Buck-Converter case for Bear-Frame

prusaprinters

I created a buck-converter mount for the bear upgrade frame which can be mounted with M3 screws. This step was needed since i did a bear upgrade on my i3 which now is running klipper and requires a rpi which needs to be powered with 5v. Of course it is possible to add the dc converter to the mcu case but then this grows bigger and bigger. As a result i designed a case which can be easily mounted on the backside of the printer.It is designed for a standard DC Converter with voltage display → see https://www.amazon.de/gp/product/B07VWHRW34/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1It can hold an 30x30x10mm 5v fan (the pi fan) for a sufficient cooling → see https://www.amazon.de/GeeekPi-Raspberry-Brushless-K%C3%BChlk%C3%B6rper-retroflag/dp/B07FVR3TB8?th=1 Print SettingsResolution: 0.2Infill: 25Filament: PETG AssemblyAfter printed all three parts you need to glue the mounting-plate on the bottom of the case (i used some superglue here). Make sure the backplate is aligned correctly.I splitted the case so that it can be printed without supports.Afterwards insert some threaded m3 inserts into the 8 bigger holes of the case:4 on the top edge holes (for the cover)4 on the bottom raised holes (for the bug converter)Next you can attach the converter and fix it with 4 m3 screws (M3x8 should be sufficient).Now you can mount the case on your frame using 4 m3 flathead screws (M3x12 should work, otherwise use a shorter length)Tip: I used some printed T-Nuts which can be applied after the frame is fully assembled. You can find them here: https://www.thingiverse.com/thing:3050607Optional: Attach the 30x30x10 5v fan to the lid. Then plug it into the output of the dc converter (this can be a bit fiddly!!!) Take your time here and make sure that the connections are solid → I also used some drops of hot-glue here to hold it in place.