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  • problem with used dynasty 200dx

    hey everyon,

    Im new here but thought maybe someone could help me i am having trouble with my tig welder. to weld ac i have to put my ground lead on the right side of my welder like normal, but when i go to weld stainless in dc i have to swap my leads over or it will melt my tungsten up into my collet.... does anyone know what i am doing wrong? Also in dc with my pedal all the way down my welder is only going to 129amps not the 200 that i have it set for.

    once again i am not the most experienced welder out there but can weld just having trouble with the setup of my machine.

    thanks

  • #2
    Download the manual, you shouldn't need to swap Dinse connections. And if you are using a WP17 torch, you shouldn't be running over 150 amperes as that is the limit. There is also a torch duty cycle.

    Output is limited if connected to 120 VAC. What is the power service connection?

    Argon? Running without it will instantly melt+burn the tungsten.

    Comment


    • #3
      Originally posted by kevinwarren240 View Post
      hey everyon,

      to weld ac i have to put my ground lead on the right side of my welder like normal, but when i go to weld stainless in dc i have to swap my leads over or it will melt my tungsten up into my collet.... does anyone know what i am doing wrong?

      thanks
      Yes, leave the dinse connector alone. The only reason you would swap the dinse connectors is to stick arc weld.

      So from AC, push extreme left button once to get DC and have at it.
      Nothing welded, Nothing gained

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      • #4
        Put the ground on the left side (when looking at the front) and leave it. I also suggest reading the manual.
        Performance Aluminum Fabrication

        Comment


        • #5
          Originally posted by travisc454 View Post
          Put the ground on the left side (when looking at the front) and leave it. I also suggest reading the manual.
          Ditto on this.
          All tig is done in this manner (on this machine) and is exactly why the Diversion is set up so newbies cannot do this.
          Read the manual before you WASTE this machine!!!

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          • #6
            Link to Manual

            Here is the link to the PDF of the manual.... simply plug in your serial# and download the manual that pertains to your version of Dynasty

            http://www.millerwelds.com/service/ownersmanuals.php

            and a link to the quick reference..... PRINT it out and keep it near the machine!!!!!

            http://www.millerwelds.com/pdf/DynastyQuickRef.pdf

            and please take some time to explore the site and read articles and free reference material... lots of good info here!!!
            Last edited by H80N; 08-20-2011, 05:00 PM. Reason: clarity
            .

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            • #7
              Originally posted by Keith_J View Post
              Download the manual, you shouldn't need to swap Dinse connections. And if you are using a WP17 torch, you shouldn't be running over 150 amperes as that is the limit. There is also a torch duty cycle.

              Output is limited if connected to 120 VAC. What is the power service connection?

              Argon? Running without it will instantly melt+burn the tungsten.

              Running straight argon, WP20 torch, Wired in 230 per the manual for single phase power.

              Comment


              • #8
                Originally posted by FusionKing View Post

                Ditto on this.
                All tig is done in this manner (on this machine) and is exactly why the Diversion is set up so newbies cannot do this.
                Read the manual before you WASTE this machine!!!

                I have read the manual and have been welding on this type of machine for 2 years just not this exact one, i appreciate all the help though

                Comment


                • #9
                  Originally posted by shovelon View Post
                  Yes, leave the dinse connector alone. The only reason you would swap the dinse connectors is to stick arc weld.

                  So from AC, push extreme left button once to get DC and have at it.
                  thank you that is how i do it and the dinse connectors still need to be swaped to get the correct output.

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                  • #10
                    are you swaping for tig? its an inverter machine you dont swap for tig. i have been welding with my 200 dx for 6 years welds grait tig torch on the right clamp on the left thats what the manual says i weld mostly on ac no probems
                    MM140 AS
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                    • #11
                      Take that machine in for service.

                      You've got a problem.
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                      • #12
                        Originally posted by SundownIII View Post
                        Take that machine in for service.

                        You've got a problem.
                        Certainly. Although you could check polarity with a volt meter after setting up for Lift Arc (so the HF won't fry the voltmeter). Any cheap Chinese voltmeter, just in case you blow it. Have an assistant look at the display.

                        Connect at the Dinse connections with fine wire. If polarity is reversed, it will show. This will rule out any other issues.

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                        • #13
                          Do you accidentally have it in stick mode? This will put you in DCEP. If the gas solenoid is kicking on and off properly as you try to weld then you aren't in stick mode.

                          Edit: or just read the lights on the control panel

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                          • #14
                            Originally posted by kevinwarren240 View Post
                            thank you that is how i do it and the dinse connectors still need to be swaped to get the correct output.
                            If you have to swap the connectors to get the right output for tig you need to send it in for service. Something is wrong.
                            Nothing welded, Nothing gained

                            Miller Dynasty700DX
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                            2 ea. Bridgeport
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                            6 foot x 12 foot Mojave granite

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                            • #15
                              What everyone is alluding to is exactly this -
                              For DC TIG, you want the electrode to be negative - that means the electrons will jump from the tungsten to the work piece and heat the work piece (mostly).

                              If you have the polarity reversed, the electrons will go from the work piece to the tungsten and heat (or rather overheat) the tungsten and it will melt away.

                              So for welding, "EP" - electrode positive, "EN" - electrode negative. And since electrons are negatively charged, and opposites attract, you want the electrode negative (excessive electrons) and the work grounded (less electrons).

                              On that machine, when you select AC, the machine assumes the work clamp (i.e. the 'ground') is still in the same connector. The machine alters the polarity for you. That's why they call it "AC" or "Alternating Current". If you swap the cables, the balance control will be off.

                              So, the reason tungsten melts away - 1) too much power. 2) wrong polarity (and thus too much power) or 3) no shielding gas and it oxidizes away.

                              FYI
                              Some have alluded to the fact that when stick welding you might want to swap the connectors. This is because some (most?) stick welding fillers run smoother on DC and more importantly, DC + (the '+' means EP or "Electrode Positive" which is opposite of what you want for TIG).

                              I believe (double check your manual) that the newer Dynasty 200s don't require swapping for stick welding! The older ones did.
                              So - for TIG, don't swap cables. If you think you _must_, you are doing something fundamentally wrong (hence everyone suggesting you read or re-read the manual). We are trying to be helpful not hostile.

                              If you still think we are all full of it, then by all means head to the repair shop and get another opinion. Sometimes a hands on demonstration is the most efficient way of getting around an impasse.
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