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Thread: Multimaster 260 Mig torch always hot

  1. #1
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    Multimaster 260 Mig torch always hot

    I just picked up a MM 260, three of them acutally. The one that is in the best shape has a problem of the wire always being energized.
    Where would I begin to look to cure this issue?
    Thanks
    Jeff

  2. #2
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    Re: Multimaster 260 Mig torch always hot

    Contactor stuck?
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  3. #3
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    Re: Multimaster 260 Mig torch always hot

    Quote Originally Posted by Jhaywood75 View Post
    I just picked up a MM 260, three of them acutally. The one that is in the best shape has a problem of the wire always being energized.
    Where would I begin to look to cure this issue?
    Thanks
    Jeff
    Is it only the one mig gun? If so I would check the switch and switch wiring. Shorts inside the gun lead are pretty common.

  4. #4
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    Re: Multimaster 260 Mig torch always hot

    Extending on what MJD is asking. Is the wire feeding while the wire is hot or not? If wire is not feeding then I find it unlikely that the gun has a short. Have you tried switching guns around?
    Lincoln, ESAB, Thermal Dynamics, Victor, Miller, Dewalt, Makita, Kalamzoo. Hand tools, power tools, welding and cutting tools.

  5. #5
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    Re: Multimaster 260 Mig torch always hot

    I only have the one gun so swapping is not an option. The wire feeds fine and is hot with trigger on and off. I looked through the guts and see nothing obvious.
    Is the contactor what Esab calls the transistor? The widget with copper bars and large capacitors? Nothing in the part diagrams lists a contactor by name.
    Admittedly, I have never worked on a welder. One of the few things that I have not had the chance or need to fix yet
    The other machine has a duty cycle issue, and the third is totally unknown regarding its problems.

  6. #6
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    Re: Multimaster 260 Mig torch always hot

    A contactor could also be called a relay. Basically a heavy duty switch that is controlled by a smaller switch in a different location

  7. #7
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    Re: Multimaster 260 Mig torch always hot

    All fixed. The mig tig stick switch was bad. Basically it was energizing the wire like an electrode no matter what position the switch was in.

    Thanks guys!

  8. #8
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    Re: Multimaster 260 Mig torch always hot

    Good to hear it's working.

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