I have a Miller Deltaweld 302 with a basic S-22A wire feeder. No burn back adjustment. I am trying to find out how to adjust the burn back in the welder. The welder is being used on an automatic table to tack and weld torque converters. It will stick at the end of the weld and I have to hit the tack button to burn the wire off. Any help will be greatly appreciated. Thank you, Rich