Balzers PVD machines

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Hi everyone

I was wondering if anybody here has experience using balzers PVD machines / has knowledge about them. I have 3 machines at my workplace, BA 510, BA 360 and BA 350. They are all very old machines that have been "retrofitted" over the years. It's very fascinating to work on those but at the same time it will pretty much give you a migraine when you try to figure out stuff especially if modifications weren't properly documented over the years...

I would be interested to hear your experience / knowledge on the matter