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Miller Dimension 1000 issues

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  • Miller Dimension 1000 issues

    I need some advice on how to efficiently setup my Dimension 1000 3 phase unit when i only have single phase available in my shop?

  • #2
    Dave, that's a three-phase SCR phase-control machine, which means it will be very difficult to run without a rotary phase converter, and it will take some experimenting to work well that way. It's best to search rotary phase converter for three phase welders on practical machinist. More experience with that over there.

    You may come across a Haas-Kamp conversion, but I would not recommend trying it with your machine. I have performed a Haas-Kamp conversion on older three phase welders with the cranks/brushes (Thermal Arc had some old single/three phase plasma cutters that worked the same way, but they only worked at one amperage), but people who have tried it with the SCR phase-control based three phase machines couldn't get the welder's to operate over a large operating range.

    Hope this helps,


    • #3
      You might need to get a smaller welder or a bigger shop... That's a lot of welder. You'll need a rather large rotary converter to generate 3-phase for it, and if you have to buy new, it might end up costing more than a welder with single-phase input. If you're not actually using the full capabilities of that machine, something like a XMT350 might serve you better. If you actually are getting that machine hot, you might call your local power company and ask what it'd cost to have 3-phase installed. It might be fairly cheap if you're in town with 3-phase a couple poles away, or it might be quite prohibitive if you're out in the woods.

      If you've never used this machine, and just bought it because it was suspiciously cheap... now you know why...


      • #4
        3ph power is about three or four poles from my shop, the electrical utility quoted me $15k to bring one more run and a transformer to me. I can literally see it from the front of my shop. It’s not just the additional wire, but that transformer is expensive.


        • #5
          That's about the same cost as a rotary converter that'll run a 73KVA scr-chopped load...


          • #6
            So may as well get main power brought down then.