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Dialarc HF problems

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  • Dialarc HF problems

    Hey all,

    I have a Miller Dialarc HF Serial # - JG118889 that I am having some problems with.

    We switched the machine over to just a momentary switch for TIG welding. We have been using a switch from Weldcraft, however we keep burning them up and going through them about ever 2-3 months.

    I've gone through and replaced all the wiring from the receptacle to the switch itself and have installed a new switch....today while in the middle of welding it just cut out and the switch will not control anything.

    When the welder is in remote amperage setting and remote connector is off we can get an arc started...but with the remote connector switch on we don't get anything.

    Any suggestions on a momentary switch or options would be much appreciated.

    Thanks

    Jason

  • #2
    Originally posted by dieseljunky View Post
    Hey all,

    I have a Miller Dialarc HF Serial # - JG118889 that I am having some problems with.

    We switched the machine over to just a momentary switch for TIG welding. We have been using a switch from Weldcraft, however we keep burning them up and going through them about ever 2-3 months.

    I've gone through and replaced all the wiring from the receptacle to the switch itself and have installed a new switch....today while in the middle of welding it just cut out and the switch will not control anything.

    When the welder is in remote amperage setting and remote connector is off we can get an arc started...but with the remote connector switch on we don't get anything.

    Any suggestions on a momentary switch or options would be much appreciated.

    Thanks

    Jason
    On your Dialarc HF the remote switch carries the full load of controlling the 30 volts to the magnetic amplifier... and has no solid state control circuitry like more modern machines... they went brute force direct control.. that is all they had available at the time

    so I am surprised that your switches are lasting as long as they are...

    here is a link to your manual..

    http://www.millerwelds.com/om/o315m_mil.pdf

    for durability... I would guess a switch rated for at least 10 amps would live longer

    the factory pedal for that would be one of the RFC23 variants..

    here is a manual

    http://www.millerwelds.com/om/o826d_mil.pdf

    the "limit switches" specified are for 10 & 15 amps...

    hope this helps
    Last edited by H80N; 12-13-2013, 10:04 AM.

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    • #3
      Originally posted by H80N View Post
      On your Dialarc HF the remote switch carries the full load of controlling the 30 volts to the magnetic amplifier... and has no solid state control circuitry like more modern machines... they went brute force direct control.. that is all they had available at the time

      so I am surprised that your switches are lasting as long as they are...

      here is a link to your manual..

      http://www.millerwelds.com/om/o315m_mil.pdf

      for durability... I would guess a switch rated for at least 10 amps would live longer

      the factory pedal for that would be one of the RFC23 variants..

      here is a manual

      http://www.millerwelds.com/om/o826d_mil.pdf

      the "limit switches" specified are for 10 & 15 amps...

      hope this helps
      That steam powered stuff like your Dialarc 250 HF welds beautifully…..

      is simple, rugged and heavily built…

      Nothing about them is delicate…or dainty....

      so expect repair parts to be heavy duty...
      Last edited by H80N; 12-13-2013, 05:12 PM.

      Comment

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