Prusa Bear Power Supply Box for Meanwell PS

thingiverse

When I upgraded my MK2S to version 2.5, intermittent power supply issues began plaguing me. Choosing Preheat from the menu when the printer was cold caused it to restart. However, if I started bed heating, waited a few seconds, then initiated hot end heat, it would work fine. The initial startup surge overwhelmed my power supply. I suspected the new heated bed was drawing slightly more current than the original, thus exacerbating a marginal PS issue. Replacing the power supply at some point seemed like a good idea. When I installed the Bear upgrade (full), I opted to use the original and simply dealt with the problem. Later, I decided to replace the supply with a more powerful, better quality unit. The Meanwell NES-350-12 caught my eye; it's larger than the original so a new box was in order. I had previously modified the Prusa box to accommodate a 2 port USB adapter and wanted at least that in the new box. When designing this, I made it taller than necessary for just the supply to allow room for additional power adapters, power meters etc. as desired. The mounting holes on the PS were offset by 1mm from the original so I remixed the Bear mounts; while not strictly necessary, this precaution ensured no interference with the bed. I have provided two versions of the box: one plain and one with a cutout for a USB adapter from Amazon's B073NCMTQL. The design also features a new switch/power outlet facing to the rear (Amazon's B01FREPXKA); you may need to copy/paste these links into your browser, as Thingiverse links to Amazon currently appear to be broken. For hardware, the original screws that hold the mounts to the PS are sufficient. Two more of these (4mm x 8mm socket button head) are needed for the end of the box to PS, along with two 4mm x 8mm socket flat head screws for the side of the box. The original wiring was adequate; however, if you plan to install a USB or other adapter, additional wire and connectors will be necessary.