sqfmi / Watchy

Watchy - An Open Source E-Ink Smartwatch
http://www.sqfmi.com
MIT License
2.04k stars 335 forks source link

Aluminum top case doesn't _quite_ fit PCB (easy fix though) #66

Open notmatt opened 3 years ago

notmatt commented 3 years ago

Leaving this here for anyone who runs into a similar problem, or maybe an addition to the FAQ or troubleshooting sections. My top case didn't quite fit the PCB, and the problem ended up being the leftover tabs from PCB manufacture. There's four of them, two on each of the right and left sides.

watchy_tabs

This is an easy if delicate fix: the components do not have a lot of clearance from the nominal edge of the PCB! But one or two light strokes with a small file, taking care to keep it perpendicular to the PCB, and problem solved:

IMG_8954

notmatt commented 3 years ago

Anticipating a couple obvious questions:

No, it wouldn't force in, at least not with the amount of pressure I'm comfortable exerting on a PCB.

No, absolutely zero wobble after this. The manufacturing tolerances on the case and PCB are tight (modulus those tabs, but that's hard to avoid).

SnoopJ commented 3 years ago

Confirming that I (and some folks on Discord) had the same issue, it appears the tolerances sent to the shop were indeed very tight. I knocked down the tabs with some 150 grit sandpaper and the PCB settled down nice and snug after that.

mpboddie commented 3 years ago

I had the same issue but I also had to lightly sand some extra bits of aluminum from the inside of the aluminum case by the USB port on the top half. Once I got rid of the extra pcb tabs and rough aluminum edge, it fit well.

GuruSR commented 3 years ago

Just a suggestion:

For the high peaks, a hobby knife to take some of those off, the other part, a decent emery board (yes, for nails), fits perfectly in those areas and you won't run the risk of damaging anything nearby because there is no grit on the sides.

Mine went in fine doing what I suggested.

bushmango commented 2 years ago

Thanks! Filing these down with a metal file worked for me