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  • why is this

    Ok I have a Sync 200 and am tigging steel on dcep...160 amps. The arc will start, make a puddle and I start to add filler and then without lifting my foot off the pedal pushed to max, the arc will get smaller and less power and then it may get to full power again without me changing anything. ??????????
    Nick
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  • #2
    Does it happen when your running in pulse? Cause that pulse runs from where ever you set your peak amperage to where ever you set your low or background amperage

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    • #3
      Originally posted by monte55 View Post
      Ok I have a Sync 200 and am tigging steel on dcep...160 amps.
      Not that it addresses your problem, but shouldn't you be tigging steel on DCEN?
      Last edited by Helios; 02-16-2011, 11:59 AM.

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      • #4
        Arc length.

        You don't realize it, but you're changing the tungsten to work length.
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        • #5
          Not sure what SundownIII is saying.

          SundownIII can you explain?
          "You don't realize it, but you're changing the tungsten to work length."

          Just asking.

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          • #6
            What he is saying is he may be moving the torch closer then farther away then back close again.
            Its easy to mistakenly do as you start moving both hands in sync.

            Adding filler with one hand and unknowingly moving the other hand with the same motion.

            Just maybe Sundown is correct.

            Only other time I seen something similer is from running the welding machine from a gas generator that couldn't
            keep up.
            Last edited by Hardrock40; 02-16-2011, 12:38 PM.

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            • #7
              Originally posted by Hardrock40 View Post
              What he is saying is he may be moving the torch closer then farther away then back close again.
              Its easy to mistakenly do as you start moving both hands in sync.

              Adding filler with one hand and unknowingly moving the other hand with the same motion.

              Just maybe Sundown is correct.

              Only other time I seen something similer is from running the welding machine from a gas generator that couldn't
              keep up.
              Ok...I understand.

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              • #8
                The switch is to the left..electrode negative....the pulse was on but set at the lowest. I turned pulse off totally and tried again. It didn't do it. I'll do more checking.....thanks guys
                Nick
                Miller 252 Mig
                Miller Cricket XL
                Millermatic 150 Mig
                Miller Syncrowave 200 Tig
                2-O/A outfits
                Jet Lathe and Mill
                Jet 7x12 horz/vert band saw
                DeWalt Multi Cutter metal saw
                Century 50 Amp Plasma Cutter
                20 ton electric/hydraulic vertical press
                Propane Forge
                60" X 60" router/plasma table

                www.youtube.com/watch?v=jTu7wicVCmQ
                Vist my site: www.nixstuff.com
                and check out some of my ironwork and other stuff

                Comment


                • #9
                  Originally posted by monte55 View Post
                  The switch is to the left..electrode negative....the pulse was on but set at the lowest. I turned pulse off totally and tried again. It didn't do it. I'll do more checking.....thanks guys
                  Monte: What's the material thickness? I rarely use the pulser, unless it's thin material. Tungsten type?

                  As Sundown mentioned, it's easy to "pull back" on the torch, which changes your arc length. As a rule of thumb, arc length should be one electrode diameter.

                  Remember, this is a CC process, and like SMAW the voltage (electrical pressure) varies with arc length.
                  "Bonne journe'e mes amis"

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