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1. minute (mntmn@mastodon.social)'s status on Wednesday, 20-Mar-2024 03:53:11 JST minute

   today while fixing some MNT Reform Camera PCBs that didn't pass QA i encountered something i hadn't before: the via you can see in the middle of the photos has a drill hole which is offset to the north. this faulty via then connects two traces in the inner layers of the board, shorting them.

   • minute (mntmn@mastodon.social)'s status on Wednesday, 20-Mar-2024 04:05:18 JST minute

     in reply to

     • Graham Sutherland / Polynomial

     @gsuberland on other PCBs it's OK

   • Graham Sutherland / Polynomial (gsuberland@chaos.social)'s status on Wednesday, 20-Mar-2024 04:05:20 JST Graham Sutherland / Polynomial

     in reply to

     @mntmn the alignment on that one to the north isn't great either, but that's a surprising level of error for a single misalignment.

     if you check other boards, are they correct, or are they also offset and just happen not to be shorting?

   • minute (mntmn@mastodon.social)'s status on Wednesday, 20-Mar-2024 06:35:11 JST minute

     in reply to

     • Martin

     @oniondarkmatter yeah, no idea why they didn't catch it

   • Martin (oniondarkmatter@mastodontech.de)'s status on Wednesday, 20-Mar-2024 06:35:13 JST Martin

     in reply to

     @mntmn Did they cut cost on the e-test of the PCBs? The AOI should have detected that as well.