Speakerguy
Active Member
I got hit for the last time today. It was weird. I was making a PID controller for a constant voltage supply (30kV @ 1mA) (note that I have no idea how this supply works internally, but they wanted me to try and make an analog PID anyway). I had it up and running and was doing the initial P tweaking but I was getting zero voltage out of the thing, no matter what gain settings I tried (no I or D at this point). Then as I'm trimming one pot up (slowly) there was like this flash, not visible but felt, like static had hit both my forearms and face like a static discharge. The scope went out and I threw the power switch off.
I'm never doing anymore damn high voltage work for this company. No matter how many safety precautions I/we take something always happens. This was inside a box with the low voltage analog ckt well away from the HV load side, and somehow static must have built up somewhere. The supply must have gone unstable in the blink of an eye or something, but no way I'm [deleted by moderator] with a 30kV supply in a control loop that I don't know how it's going to react.
I'm never doing anymore damn high voltage work for this company. No matter how many safety precautions I/we take something always happens. This was inside a box with the low voltage analog ckt well away from the HV load side, and somehow static must have built up somewhere. The supply must have gone unstable in the blink of an eye or something, but no way I'm [deleted by moderator] with a 30kV supply in a control loop that I don't know how it's going to react.
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