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Miller 3545 spool gun hard arc starting

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  • Miller 3545 spool gun hard arc starting

    Hi i purchsed a 3545 spool gun and 100c control box on Ebay to use on my 1975 miller big 40. I recently got around to hooking it up and trying the setup out. My problem is the arc is very difficult to almost impossible to get started especally at lower amps. Any help would be greatly appreciated.

  • #2
    Well of course your going to have a hech of a time, as your big 40 is a CC only machine whilst your wire, and thats any wire kinda needs CV

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    • #3
      Well is there anything I can do to make this setup work any better?

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      • #4
        Originally posted by cruizer View Post
        Well of course your going to have a hech of a time, as your big 40 is a CC only machine whilst your wire, and thats any wire kinda needs CV
        CC is Constant Current which is a stick welder. CV is Constant Voltage which is a mig welder. So you would need another welder that is CV...Bob

        Read here. http://www.weldmart.com/aec-200%20cc...n%20system.htm
        Last edited by aametalmaster; 08-21-2011, 01:46 PM.
        Bob Wright

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        • #5
          Well ive been looking around of the net a little and came across the Miller Wc-115A Control with optional contactor. Its used on both cc/cv power sources,and used with the 30A Spool gun. My question is could it be used with my Spoolmate 3545?

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          • #6
            Nope on the 3035 coupling to a WC115, and unless your running steel, on a voltage sensing feeder, not much is going to work for you.

            I mean mild steel wire on CC is going to be non structural spray, dual shield works great but I don't think you can get 2lb spools.

            Aluminum works ok, once you get it started, but you'd likely go through multiple tips and wire before that happened.

            Innershield is so, so, on CC.

            Now the reason behind the voltage sensing aspect on CC, is that its virtually impossible to control your wire stickout, thus burning back to the tip is a contant problem. As your varing a limited voltage with your wire speed overcomming the already high fluctuating amperage

            In CV, your controlling a set limited voltage and adjusting amperage so wire stickout is not a problem

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