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Millermatic 350P Gas Issue

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  • Millermatic 350P Gas Issue

    Got a 350P with a Python push/pull gun and it seems to have a gas delivery issue. I have to have the flowmeter cranked to max in order to get proper shielding. At 25cfh of argon, it very rarely produces a nice weld. I have tried a different flowmeter and the problem persists. Is this a common problem?

  • #2
    350p gas flow

    Any problem with your 400 gun on steel ?. That should tell you where the
    problem lies.
    B.J.

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    • #3
      I have never had the problem myself, but how do you know that 25 cfh is getting to the nozzle?

      One thing to check is try the flow without connected to the machine to see if there is a difference.
      Myself I use a portable flowmeter from netwelding.com to actually verify the flow at the nozzle.

      You say argon, so I assume you are welding alum?
      Last edited by shovelon; 05-19-2013, 07:14 AM.
      Nothing welded, Nothing gained

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      • #4
        Originally posted by bridgeportBJ View Post
        Any problem with your 400 gun on steel ?. That should tell you where the
        problem lies.
        B.J.
        Good point. I have a separate gun for steel, so that will determine whether the problem is in the machine, or my push/pull gun.

        Originally posted by shovelon View Post
        I have never had the problem myself, but how do you know that 25 cfh is getting to the nozzle?

        One thing to check is try the flow without connected to the machine to see if there is a difference.
        Myself I use a portable flowmeter from netwelding.com to actually verify the flow at the nozzle.

        You say argon, so I assume you are welding alum?
        Yup, welding aluminum. I do a lot of tigging, and often I put the torch up to my cheek to verify argon flow. When I do that with this Python gun, there is no comparison that its much less than I'm use to feeling.

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        • #5
          OK, easy fix, cause I just know you used teflon tape on the brass fittings. Remove the gas hose to machine connector, inside you'll see a little screen. is it full of tap, or other stuff, probably, clean it and no more tape,,,,

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