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Miller Dynasty 200dx. 110 home outlet?

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  • #16
    You can start by describing exactly how you wired your adapter cord, preferably with pictures. I know electricians I wouldn't trust to make adapter cords because it's not as easy as it looks.

    Do you have a voltage meter and know how to use it safely? What voltage combinations do you get from the cord you made?

    Where did you get the Dynasty and was it working just fine before you attempted this?


    • #17
      Wiring adapters can be bad if you don’t know which wire does what. A friend of mine figured wiring a 230v cord with a regular old 115v plug on it and since his machine was dual voltage it would be fine. It was fine, for about 5 seconds before it went POP and a little puff of smoke came out.

      Sounds like you might have done the same thing. Open it up and look for something obviously chooched.


      • #18
        Originally posted by Hose A View Post
        I'm pretty sure that I wired a 4 prong cord incorrectly to the 3 prong cord so I could use a Miller dynasty 200 at home the machine worked for a while then we heard a pop sound and now it won't even turn on. Can anyone recommend where to start the troubleshooting process?
        How did you have it wired and how long is "for a while?" What were you doing when it popped (machine idle, maxing it out, ?). First thing after waiting long enough for the capacitors to discharge is taking the cover off and taking some pictures to post here if taking it to a Miller tech is not an option (that would be my first recommendation if you don't have the tools or time to troubleshoot electronics having ~1000V DC across them). I just did a write up on fixing three of these welders.


        • #19
          First of all thanks for the responses that were given. I am 55 years of age and been working most of my lifetime with heavy truck repairs. my older brother however is the guy I turn to for metal fab and welding. The machine was purchased from a second hand consignment shop and worked good for him for at least 6to8 months prior to moving it to my home. His machine was wired for 4 prong safety locking power cord which was unavailable at my location so I removed cord end and put 3 blade 220 volt end in its place cutting red wire and using black and white as two power leads with the green as ground pin. The unit started and ran normally for 30 maybe 45 minutes and nothing was noticed different in operation by him until the machine shut off. We heard a loud pop sound right about the same time but honestly either one of us could say for sure that the machine made that noise. anyway it stopped running and after putting cord back to way it was still wont even turn on. I removed the cover again and checked the breakers for continuity and they appeared to be closed that's as far as I went so far


          • #20
            Looks like you have the colors used properly. It appears to have been used on 3-phase power in its last location, which is when the red wire is used.

            Verify input voltage first. Does the outlet power anything else? Have you tried the welder in another outlet that works?

            Verify voltage at the premises outlet, and then again on the other side of your adapter cord.


            • #21
              Very first welder I ever got I wired it properly by the colors. Problem was whoever had it before me didn’t believe the wire color was important. Once I got the green back to being green and not hot, she chooched along just fine. Fortunately it was an old transformer buzz box and nothing let the smoke out.


              • #22
                When the machine shut off (it shut itself off?) did it reset either the power switch or the circuit breaker? When you say you put it back the way it was, did you try it again on the power source your brother used? If he had it on three phase, single phase puts a bit more stress on the input circuit. If you can take some pictures of the inside, we could probably help out a bit more. A picture of the back left (looking at the panel from the front) of the power cord input connections help make sure those are right for single phase. A picture of the top of the two big buss capacitors (2" diameter, 3" tall cylinders) tells whether or not they were overheating. A picture of the front of the top board, just in front of the buss capacitors, there is a component on a heat sink and a resistor just next to it that has gone out for some folks.