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  1. #1
    Join Date
    Aug 2003
    Posts
    84

    Default What's the "Arc control" switch do?

    One of our Synchrowave 250's has an "Arc control" switch. Can anyone tell me what the science is behind this switch? What is it doing to control the arc? Also, does this switch control arc in both AC and DC modes? When should it be used? Thank you in advance.
    Miller 350P XR push/pull
    Miller 250 DX
    Spectrum 2050 Plasma

  2. #2
    Join Date
    Sep 2002
    Location
    Clark County, NV
    Posts
    2,696

    Default

    Are you refering to the Balance/Dig control?

    In SMAW, this changes the inductance of the welding circuit, allowing a more forceful, digging arc for rods like 6010 or a softer arc for smoother 7018s.

    In AC GTAW, it acts as a balance control for DCEN/DCEP, within the capabilities of the power source, 32% DCEP - 55% DCEP for this model, for controlling the cleaning action when welding aluminum and magnesium. You can also use it to restabilize the arc from rectifying under high-amperage or helium conditions.

    You can get the manual for your specific serial number here:

    http://www.millerwelds.com/service/ownersmanuals.php

  3. #3
    Join Date
    Aug 2003
    Posts
    84

    Default

    Thanks Mac, but no, this is just a toggle switch....Arc control on/off...I'm up to speed on the balance/dig control. Thanks for the online manual resource.
    Miller 350P XR push/pull
    Miller 250 DX
    Spectrum 2050 Plasma

  4. #4
    Join Date
    Sep 2002
    Location
    Clark County, NV
    Posts
    2,696

    Default

    Okay, from an older model. Here's the excerpt from your manual:

    1 Arc Control (Dig)
    For AC And DC SMAW Welding
    When set at 0, short-circuit amperage
    at low arc voltage is the same
    as normal welding amperage.
    When setting is increased, shortcircuit
    amperage at low arc voltage
    increases.
    Set at 0 for GTAW welding.

    2 Arc Control Switch
    Place switch in the ON position to
    turn on arc control circuitry. When
    switch is in the OFF position, no additional
    amperage is available at
    low arc voltages. Place switch in
    the OFF position while performing
    Gas Tungsten Arc Welding
    (GTAW).

    Application:
    Control helps arc starting or making
    vertical or overhead welds by increasing
    amperage at low arc voltage,
    and reduces electrode sticking
    while welding.

  5. #5
    Join Date
    Feb 2006
    Posts
    103

    Default

    Control helps arc starting or making vertical or overhead welds by in-creasing
    amperage at low arc volt-age, and reduces electrode sticking

    I have tried it and it does not seem to make much difference to me. should be off for tig welding.


    http://www.millerwelds.com/om/o353u_mil.pdf

  6. #6
    Join Date
    Aug 2003
    Posts
    84

    Talking

    Thank you....
    Miller 350P XR push/pull
    Miller 250 DX
    Spectrum 2050 Plasma

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