I had to notch out a small area on the PSU bottom plate to make clearance for the rear extrusion frame. This 6.5mmX 6.5mm area may need minimal supports. Feedback on this is welcome.
- I have not tested the LRS-350 Version because I do not have this PSU, but luckily Mean Well provide schematics for their PSUs. Let me know if I need to make a change.