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Beginning TIG welder...need some guidance.

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  • H80N
    replied
    Here is a very good old thread on Argon gas flow settings...

    http://www.millerwelds.com/resources...n-flow-setting

    Leave a comment:


  • H80N
    replied
    Originally posted by GG47 View Post

    As a firefighter/gtaw welder, when you use high levels (over 20cfh) you are simply creating whats called a "venturi" effect. Ie: a force through confined space (cup), creating suction, introducing (O2).

    Your cfh is so rapid that it causes a sucking effect from static/ambient O2 source into ur welds due to vacum/ venturi effect.

    Also keep in mind what it is your welding. I do heat exchangers for a living. Tight pipe saddle joints which will only intensify turbulence. Think of it as concentrated air movement between sky scrapers. Believe its called "Stack Effect". My uneducated peers (absolute fools), think its best to jack up amps, wack out the CFH, to get it done. Their welds look like burnt, smeared, dog poop, to be honest! Go back to school!!

    Trueth is, 20cfh, and 1 amp per thousandth base material, and torch angle is all it takes, return to basics. 12-29-2014, 11:56 PM
    20xaerf



    Argons air density is much heavier then ambient air, there for it will only descend. Treat it as such, in a calm manner and hold shielding coverage. I work with titanium and zirconium, even though I weld in sterile white gloves, I never exceed 20cfh. I simply extent the post flow rate, 5-15 seconds longer.
    Good advice... well put...

    Leave a comment:


  • GG47
    replied
    Beginning TIG welder...need some guidance.

    Argons air density is much heavier then ambient air, there for it will only descend. Treat it as such, in a calm manner and hold shielding coverage. I work with titanium and zirconium, even though I weld in sterile white gloves, I never exceed 20cfh. I simply extent the post flow rate, 5-15 seconds longer.

    The name "argon" is derived from the Greek word αργον, neuter singular form of αργος meaning "lazy" or "inactive", as a reference to the fact that the element undergoes almost no chemical react

    Leave a comment:


  • GG47
    replied
    proof in pudding

    Add Content
    Attached Files

    Leave a comment:


  • GG47
    replied
    Beginning TIG welder...need some guidance.

    As a firefighter/gtaw welder, when you use high levels (over 20cfh) you are simply creating whats called a "venturi" effect. Ie: a force through confined space (cup), creating suction, introducing (O2).

    Your cfh is so rapid that it causes a sucking effect from static/ambient O2 source into ur welds due to vacum/ venturi effect.

    Also keep in mind what it is your welding. I do heat exchangers for a living. Tight pipe saddle joints which will only intensify turbulence. Think of it as concentrated air movement between sky scrapers. Believe its called "Stack Effect". My uneducated peers (absolute fools), think its best to jack up amps, wack out the CFH, to get it done. Their welds look like burnt, smeared, dog poop, to be honest! Go back to school!!

    Trueth is, 20cfh, and 1 amp per thousandth base material, and torch angle is all it takes, return to basics.

    Leave a comment:


  • 20xaerf
    replied
    Hey Ron, lot of good advice here. I'll add this. I downloaded the app for iphone iTig. Helped me out a lot. Comes with a calculator. Just select your material, thickness and joint type and it tells you what to set your machine at. Get's you really close. Has a lot more too but that's what I mainly use it for.

    https://itunes.apple.com/us/app/itig/id797132687?mt=8

    Hope this helps you out some.

    Leave a comment:


  • ggiill
    replied
    Hi Ronnielyons

    It is nice your consultation in the Forum.

    People will give you a lot of good advise.

    regards

    Leave a comment:


  • 20xaerf
    replied
    I too have recently begun tig welding. I scoured the web for a lot of resources and half of the time forget to bookmark those pages. I came across a kickbutt mobile app that basically has everything in it devoted to tig welding. The app name is iTig and I believe it only works on the ipad/iphone.

    Hope this helps!

    Leave a comment:


  • stickermigtigger
    replied
    http://www.weldingtipsandtricks.com

    Leave a comment:


  • H80N
    replied
    Originally posted by Goodhand View Post
    Perhaps we should not be so quick to judge on the gas flow, since we really have no info on what type of regulator is in use. Maybe... his regulator only puts out 15 cfh.
    Bad advice is bad advice....40 CFH Argon..?? that was just plain wrong...

    we do a great disservice to the beginner when we let that type of misinformation slide...
    Last edited by H80N; 06-20-2014, 11:59 AM.

    Leave a comment:


  • Goodhand
    replied
    ld Skool
    Originally Posted by southlandrunner
    Be sure and use 2% tungsten and i always use the highest gas flow my reg will put out. Also make sure u r running dc negative. Sounds like u r running dc positive aince the tungsten is doing that.


    Correct on the polarity if he's welding steel, completely wrong on the gas flow no matter what he's welding.

    Perhaps we should not be so quick to judge on the gas flow, since we really have no info on what type of regulator is in use. Maybe... his regulator only puts out 15 cfh.

    Leave a comment:


  • Old Skool
    replied
    Originally posted by southlandrunner View Post
    Be sure and use 2% tungsten and i always use the highest gas flow my reg will put out. Also make sure u r running dc negative. Sounds like u r running dc positive aince the tungsten is doing that.
    Correct on the polarity if he's welding steel, completely wrong on the gas flow no matter what he's welding.

    Leave a comment:


  • H80N
    replied
    Originally posted by southlandrunner View Post
    That is true! Dint think bout that but i think 40 wld b fine. Also depends on the lense. There r so many variables its hard to answer without watching.

    Typical Argon flowrate is somewhere in the neighborhood of 13-20 Cubic Feet per Hour... depending on cup...

    Where the heck did you get 40..?? way too high for normal Argon...
    Last edited by H80N; 06-18-2014, 07:40 AM.

    Leave a comment:


  • southlandrunner
    replied
    Originally posted by H80N View Post
    NOT CORRECT...

    too high an argon flowrate is as bad as too low...

    an excessively high gas flow will cause turbulence and pull in air to the weld gas envelope
    That is true! Dint think bout that but i think 40 wld b fine. Also depends on the lense. There r so many variables its hard to answer without watching.

    Leave a comment:


  • H80N
    replied
    Originally posted by southlandrunner View Post
    i always use the highest gas flow my reg will put out..

    NOT CORRECT...

    too high an argon flowrate is as bad as too low...

    an excessively high gas flow will cause turbulence and pull in air to the weld gas envelope

    Leave a comment:

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