I have a controlled automation plasmax table with a hypertherm HPR260 and command THC. My problem is that occasionally my torch lifter is behaving like a sewing machine, that is to say that it is bobbing up and down as makes it's cut. It is very difficult to find a problem because the problem may happen 2 or 3 times then it will cut normally. It tends to happen on 1/2" steel. I am hoping someone might have some suggestions as to what may cause this to happen. Thanks!
Greg