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  1. #11
    Join Date
    Sep 2005
    Location
    northern NJ
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    1,841

    Default

    Tryagn5 -- I don't see anyone here that is saying air arcing is harmful to machines in general. Just giving advice. I was told by the service tech not to use inverters for cac. He even told me not to use a Syncrowave. As far as maxing it out that is something else that has been said a lot on this site as well as in the field.

    I'm glad you are able to use yours as you do without any issues.
    Last edited by MMW; 03-25-2014 at 06:00 PM.
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  2. #12
    Join Date
    Aug 2004
    Location
    Milan Michigan
    Posts
    1,701

    Default

    MMW, I probably will never air arc off my Dynasty 300DX, nor will I arc weld off of it, But that because I have other options.

  3. #13
    Join Date
    Sep 2009
    Location
    Canada
    Posts
    179

    Default

    I've arc aired with a few inverter power supplies. XMT 304, XMT 350, Invertec V350. No issues with any of them. Crank them wide open just don't exceed the duty cycle and you will have no problems.
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  4. #14
    Join Date
    Jul 2008
    Location
    Flin Flon & Creighton area
    Posts
    232

    Default air arc and duty cycles

    All good info here as others have posted, I would add that depending on how much gouging you are doing will dictate what you need machine wise. If your gouging using the small carbons, most machines will fit the bill without damage. A person has to be realistic though. a 300 to 400 amp machine will run 1/4 inch carbons without issue, if you are going bigger match power accordingly. If you still need more try paralleling two or more power sources. Usually the big guns like dimensions or goldstars 650 amp classwork good, but the big diesel engine drives work nice as well. Run minimum 4/0 cables and have good air (high CFM). Match your air arc stinger as well. Arc air k4000 will take a lot of power up to 1000 amps. if you still need more arcair has the tri-arc foundry torch that is rated for 1600 amps when you get to those carbons. I have run the 3/4 inch segmented carbons that lock together at around 1200 to 1400 amps. When you run that much juice its good to run tandem 4/0 cables or bigger MCM cables. Kind of neat to have got the experience doing this, you can plow through a lot of metal and the slag that comes off is like a volcano erupting!
    I have a welding addiction

    ...the only stupid question is the one you didn't ask

  5. #15
    Join Date
    Oct 2009
    Location
    Reno, NV
    Posts
    298

    Default

    CAC = crap (HOT crap) flying everywhere and making a BUNCH of noise while doing it. Personally, I never liked CAC, but I guess it DOES have its uses. But me...given ANY kind of a choice, I will do about any kind of cutting in order to avoid CAC!!
    Don J
    Reno, NV

    Never pick a fight with an old guy. Old guys are too smart to fight and get hurt. They'll just kill you and get it over with.

  6. #16
    Join Date
    Jul 2008
    Location
    Delhi, Ontario:
    Posts
    1,970

    Default

    Quote Originally Posted by Tryagn5 View Post
    Would people stop pushing the idea that air arcing hurts machines, i have air arced off every machine i have owned, and i air arc a lot. Also as for bad for invertors, my maxtron 450 i had for 10 years, i ran about 150 boxes of 1/4 carbons through it, never had a probelm. Simply use the machine within its duty cycle and gouge away, what is the difference between 250 amps running large wire or an air arc electrode, other than cv vs cc current.
    Kevin
    Yep,I totally agree.
    I've run 3/16" carbons for hours at a time with my Lincoln Ranger 8 and no problems at all !

    Norm

    Sunrise Outside My Shop In Delhi, Ontario

    - Arcair- K 4000 CAC.

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  7. #17
    Join Date
    Aug 2004
    Location
    Milan Michigan
    Posts
    1,701

    Default

    Dondlmn, Maybe your doing something wrong, When working on heavy equipment out on a job, there's nothing better than a carbon arc, If your inside than I can see your point.

  8. #18
    Join Date
    Feb 2005
    Location
    N.E. SD
    Posts
    1,378

    Default

    I run 1/4 off my vantage 300s, and have run 3/8 off a SAM400, and a whole lot of 5/16 and 3/8 off a variety of Millers years ago. The whole thing is stay within the machine's capability and practice until you are smooth and not choppy.

    Out in the field, or even in the shop, I don't think there is a better way to gouge cracks and old welds.
    Jeff

  9. #19

    Default

    Is carbon arcing with a 1/4 in rod at 300amps any different than a 1/4 inch 7018 at 300ams???? As in hard on the guts of a welder???
    Say on an XMT???
    I've Air-arced of my Invertec 275 at 275 amps with a 1/4 inch rod.
    Is it hard on machines, any harder than 7018???
    ~John

  10. #20
    Join Date
    Aug 2004
    Location
    Milan Michigan
    Posts
    1,701

    Default

    AK Weldshop, I typically run a 1/4" carbon at about 350 amps and have been running it off my XMT304 and off my Pipe Pro 304 and their both over 10 years old.

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