Quote Originally Posted by EmptyNester View Post
Was the kerf it was crossing part of that G-code file? If so, a "smart" processor could know the torch is crossing a kerf and accelerate it (while possible to do, I'd be surprised if there was non-commercial software that did that).

To see if it is noise related, do the same cut with the torch off and see if you get the same jump. If you do, you can rule out noise from the torch.
Wasn't a kerf jump, it was one of the jumps that made me go "Whoops, that isn't right". Imagine that we cut a 4" circle starting on the left side. The second circle test was cut 2" more left (by mistake) also starting left. As soon as it hit the empty space from the 1st circle it did a rapid move, in X only, about 4-5 times faster than we had rapids set for.

Couldn't see how it was anything other than interference when the torch entered HF mode to try to keep the torch lit. But I'm open to ideas.