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bobcat 225 and tig alum

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  • retiredIW
    started a topic bobcat 225 and tig alum

    bobcat 225 and tig alum

    need to tig an aluminum oxygen cylinder base back on to cylinder what setting to use with weldcraft tig torch and argon gas.i know i have to scratch start on a piece of copper, it is 3/16 thick aluminum. machine is bobcat 225NT

  • fabricator
    replied
    I hope after 7 months he figgured it out.

    Leave a comment:


  • Speedddy
    replied
    ALum

    I welded it with a XMT 304 at work with Helium.We didn't have a hight Feak.Which I do at my shop.I got a Syncrowave 250 DX with a watercooled rig.Miller 252,Miller 140 and 2 other machines/ 675 plasma.Fixing to get Trailblazer 302.My coworker is the one who shown me You could use helium.I tried it I really didn't like the way it welded it wasn't as clean like my new Syncrowave 250 DX LOL

    Leave a comment:


  • SundownIII
    replied
    The copper sheet was used for starting an arc in DC Tig welding. Does not contaminate the tungsten as even steel will. Generally used on machines without a lift-arc feature.

    As has been mentioned, Hi Freq is required for AC Tig welding. Without it (except for the inverters) the arc will extinguish as it passes thru 0 when switching from DC+ to DC-.

    Leave a comment:


  • FusionKing
    replied
    Originally posted by retiredIW View Post
    it supposedly dont eat the tungsten
    I do not doubt one bit that there is a place for the copper thing...I have heard it as well but it is not used for aluminum. Trust me I did about 10 years on a 225NT Bobcat with an old Linde Freekbox and a #26V torch with a valve and pure argon. That is the minimum you will get by with unless you can score lab grade helium for using DC EN.
    You should just find someone with a spoolgun or hire a pro to tig it for just welding one item.
    Bring your stuff and come on down to my shop and I'll do 'er for free
    I like to shoot the bull with old welders

    Leave a comment:


  • Guest's Avatar
    Guest replied
    You can DC tig aluminum......why wouldn't it work with the Bobcat?
    Originally posted by fabricator View Post
    Thats a new one for me.I think you were misinformed.However you will need high frequency a/c in order to tig aluminum.

    Leave a comment:


  • Speedddy
    replied
    alum welding

    You can use Heilum to weld alum But it's not as clean.Rent a bottle for a month will it be cheaper.

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  • fabricator
    replied
    Thats a new one for me.I think you were misinformed.However you will need high frequency a/c in order to tig aluminum.

    Leave a comment:


  • retiredIW
    replied
    why copper

    Originally posted by fabricator View Post
    Why copper?
    it supposedly dont eat the tungsten

    Leave a comment:


  • retiredIW
    replied
    conversion to cold smoker

    Originally posted by Craig in Denver View Post
    I hope you're only making something decorative. There's NO welding allowed on any high pressure cylinder. Not even during manufacturing.
    it is to be part of a cold smoker no pressure

    Leave a comment:


  • Craig in Denver
    replied
    I hope you're only making something decorative. There's NO welding allowed on any high pressure cylinder. Not even during manufacturing.

    Leave a comment:


  • fabricator
    replied
    Why copper?

    Leave a comment:


  • BC Iron works
    replied
    you need a high-frequency arc starter and stabilizer
    like the miller HD-251 to weld aluminum with the bobcat
    they run around $1000.00

    Leave a comment:

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