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New to me XMT300 CC/CV is there a part missing?

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  • New to me XMT300 CC/CV is there a part missing?

    Hi All New here,

    I just got this XMT300 CC/CV Auto link and decided to check inside before powering up since it has a mysterious past. Nice and clean for it's age with no signs of hands being in there, dust is undisturbed in all the right areas. Some case screws were loose which got me worried as this was a good deal untested. My question is, is there something missing in the picture? There is a 10 pin connector waving in the breeze and 4 stand offs with "LOOSE NUTS" right next to it. Maybe something from the CC model? Seems like a good deal so far, hope I'm right. Just being careful so I don't kill it on start up. Thanks for any and all help.

    Rich.
    Attached Files

  • #2
    sadly it seems so. check the pics there. http://www.millerwelds.com/resources...CC-CV-problems

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    • #3
      Originally posted by snowbird View Post
      sadly it seems so. check the pics there. http://www.millerwelds.com/resources...CC-CV-problems
      Thanks. Uggh what was that?

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      • #4
        Your missing the precharge / regulator board. In all likely hood, the unit is blown. Parts are obsolete as well, being such an old machine. Don't waste your time on this one, as even if it was fixed and running, it isn't worth much

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        • #5
          Driver card #168777 just found that. Wasn't such a good deal after all. Thanks snowbird.

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          • #6
            Originally posted by cruizer View Post
            Your missing the precharge / regulator board. In all likely hood, the unit is blown. Parts are obsolete as well, being such an old machine. Don't waste your time on this one, as even if it was fixed and running, it isn't worth much
            Thanks cruizer. That is one expensive boat anchor I have there. I should have known better.
            Last edited by Craftsmanatlarge; 11-18-2014, 03:49 PM.

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            • #7
              Would this power up at all with that board missing???

              Originally posted by cruizer View Post
              Your missing the precharge / regulator board. In all likely hood, the unit is blown. Parts are obsolete as well, being such an old machine. Don't waste your time on this one, as even if it was fixed and running, it isn't worth much
              Seller claims it powered up and the voltage display changed while turning the dial. That led me to believe it would work. Just curious. I traced the schematic and found that the A1/A2 coil wires of the W1 and W2 contactors go to this board...so no coil power no control power right? Or am I missing something?ThanksRich

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              • #8
                that board is on ebay....$143 new..

                Originally posted by Craftsmanatlarge View Post
                Seller claims it powered up and the voltage display changed while turning the dial. That led me to believe it would work. Just curious. I traced the schematic and found that the A1/A2 coil wires of the W1 and W2 contactors go to this board...so no coil power no control power right? Or am I missing something?ThanksRich
                http://www.ebay.com/itm/Miller-Welde...-/400738328673
                Board is on ebay auction ends in 10hrs. It is a buy it now. Do u gamble? Might fix it might not.
                Kevin
                Lincoln ranger 305g x2
                Ln25
                Miller spectrum 625
                Miller 30a spoolgun
                Wc115a
                Lincoln 210mp
                F550 imt service truck

                Comment


                • #9
                  Originally posted by Tryagn5 View Post
                  http://www.ebay.com/itm/Miller-Welde...-/400738328673Board is on ebay auction ends in 10hrs. It is a buy it now. Do u gamble? Might fix it might not.Kevin
                  Thanks Kevin. Saw that last night and am still thinking what to do. This gamble already hurts a little. Not sure but thanks a lot. I appreciate your effort.Rich.

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                  • #10
                    At least the ebay item is returnable ... not sure whether it would be ruined if you installed it and it didn't work ... seems like it might be worth taking a chance?

                    Comment


                    • #11
                      The XMT 300 is kinda a experimental unit, a update of a powcon in a Miller package. As a tech, I'm afraid of them and even after going through a preinspection check list. I stand far away at a disconnect before I turn them on. Not too much stuff I'm afraid of, but the early XMT300 is one of them.

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                      • #12
                        why?

                        Originally posted by cruizer View Post
                        The XMT 300 is kinda a experimental unit, a update of a powcon in a Miller package. As a tech, I'm afraid of them and even after going through a preinspection check list. I stand far away at a disconnect before I turn them on. Not too much stuff I'm afraid of, but the early XMT300 is one of them.
                        Do they explode, or catch fire? Curious to what they do. I knew they were a powcon welder, i believe powcon was the first to dive into the inverter style machines. I have used them before and they welded nice.
                        Kevin
                        Lincoln ranger 305g x2
                        Ln25
                        Miller spectrum 625
                        Miller 30a spoolgun
                        Wc115a
                        Lincoln 210mp
                        F550 imt service truck

                        Comment


                        • #13
                          Cause the bottom ends like to explode. This tends to take the power out to the building. So I run them on a fast saftey over amp circuit. The early ones like this one, seemed to be put together with alot of redundant go nowhere circuits.

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                          • #14
                            Originally posted by Tryagn5 View Post
                            Do they explode, or catch fire? Curious to what they do. I knew they were a powcon welder, i believe powcon was the first to dive into the inverter style machines. I have used them before and they welded nice.Kevin
                            Hi KevinI owned 2 powcons a 300ST and a 300 MST, loved them welded great but they both developed problems over time and sold them both at the advice of the LWS. Bought this XMT300 thinking they were better machines because they were newer and they were Miller. I never checked up on the history of them. I need to sleep on this one for a while, still afraid to power it up. Especially when someone with the knowledge and experience cruizer has says stay away from something called a "Popcorn Machine". I get it now for sure. I passed on the pre-charge board on ebay from a previous post since I seem to have wasted enough money on this.Rich

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                            • #15
                              great......

                              Originally posted by cruizer View Post
                              Cause the bottom ends like to explode. This tends to take the power out to the building. So I run them on a fast saftey over amp circuit. The early ones like this one, seemed to be put together with alot of redundant go nowhere circuits.
                              You had to tell me that they like to blow up, now im going to need to get one and see how much smoke comes out.
                              Kevin
                              Lincoln ranger 305g x2
                              Ln25
                              Miller spectrum 625
                              Miller 30a spoolgun
                              Wc115a
                              Lincoln 210mp
                              F550 imt service truck

                              Comment

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