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  1. #11
    Join Date
    Dec 2007
    Location
    alabama
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    746

    Default

    as he stated he is using pure co2.although i never tried it,does anyone know if this is even doable?
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  2. #12
    Join Date
    Dec 2007
    Location
    Los Angeles
    Posts
    2,831

    Default

    Quote Originally Posted by fabricator View Post
    as he stated he is using pure co2.although i never tried it,does anyone know if this is even doable?
    ???

    CO2 sure, no problem

  3. #13
    Join Date
    Feb 2008
    Posts
    2

    Default Maybe.....

    Well.. At my school when my mig welds turned out like that.... it was the shielding gas.. there was not enough coverage and/or i had to much stick out and the gas wasn't protecting the molten pool enough thus resulting in bad welds.....
    This may be incorrect as I'm not a certified weldor or anything... Although i do plan on it one day...

  4. #14
    Join Date
    Feb 2008
    Posts
    3

    Default Sheild gas

    This is only an observation but you can't use straight Argon on carban steel you have to use Argon/CO2 mix. You can however just use the straight Argon on stainless CO2 won't work for you.

  5. #15
    Join Date
    Nov 2007
    Location
    Appleton WI
    Posts
    59

    Default

    I've used straight CO2 on carbon steel with ok results. It runs kinda hot, so it gave me some problems with burning through the barrel on my smoker. It's ok but I'd tahe the 75/25 blend anyday!!!

  6. #16
    Join Date
    Nov 2006
    Location
    Greeneville TN,
    Posts
    91

    Default

    I use pure co2 all the time on thick or thin steel with no problem other than a little more spatter.

  7. #17
    Join Date
    Feb 2008
    Posts
    9

    Default

    Quote Originally Posted by mi_r16 View Post
    Sorry to say it's no Miller or other high quality welder. It's a SIP Migmate 150 230volt.
    It has negative ground.
    I've tried all possible settings on the welder with just the same result. It has just hi/low and max/med/min for amps and fully adjustable wire feed.
    As for gas flow i've tried everything from nothing to max, and the weld is basically bad no matter what flow.
    It looks like your welds are not receiving sufficient post-flow gas. The SIP Migmate does not have a gas solenoid. A valve is located in the torch and gas flow begins once the trigger is pulled in halfway (pulling it in the rest of the way activates the feed roller and makes the tip hot). When finishing up a weld, ease off the trigger to the point where the wire feed stops but not to where the gas shuts off. Hold it in this position for a second or two, to let the end of the weld remain shrouded in shielding gas, before fully letting go of the trigger and moving the torch away.

  8. #18
    Join Date
    Jan 2008
    Posts
    3

    Default

    Quote Originally Posted by mk10 View Post
    It looks like your welds are not receiving sufficient post-flow gas. The SIP Migmate does not have a gas solenoid. A valve is located in the torch and gas flow begins once the trigger is pulled in halfway (pulling it in the rest of the way activates the feed roller and makes the tip hot). When finishing up a weld, ease off the trigger to the point where the wire feed stops but not to where the gas shuts off. Hold it in this position for a second or two, to let the end of the weld remain shrouded in shielding gas, before fully letting go of the trigger and moving the torch away.
    I have tried this. Didn't help. But I found the gas valve in the torch to be leaking just a little bit, and this is probable where it has been sucking in air polluting the weld. I got a new torch and now the welds are great again!

    Thanks everyone, you've been a great help.

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