Ok, admittedly, I apparently either got rusty or toasted something in my machine (super 200P). I used the snot out of it for plasma cutting when I scrapped an old Mack yarder and I am not sure, but I might have fried something internally. There are no lights on indicating a problem. I hooked up my tig torch the other day and I cant seem to get it dialed in for welding aluminum. I am welding 1/8 give or take, aluminum stock with 2% thoriated 3/32 tungsten, straight argon, elecrode negative, A/C current. Everything seems very erratic, when I use torch trigger on stable setting I weld a couple of inches and the amps go through the roof and blows out. I actually used up all my argon before I tried the pedal control.( I have a tendancy to get blinders on when confronted with a problem and used up all my gas trying to figure out why it wouldnt weld right with the torch control. Can someone lay on me "ALL" of the basic settings for welding aluminum with a super 200P, so I can see if I am crazy or not! Much appreciatd...COop