Iv had this issue on my XR before and it turned out the one of the limit switches were back feeding and creating sporadic live voltage when nothing was cutting. Disconnected those and it reads zero resting.
Now my Pro is doing it (no limit switches). I spent an hour on the phone with tech. I even hooked up my other Pro control box and it will still show live voltage at 19-32v (it changes). Odd thing is. If I unhook the plasma ground it goes to zero (plasma not even turned on, no power). If I unhook the IHS cable, it will go to zero. I notice while cutting, soon as the torch stands off on metal, reading goes to zero. After it lifts up, I get voltage when its not cutting.
I have always ran all my machines with 0 on live voltage when its not cutting. I have ran this specific machine, programs, HYP XP45 many times, no issues. But now this crept up. I aim to unplug each motor and see if one of those aren’t back feeding. I thought for sure switching the control box out would prove something.
While on phone with tech, right bf we got off the line, I hooked IHS cable back in and got a zero reading. Cut the next day for a couple hours and all the sudden I get live voltage on idle.
If I unhook the ground clamp on plasma, no matter if its on or off, that will get me to zero. IHS cable unhooked gets me to zero. I even tried a brand new VIM box, not difference.
I also noticed today, when I powered off the control box, my FC was still lit up, I could hit buttons, I reset my pierces. ON all the FC stuff it always would turn grey and be inactive once the control box was powered off. I found that very odd. Im running latest firmware and FC.
When live voltage is too high it starts acting up things. I can get by with this, but something is def off.
Any help would be appreciated. thanks