Is the metal ground shiny clean before welding? No mill scale?

Rich

 

Post some pics so we case what you’re doing.

 

Check the voltage at tip.
Remember the amp meters can off too. Check calibration on amp meter

Dave

 

Well, it would be nice if we knew what type of weld joint we’re talking about. I’ll assume fillet weld. If you’re getting undercut, you need either more wire or less voltage, or maybe slow down the travel speed.