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350P porosity issues

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  • wagin
    replied
    You have a small leak in the gas flow system allowing atmosphere to be sucked into gas flow stream. Atmosphere includes oxygen and results in contamination of weld shield resulting in porosity. Use a spray bottle filled with soapy water to find leak while system is pressurized but not when welding. when welding, the small leak caused a Ventura effect, sucking atmo.

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  • ryanjones2150
    replied
    Vacation? What's that?

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  • Danno
    replied
    Well, I contacted my LWS where I bought the machine(s) and guns and had their people look at the gun with the grips removed and they agree it leaks very bad around where the hose assy. meets the gooseneck. So they gave me a brand new in the box tweeco spraymaster and said Merry Christmas! So I will let you know the out come when I return from vacation.

    Merry Christmas everyone!

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  • Danno
    replied
    Originally posted by ja baudin View Post
    Had some of the same trouble when I first got my machine. Would weld erratically and could never figure it out. Swapped the push pull for a spool gun and it welded fantastic. Gave the push pull away on ebay, never looked back.
    My problem is it does it with both guns, my tweeco #4 and my push pull.

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  • ja baudin
    replied
    Had some of the same trouble when I first got my machine. Would weld erratically and could never figure it out. Swapped the push pull for a spool gun and it welded fantastic. Gave the push pull away on ebay, never looked back.

    Leave a comment:


  • H80N
    replied
    Originally posted by Checkered Flag View Post
    I was trying to push aluminum. It was a good machine, don't get me wrong, just too detailed thin work for it
    For thin aluminum... I tend to go to TIG and the Dynasty 350..... I just LOVE that thing.....

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  • Checkered Flag
    replied
    I was trying to push aluminum. It was a good machine, don't get me wrong, just too detailed thin work for it

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  • H80N
    replied
    Originally posted by Checkered Flag View Post
    I had a 350p, Between being too big for the job and not getting the desired results, I sold it. Turned up high it was great, but down low it was well, just not low enough for what I do.
    Never had that problem with mine.... seems to run .023 wire (ER70) just fine on the low end... and it is a wonderful monster on the top end...
    Last edited by H80N; 12-22-2015, 08:49 PM.

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  • Checkered Flag
    replied
    I had a 350p, Between being too big for the job and not getting the desired results, I sold it. Turned up high it was great, but down low it was well, just not low enough for what I do.

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  • H80N
    replied
    Originally posted by mikesystem View Post
    ya but it would clean up with gas cranked to the max and weld looked great but 50 cfm flow is crazy high also the oil was not noticable by eye
    Am agreeing with ya...

    Contamination is one the fist things to look for... along with gas coverage
    Last edited by H80N; 12-22-2015, 07:50 PM.

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  • mikesystem
    replied
    Originally posted by H80N View Post

    CONTAMINATION...!!!!

    Oil would sure muck things up and cause porosity....
    ya but it would clean up with gas cranked to the max and weld looked great but 50 cfm flow is crazy high also the oil was not noticable by eye

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  • H80N
    replied
    Originally posted by mikesystem View Post
    this is the same problem i had with my hobart i had it pissed me off to the point i bought a new 350p anyways yesterday i started looking to figure out why mine was doing the same as yours if i wanted a clean weld i needed to run it at 50 cfm to get a clean weld if not it looked like popcorn found two things with mine the liner had oil in it down inside i let out about 5 feet or wire and used a white rag wiped the wire down and was oil on the rag it was coming from my wire feed rollers so i cleaned it up changed the liner and now it welds like new again back at 20 cfm but its been doing it for a few years and never really took the time to take it apart and see what the problem was but its mint now
    CONTAMINATION...!!!!

    Oil would sure muck things up and cause porosity....

    Originally posted by H80N View Post
    .....

    Porosity is usually caused by a gas coverage or contamination problems...
    Last edited by H80N; 12-22-2015, 07:28 PM.

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  • mikesystem
    replied
    this is the same problem i had with my hobart i had it pissed me off to the point i bought a new 350p anyways yesterday i started looking to figure out why mine was doing the same as yours if i wanted a clean weld i needed to run it at 50 cfm to get a clean weld if not it looked like popcorn found two things with mine the liner had oil in it down inside i let out about 5 feet or wire and used a white rag wiped the wire down and was oil on the rag it was coming from my wire feed rollers so i cleaned it up changed the liner and now it welds like new again back at 20 cfm but its been doing it for a few years and never really took the time to take it apart and see what the problem was but its mint now

    Leave a comment:


  • H80N
    replied
    I would still measure gas flow at the nozzle and see how it tally's with the settings at the regulator

    Your air pressure test still strikes me as having little utility....

    I might blow the lines out backwards though and see if anything pops out
    Last edited by H80N; 12-22-2015, 05:55 PM.

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  • Danno
    replied
    No I am just checking for blockage, so no not with a flow meter at the tip but, it does leak like heck where the goose neck connects to the hose assy. possibly drawing in oxygen.

    What this test has done is, proves to me there is no blockage anywhere in the system and that gas or air will freely flow from one end to the other.

    The mig gun leaks in the handle area, but the Aluma Pro XR does not.

    I looked over the flow rate chart, and for a far back as I can remember I have ran about 20-25cfh on a non pulse machine on any thickness, we just never adjusted the reg./flow meter from there.

    Air gas says on this machine 35-40 cfh, man that sounds high! I would think that would draw oxygen right in, maybe even a small child or pet...

    But now where to look?

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