Question about ampere on a MIG welder

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Yo!A week ago I bought a regular arc welder with the capacity of 160 ampere, pretty neat.But I find it kind of difficult to weld, I know I have to practise, but that's not my point.You see, I thought of maybe buy a MIG welder instead, but I don't really know how many ampere I need for my steel tubes.The tubes I'm using are about 2,5 - 3 mm thick, and around 70 - 80 ampere on my arc welder do very good on these. And I've been looking around for a MIG welder, and have found one that I think suits me:MIG/MAG30A/15V - 110A/18VI2: 40A 70AU2: 16V 17VI:~50/60 HzU1: 220VI1: 5A 12,5ASo my question is simple; do you think it will do the job?Also, what are the maximum ampere on this thing? Is it 70A or 110A ? I don't get it...And btw, it is with flux core, if that makes any significant difference...Last edited by pjuke; 06-30-2009 at 03:15 PM.
Reply:It will do the job. You can change from 70 to 110 at will, according to the job to be done.  JGSMAW,GMAW,FCAW,GTAW,SAW,PAC/PAW/OFCand Shielding Gases.  There all here. :
Reply:It would have been easier to answer if you had actually told us the make and model.Guessing based on what you did tell us, it probably has a 110A maximum output (I2) but is rated at 40A and 70A for its voltage curves and duty cycle ratings.  So while it draws 12.5A input at 70A output, it will draw proportionately more at 110A output, and have a shorter duty cycle.Please put your location in your profile.  Looks like you are outside the US, so not only are we nosy, but it can help with knowing what's available to you and all kinds of stuff.You will find 1/8" material much easier with a MIG/MAG unit, even if you are only going to use the FCAW process.