bigclive
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Unusual circuit for monitoring roller pressure
🕑 Added 2023-12-18 12:51:32 +0000 UTCThis is one of those videos that will almost certainly get very low views because it is incredibly niche and will only appeal to a small audience.
It's a custom PCB specific to a PCB panel cleaning machine where scotchbrite rollers remove oxides from the copper layer prior to photoresist being applied.
Comments
Gordo
This circuit reminds me of an RF power/SWR meter which has this sort of bridge configuration..
Big Clive
I think the panel pot may be locked and just for adjustments by the maintenance guy.
Mike Page
Am I getting this right? The 1k pot is factory or service set, and the 5k is day to day - presumably as the brillo wears down. I love the transformer used in reverse. I cannot work out what exactly the board is doing other than comparing one voltage to another; but current also figures given the numbers. I wouldn't like to bet on those transformers surviving a drop - especially not on a single sided board.
