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  1. #1
    Join Date
    Nov 2008
    Location
    Colorado Springs
    Posts
    276

    Default Alum MIG - I've lost it

    Hi All,

    I am attempting to re-educate myself on alum MIG. and failing.
    It has been over 6 years since I have done this proceedure and have found that I am having a more problems than expected. The project is 3/4" 6061-t6 simple fillet two sides. Clean material with lacquer thinner and a ss brush. Pre-heat the pieces. 100% argon, spool gun 4043 wire, I have 3/64". I know 1/16" would be better, just starting with what I have in stock.

    Results using start parameters from the calculater at 29 volts+/-
    adjusting the wire speed
    result: crap. looks like burnt rabbit poo

    I have moved voltage up 2 and down 3volts have ajusted wire speed all over the map, checked for leaks in the argon supply. I am out of ideas. I moved the weld speed so fast that it was ok but lacked penetration.

    I could really use that one piece of info that I am over looking.

    Thanks in advance
    Harold
    Live Right Have Fun

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  2. #2
    Join Date
    Feb 2010
    Location
    YOUNGSTOWN, OHIO
    Posts
    172

    Default

    3/64 wire is just fine. It sounds to me like you are dragging your puddle rather than pushing it.
    Also, set your volts between 22-28
    amps between 130-290
    wire speed between 235-375

    The most important part is pushing your puddle.

    Hope this helps.
    JIM

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  3. #3
    Join Date
    Feb 2013
    Location
    North Dakota
    Posts
    29

    Default Alum MIG - I've lost it

    What machine are you using? How hot is your preheat temp? 29 volts is a lot for 3/64 wire. I have never gone over 26 volts using 3/64 wire but I use 5356 wire so the setting may be different for 4043.

  4. #4
    Join Date
    Dec 2011
    Posts
    385

    Default

    I don't claim to know zip about aluminum mig but is that "in stock" wire left over from 6 years ago? If so a new spool of wire wouldn't hurt.---Meltedmetal

  5. #5
    Join Date
    Jan 2007
    Location
    Montana, USA
    Posts
    232

    Default

    1. You did change polarity when changing from steel to aluminum?

    2. What is the tank pressure of your Argon? If low, then it may be picking up water vapor, combining with the Argon.

    3. Are you welding anodized alum?

  6. #6
    Join Date
    Sep 2005
    Location
    Salem ,Ohio
    Posts
    3,898

    Cool

    Quote Originally Posted by Goodhand View Post
    1. You did change polarity when changing from steel to aluminum?
    I hope not. Solid Steel wire and aluminum both run gun +...Bob
    Bob Wright, Grandson of Tee Nee Boat Trailer Founder
    Metal Master Fab Salem, Oh 44460
    Birthplace of the Silver & Deming Drill
    1999 MM185 w/185 Spoolgun,1986 Thunderbolt AC/DC
    Spool Gun conversion. How To Do It. Below.
    http://www.millerwelds.com/resources...php?albumid=48

  7. #7
    Join Date
    Sep 2005
    Location
    northern NJ
    Posts
    1,831

    Default

    When I do heavy aluminum with my MM250 with 30a spool gun. I watch the puddle carefully as soot tends to build up at front of puddle sometimes. Then I stop, clean & restart or I get a hole in the weld.

    Gun to positive!
    straight argon at about 30 cfh
    28v & about 4.75 to 5 on wire speed (any hotter & it is crap)
    preheat to about 200?
    3/64 wire 4043 for 6061
    slight push angle on gun, maybe 10 degrees?

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  8. #8
    Join Date
    Nov 2008
    Location
    Colorado Springs
    Posts
    276

    Default Good info, all

    I am using my xmt350 with a spool gun
    I have my argon a little low on volume, running around 20cfm so I will turn that up
    gun +
    200 to 220 preheat
    I am pushing but I think the cfm being turned up should help with the shield
    The wire is old but it is kept in a sealed can
    I've been looking at the plate I am using to re-educated and the oxide layer is really heavy, so I will be using all the info presented here and I will take a mill cut on the surface before the final cleaning, just in case I haven't cleared it off all the way.

    you all are the best, thank you
    HH
    Live Right Have Fun

    XMT350 CV/CC
    22A Feeder
    MM175
    Dynasty 200DX
    TB302
    12vs Extreme
    Hypertherm PowerMax 1000
    20" x 40" CNC Mills (2)
    16" x 60" engine lathe
    65 Ton edwards iron worker
    3/16' x 24" power slip roll
    16' power feed mitering bandsaw
    and other fun toys

  9. #9
    Join Date
    Jan 2007
    Location
    Montana, USA
    Posts
    232

    Default

    Quote Originally Posted by aametalmaster View Post
    I hope not. Solid Steel wire and aluminum both run gun +...Bob
    Oops, tired mind thinking flux core.

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