I have a few questions, the first one would be are you using an Automatic Torch Height Control with this system? If so, what does the motion of the torch do once it has extinguished the flame. Does it gradually step up to the top of the slide and bounce off the top while the machine continues X-Y motions? Or does it in one smooth motion move to the top and stay there idle while the machine continues X-Y motions?
Also does the plasma cutter display any error lights when the torch shuts off, indicating possibly a lack of air warning or duty cycling issue?