Maybe the VIM or the THC board is somehow losing a little bit of voltage signal along the way causing the torch to rise.
You might have to start a service ticket with langmuir.
Have you ohm tested the USB connection in the back of the electronics enclosure to ground.
And we’ve totally ruled out that it’s not a solenoid or regulator issue?
This isn’t some kind of air starvation issue?
Had the same issue a while back. It wound up being a grounding issue. I attached a jumper between the work ground (attached to the slats) and the work piece. Completely solved the problem. I’m running a Powermax 45 XP with fine cut consumables. I cut a lot of small parts with 10 or more pierces in 18G stainless. with 32-36 parts out of a 2’ x 2’ sheet. Lots of crud builds up on the slats that messes with grounding.
The most recent cut where I applied all of the tips y’all provided was on 120PSI, the updated torch height of .125”, and grounding directly to the work piece, and cutting the furthest part from the ground and working towards it. The torch began to rise while it had already penetrated and was making a satisfactory cut.
Success, I tried a different computer running FireControl, and it was flawless. Thank you everyone, for your input. The cut quality in the batch was exceptional with the changes made.
so it was a noise issue from the computer?
Yes, it probably had something to do with a USB extension from the original USB to the computer in question.