Thread: VFD interference problem
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06-03-2016 #6
Alright, so after spending the day trying to fix this with Graeme on Skype, we seem to have found the source of the problem.
I have connected all screens to the star point. I've taken the VFD out of the box, power is separate, it's completely diconnected from the control box, and still, no improvements.
Turns out disconnecting the PC solves the issue. So it seems like there is a grounding problem with the BOB. As JAZZ said, it's a cheap chinese BOB, so I might have to change it.
Fiber glass cabinet. Fireproof plate in the back. No metal.
Jee JAZZ, you don't like them.. :D !
Nope, not intentionally, but apparently it is through the BOB.
One thing to note. When there is no power to the control cabinet, but the PC is plugged and turned on, the BOB receives 5V, but the 5VDC PSU led turns on, apparently because it receives power through the BOB ! Weird...
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