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dynasty 200dx shuts off when trying to weld AC

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  • travis4t
    replied
    bump....

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  • travis4t
    replied
    cruizer no insight?

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  • travis4t
    replied
    bump

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  • shootist2
    replied
    My best understanding of these machines is the ac is converted back from dc after the igbts. So it's an additional circuit. Would explain why you are good on dc.

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  • travis4t
    replied
    Originally posted by cruizer View Post
    Open it up, and with a philipps screw drive tighten the screws on plastic caps on the horizontal mother board. also with the rubber/ plastic end of that screw driver tap both boards down as they tend to loosen off
    so i finally used my dynasty on ac again, and what ever i tried did not fix it, so i took off the cover to try what you said.... but to be honest i didn't see any screws on the horizontal board am i missing something?
    Attached Files

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  • travis4t
    replied
    you the man! I'm going to give it a shot next time i use it, hopefully soon. i love the machine lol.

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  • cruizer
    replied
    Open it up, and with a philipps screw drive tighten the screws on plastic caps on the horizontal mother board. also with the rubber/ plastic end of that screw driver tap both boards down as they tend to loosen off

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  • gnforge
    replied
    It's not really duty cycle as would normally happen when welding near or at limit if plugged into 220 volt with 50 amp or more available. <br />
    It's related to input. <br />
    Keep in mind if using any extension cord that will drop input and cheap or light cord is much worse. <br />
    As I said mine does that even on 220 due to my older big 40 only has 23 amp max on 220 <br />
    And it does not trip breaker at welder. <br />
    I would try on good reliable 220 volt 50 to 60 amp service supply first to narrow down and verify problem.

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  • fabricator
    replied
    May wanna check the nuts on the inside of the output studs they can become loose and cause issues.

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  • travis4t
    replied
    thank you for all the input,

    i am running it off 110,( though i literally just bought the plugs to run is off 230, which i will try next) I'm not sure that i could be reaching the duty cycle, as i tried starting an arc and keeping it at low amps to see if it would shut off and it still did, i also tried moving the ground 2" away from the joint and it still shut off. as i mentioned i did do a factory reset, but i had limited time and i only ran an couple inches of bead and it ran nice, i think I'm going to have to try it out and put it through its paces to see if that was the issue

    i had tried 2 different tungsten green and arc time tungsten

    oh also, this has happened on my household 110 with 20amp breaker as well hooked up to my trailblazer 325

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  • piniongear
    replied
    Originally posted by travis4t View Post
    well, the machine literally shuts off and turns back on, by its self, not really just stopping the arc if that makes sense
    OK, I misunderstood, as I thought it quit welding after a short time but did not come back on.

    I too own a Dynasty 200DX and weld quite a bit of aluminum.
    Some months back I started a bead and the machine quit welding after maybe 1 inch of bead.
    I restarted the arc again but it just made a light 'pop' and would not start again.
    I thought for sure I may have blown a board.

    Since my tungsten had developed quite a ball on the end I resharpened the tungsten and put it back in the torch.
    The arc started beautiful and I welded the rest of the day with it and have not had it happen again.
    I am not suggesting the tungsten has anything to do with it, but this is what I did when my arc went out, which sounds like what you are experiencing.
    I do not think the voltage has anything to do with it either because using 110V just limits you to a lower heat range and reduced duty cycle.
    I run my 200DX on 220V three phase power, and this has only happened one time to me, but it did happen.
    Maybe Cruiser has a suggestion for you on what may cause the problem. I will be waiting to hear his comments.
    pg

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  • gnforge
    replied
    If this is happening on 110 volt. <br />
    1st. Question, what amps are you welding at? <br />
    You are limited on amps with 110 input....<br />
    You will get more amps on DC but both are restricted with 110. <br />
    Next question what is powering it, generator or shop supply? And are you using extension cord and if so how big is it. <br />
    If you are welding or trying to weld higher amps than the input will handle the Dynasty will quit welding... Then after a short time will reset and you can start again. Protecting itself. <br />
    My Big 40 only puts out 3000 watts and even on 220 volt my Dynasty 200 will do the same thing if I'm trying to Tig over 150 amp AC. <br />
    Just a thought to check out. <br />
    Greg

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  • travis4t
    replied
    well, the machine literally shuts off and turns back on, by its self, not really just stopping the arc if that makes sense

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  • piniongear
    replied
    I have no technical knowledge myself, but I wonder if the problem is caused by the high frequency extinguishing after starting the weld?
    I say that because you are welding with it set to AC.
    pg

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  • travis4t
    replied
    i had just done a reset, and it did work, but i only laid down a few inches of bead. i have had this problem intermittently, but never has it not really worked at all. hopefully that was the problem. fingers crossed. maybe someone has a more technical answer then that though.

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