Hi there,
I've got a question about oxy-fuel (specifically acetylene) cutting circular shapes on reasonably heavy plate (1.5" - 2.5"). I've noticed that when cutting profiles out of this size of plate, the cuts are great when moving in a straight line, but as soon as the torch gets a little ways into curve, the cut will start to flare out a bit at the bottom half of the plate, or the cut will become convex. It seems to me that the travel speed is too high, but the quality of the straight cuts prior to the curve are great. Any input on this would be very much appreciated. For 1.5" plate I use a #2 tip, oxy psi is about 33, fuel gas psi is at about 5. A lot of the pieces we make are quick attach ears for heavy equipment out of QT-100 plate, being that this stuff is so expensive I would like to be able to improve cut quality without practicing if you know what I mean.
edit: the cut will become concave, not convex.