What is the correct amperage for this type of wire? and also I was told to use pure argon. I am currently using 98/2. I was told by omeone else that Argon would make the problem worse because argon burns much hotter than 98/2. To me it seems 98/2 would be hotter because of the oxygen. I don't know. My problem is I keep burning up tips 5minutes of weld time and stop and change tips. I have tried loosenig the tension on my feed rollers and tightening the rollers. I have tried over sized tips, nothing seems to help. does anyone have any suggestions?