Crossfire XR Z axis lifting during cut then shut off

[ChelanJim]

You might take a look at this post from Langmuir:

Torch height problem NEW*

Have you updated your THC firmware in the last 12 months or so? We patched some code in the updated firmware that used to command the torch to rise 0.060" anytime the IHS alarm was triggered. This feature was intended to prevent the torch from dragging but ended up creating more issues than it solved. If you haven’t updated recently you should give that a shot. That said, if that actually resolves the issue, you should check your IHS switch for grounding, most commonly between the top half and t…

Another thing to do is watch FireControl and see if the IHS light turns green just prior to it lifting. There could be a break in the wire that is separating exactly when the torch is in that area of the table. It would be interesting to rotate the cut 90 degrees and see if it still happens at the same, relative spot.

Otherwise I would say there is something going wrong in the THC. You said you tried cutting without IHS but did you try it without THC? I would try that.