Sennheiser Momentum True Wireless Charging Case

prusaprinters

How i designed thisThe hinge on my stock case brokeA new case is $100The earbuds cost $100 used…Spent several weeks desinging a new one from scratchHow to printI printed it in PETG, but PLA should also work.The 3mf file includes tuned support settings that i found to be optimalSupport removal is a bit tricky with this one, be careful not to damage the modelYou will needA bit of Filament4 7x1 mm magnets4 M3x12 screwsSidecutters or a knifeScrewdriver with a small philips head and a 2.5 mm hex bit (here's a cool electric one I made an awesome magnetic case for)How to assemblePry apart the original case (it uses clips all the way around, can you manage to not break them?)Unplug the battery, then remove it from the bottom part of the case (its stuck using double-sided tape, don't remove it, you will be reusing it)Unscrew the board (fixed with 4 phillips screws)Take 4 7x1 mm magnets, glue them into the corresponding slots in the middle part and the lid (MAKE SURE THAT THE LID IS ATTRACTED TO THE MIDDLE)Take the lid (just the lid) and put a piece of filament though the hinge, cut it to length, then pull it outCombine the lid and the middlePut the filament you've cut though the hinge (this can tricky, giving it a bit of a bend will help)Attach the board to the middle part using the original screwsConnect the battery to the boardStick the battery to the bottom of the caseAttach the bottom to the middle using 4 M3x12 screwsPlug the case in and see if the led in the back lights up.Issues i can't be bothered to fixI've printed more than 20 of these to get to this point, and it works fine as is, but there are things that can still be improvedThe use of screwsI really wanted this case to be snap fit but couldn't design clips that could hold it together well (or at all, to be honest). I would LOVE to see a remix that fixes this.The wobbly back plateThe back plate can be bent in with a finger. Mine didn't break yet, but it's probably a good idea to add something that would hold it in place betterThe shape of the holesSince i don't have a 3d scanner, i was only able to model the holes approximately. The headphones do fit and charge, but it's not ideal.Chamfered edgesThis case is actually smaller that the original, but it looks bigger because it has relatively small chamfers instead of fillets that are present on the stock one. The issue with adding bigger fillets is that the battery might not fit in the bottom because of that. I did not test this though.