Just a quick thought. I'm sure you checked - BUT! you do have the polarity right ? those little sets tend to have easy change over faciltiy for flux core wire - it's kinda easy to overlook when in a hurry. I am not using flux core wire I am running with argon and I started with norm polarity and th...

thanks yall...I am using .030 wire with a .035 tip I do know I can get a spool gun for around 220 bucks and I forgot about the preheating fact (duhhh) ...we acid washed the floor first and then I use windex and a stainless steel brush ..I use to do all the welding anf fab at a trailer sales and serv...

I have done aluminum with a 220 unit with spool gun ...but at home I have a millermatic 110 I bought the argon alum wire and now liner for my stinger went to weld some holes that are starting in the floor of the horse trailer but I cant seam to get penetration ..it just seams to ball up and I can kn...