ahhhh today was intensely frustrating

set out to mill one PCB. Spent five hours on that then gave up because the damn pcb stock was just too distorted and nonplanar.

Found and fixed a very tricky problem on my oled display board using the hardest SMD rework I have done to date. Was very happy, proud and excited to see the panel in the case, so I made a small adjustment to the display location on the board and somehow managed to break my (only) display in the process.

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I know in the bigger scheme of things I'm doing great, but these smaller setbacks are SO HARD to suck up man.

haven't been making keys for two weeks because opening the mold and seeing some with no feet bc air bubbles or finding another crack in the mold. just. sucks.

At the same time I feel like I'm so close it's not worth to make a new mold, try a different way of compressing it or another solution to the air bubble problem

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should've maybe CWd this with "venting", sorry

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@s_ol what material are the keys made of? could bubbles be moved to a safe zone with vibration while the material is still liquid?

@voxel
These prototypes are made of epoxy, see process docs here: fabacademy.org/2020/labs/opend

I've tried vacuum, but it barely made any difference, I'm not sure if vibration would be any better. This only started to become a problem as I fiddled more with other parts of the process (how to get the keys out of the mold after), before that I only ever had small bubbles on the inside. Think I just have to go back a few steps.

@voxel
The page above doesn't really document all of the things I've tried after the first two keys, I'll have to update that eventually - there was a lot of lessons learned, and I'm not done either.

Also, I'm in talks to get real keys made using injection molding at some point, so I don't *have* to figure out a perfect workflow ;)

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