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Thread: AC/DC Question

  1. #1
    Join Date
    Jan 2007
    Posts
    16

    Default AC/DC Question

    Hmmm.... still waiting on parts for my Thunderbolt to come in. Hopefully today is the day- I'm gettin' pretty antsy.

    Until then I've got another question for ya! Weeding through the threads I've noticed that whether it straight or reverse most with the capability seem to prefer using DC current. Are there specific places where AC is better? If I went to using DC (if my parts ever arrive! lol) would I ever need to switch the dial back over or just happily never look back??

    Scuffy

  2. #2
    Join Date
    Dec 2006
    Location
    Central Alabama
    Posts
    40

    Default

    I am one of the least qualified to answer based on my personal limited experience, but from what I have read most say to put it on DC for good, except if you want to use true 7018AC rods.

  3. #3
    Join Date
    Dec 2005
    Location
    Dallas, TX area
    Posts
    267

    Default Make it permanent......

    Slap that bad boy on DC,

    Rip off the knob,

    And......Never look back.

    Seriously, I never use AC for anything and don't plan to. I keep three rods on my truck: 6010 5P+, 7018 and 6011 and run all three on DC. The 5P+ and LoHy on DCEN and 6011 DCEN for carbon steel and DCEP for galvanized.

    Good luck.
    Triggerman

    Ammonia refrigeration tech
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    "A professional knows what to do. A craftsman knows why."

  4. #4
    Join Date
    Jan 2007
    Location
    Noth Dakota
    Posts
    505

    Default

    You should try AC once to see what it is like. then leave it on DC.

  5. #5
    Join Date
    Sep 2002
    Location
    Clark County, NV
    Posts
    2,696

    Default

    AC is good for countering an arcblow problem, which can happen with certain scrap or magnetic metals, joint designs, and work clamp locations. But it'll still be rarely used.

  6. #6
    Join Date
    Dec 2006
    Location
    collinsville, ok
    Posts
    86

    Default

    ac is good when you are tig welding thin stainless or thin copper alloys.

  7. #7
    Join Date
    Feb 2007
    Location
    now in Orlando!!!!
    Posts
    559

    Default

    AC has more deposition, less penetration than DCRP, and looses less voltage on long lead lengths, it is also more dangerous, it takes a lot less AC to stop a heart, especially around wet areas. It can also have more splatter and needs special rods to run properly as the arc extinguishes everytime it goes between + & -. The rod covering helps keep the arc going by the gases it puts out. Hope this helps ya, Paul

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