Considering a new miller multimatic 255

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I'll be primarily doing mig but and maybe stick/tig once in a while. Frankly any machine has to be better for the last two modes than the AHP tig machine I started with, so that's not a huge concern.Anyone know of any problems with the multimatic 255 so far? It is a new machine. I've no idea how miller good miller is at handling customer support.
Reply:I’ve always had good customer support from Miller.

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Reply:Miller has been 100% satisfaction in my experience. Most of my problems have been operator error, still they are there for me.An optimist is usually wrong, and when the unexpected happens is unprepared. A pessimist is usually right, when wrong, is delighted, and well prepared.
Reply:I love mine. I have not TIG'ed with it yet, but it is a BANG UP stick welder. I love the pulse MIG. Pulse MIG does take some getting used to. You have to hold a longer contact tip to work distance and it works much better if you do a straight push or drag, with no manipulation. I find the synergic settings work pretty well on both short circuit MIG and pulse MIG. I am using 90/10 gas exclusively. My biggest problem is that with 0.045 hard wire, I can't seem to tighten the drive rollers tight enough. I suspect the problem is the roller itself. I haven't had this problem on 0.030 or o.035 wire. That being said, pulse MIG seems to work best on 0.045 wire. You might find that getting 90/10 gas in anything other than a 330 cu ft cylinder is difficult if not impossible. at least around here I couldn't get it in any other size. I will likely change out the gun for a Bernard BtB gun. There's nothing wrong with the stock gun, but the Bernard feels a little better in the hand to me, and I am in love with center fire consumables.Miller Multimatic 255
Reply:Also if you are replacing an AHP, be aware that the MM 255 is a DC TIG welder only. You cannot use this machine to AC TIG weld aluminum.Miller Multimatic 255
Reply:

Originally Posted by Louie1961

I love mine. I have not TIG'ed with it yet, but it is a BANG UP stick welder. I love the pulse MIG. Pulse MIG does take some getting used to. You have to hold a longer contact tip to work distance and it works much better if you do a straight push or drag, with no manipulation. I find the synergic settings work pretty well on both short circuit MIG and pulse MIG. I am using 90/10 gas exclusively. My biggest problem is that with 0.045 hard wire, I can't seem to tighten the drive rollers tight enough. I suspect the problem is the roller itself. I haven't had this problem on 0.030 or o.035 wire. That being said, pulse MIG seems to work best on 0.045 wire. You might find that getting 90/10 gas in anything other than a 330 cu ft cylinder is difficult if not impossible. at least around here I couldn't get it in any other size. I will likely change out the gun for a Bernard BtB gun. There's nothing wrong with the stock gun, but the Bernard feels a little better in the hand to me, and I am in love with center fire consumables.
Reply:My machine is over a year old now so I need to pull the liner and inspect it. The problem may lie there.Miller Multimatic 255
Reply:I know, I found myself only doing DC welds anyway which is another reason why i say anything has to be better than that box. :PI did not find it to be satisfactory doing stick welding, I got a lot of spare stick to use so i'm looking forward to finding a better alternative.Last edited by XMilitary; 14 Hours Ago at 12:52 PM.
Reply:I have heard you if run x number of rolls through it or if it's older than a year or two the liner needs to be swapped.
Reply:I was actually wondering what the best gun for it was, I saw miller has MDX consumables and S-lock consumables for their MDX guns but I don't know anything about either of them (or what the difference with one over the other is).
Reply:

Originally Posted by XMilitary

I was actually wondering what the best gun for it was, I saw miller has MDX consumables and S-lock consumables for their MDX guns but I don't know anything about either of them (or what the difference with one over the other is).
Reply:Memory isn't good. Miller equipped their machines with a gun they bought from some better known company in and around 2010 when I bought the 252. It is labeled Miller M25.Later machines I feel had a Bernard gun. When I first tried dual shield I burned down my original M25 gun. I then bought a 400 amp Bernard gun. It is robust to say the least! I rebuilt the M25 & use it most of the timeBernard parts mostly have part numbers, but I was disappointed that I can't look up a gun & see a parts list.An optimist is usually wrong, and when the unexpected happens is unprepared. A pessimist is usually right, when wrong, is delighted, and well prepared.