Millermatic 250X - Volts Climb When Welding
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  1. #1
    Join Date
    Oct 2007
    Location
    San Antonio
    Posts
    317

    Millermatic 250X - Volts Climb When Welding

    Greetings all,
    I was practically given a Millermatic 250X. Did a job for someone and got this in the process. Condition was reported as unknown.
    It has the digital readout.
    I wired it up. 220 single phase, made sure the little jumper tabs were set for 220.
    I set the volts to somewhere around 14 and the wire speed around 150
    I didn't have a gun for it so I put a meter across the terminals in the case and jumped the mig gun terminals.
    The feed rollers spun and the meter jumped to 35 volts. The digital readout jumped up to 35 volts too.
    When I finally got a mig gun and some wire I tried welding with it.
    Set the dials to around 17 and 220 to test it.
    The volts jumped to 30 when welding and stayed there. The arc was loud and sounded like a jet. Didn't sound like frying bacon at all.
    It was way too hot.
    Anyone had a welder with the same symptoms? Any good troubleshooting guides out there?
    http://www.facebook.com/groups/sa200welders
    Current machines:
    Hobart G600 Powered by 1967 Chrysler LH-318 (Project)
    Hobart GF-250(Traded)
    68 Redface
    81 Blackface

  2. #2
    Join Date
    Oct 2007
    Location
    San Antonio
    Posts
    317

    Re: Millermatic 250X - Volts Climb When Welding

    I'm just going to send the board for repair.
    http://www.facebook.com/groups/sa200welders
    Current machines:
    Hobart G600 Powered by 1967 Chrysler LH-318 (Project)
    Hobart GF-250(Traded)
    68 Redface
    81 Blackface

  3. #3
    Join Date
    Aug 2006
    Location
    MASS.
    Posts
    1,066

    Re: Millermatic 250X - Volts Climb When Welding

    mine has been acting weird lately,will keep you posted if I figure it out.

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