Mach 3 locking up issues anyone?

[TinWhisperer]

Razorweld Cut Chart

I’m using a ViperCut 30i with the newer J45XC torch. I just piddle to relax and make things for friends, so I am no expert by any sense of the imagination. I am trying to cut some letters from 1/4 inch mild steel. I’ve got cutter set at 30 amps and running at 15 inch per minute. My problem is that I get a LOT of what I call slag stuck to the back of the sheet that has to be ground off to get the pieces out. Is there something that I can do to get a cleaner cut? Any tips would be appreciate…

ViperCut 30i with the newer J45XC torch