Prusa i3 Mk3 PSU Replacement Brace

thingiverse

I'm working towards enclosing my printer. For this, it's advisable to locate the PSU outside the heated chamber and replace it with a replacement brace to maintain the frame's stiffness. There are several options already available, but I wanted to design my own version that uses less plastic to print, provides optimal visibility of the print surface while maintaining high stiffness. To achieve this, I rotated the aluminium extrusion that typically holds the PSU by 90 degrees so that the two T-nuts face outward on the side rather than upward. This allows a replacement brace to be mounted, aligning loads rather than relying on smaller brackets to connect with the original mounting locations. Simply undo the 8 screws holding the aluminium extrusion in place and rotate this part, requiring no further disassembly. The bracket necessitates purchasing a single M4 nut (I used a nyloc nut but this isn't required) and a longer (M4x12 minimum) screw. I'm aware that this is an inconvenience, but I find that M4 is a suitable size for other 3D printed projects and electronics as well. It also features a distinctive octagonal pattern on the outward facing surface to maintain consistency with the Prusa design. The concept version shown in the picture was printed in PLA, but I'll reprint it in PETG now that I know it fits and functions correctly, as I fear PLA will lose stiffness in a warm enclosure. I hope you find this idea as appealing as I do. As always, I appreciate comments and feedback.