Gas question

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So I have the miller spool gun for my miller 140 auto set. I have a tank of argon, but what should I set the gas at? There is no setting any where telling me what cfm to put it at?
Reply:Its been a little while since I migged anything, but I think 15-20-25 cfh. You might need more if theres any breeze at all, or any other conditions like that. This link might help (but no promises) :http://www.millerwelds.com/resources...calculator.php[Account Abandoned 8/8/16 Please Do Not Attempt Contact Or Expect A Reply]. See you on YouTube! -ChuckE2009
Reply:If it's straight argon, better set it in the back of your truck and take it to your LWS and trade it for some 90/10 or CO2 or some 75/25.  You want a gas that's usable for mig welding.  100% argon ain't it."The man of great wealth owes a peculiar obligation to the State, because he derives special advantages from the mere existence of government."  Teddy RooseveltAmerican by birth, Union by choice!  Boilermakers # 60America is a Union.
Reply:"The most common shielding gas for MIG welding aluminum is 100 % argon. Flow rates of 20 to 30 CFH (cubic feet per hour) are acceptable." -Miller's WebsiteDont think so, Bob... Hes welding aluminum, with a spool gun.[Account Abandoned 8/8/16 Please Do Not Attempt Contact Or Expect A Reply]. See you on YouTube! -ChuckE2009
Reply:Bob since he has a spoolgun, I think he wants to do alum mig. if so 100% argon is correct for that use. 100% argon is only wrong if he wants to weld steel with mig..No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth! Ronald Reagan
Reply:You are right.  Didn't catch the spool part.  Must be some pretty thin aluminum though."The man of great wealth owes a peculiar obligation to the State, because he derives special advantages from the mere existence of government."  Teddy RooseveltAmerican by birth, Union by choice!  Boilermakers # 60America is a Union.
Reply:100% argon@35 to 40 cfm and you will be fine.Hope this helps.
Reply:35-40 CFM.  Really.....Even 35-40 CFH will probably blow out what little arc that machine produces.Some people don't have a clue what they're talking about.Where the he11 are these posters coming from????  Must be migrating over from the Chi-Com supported forums.Syncro 250 DX Dynasty 200 DXMM 251 w/30A SG XMT 304 w/714 Feeder & Optima PulserHH187Dialarc 250 AC/DCHypertherm PM 1250Smith, Harris, Victor O/ASmith and Thermco Gas MixersAccess to a full fab shop with CNC Plasma, Water Jet, etc.
Reply:Thanks guys Im trying some of the settings you guys recommended. 20 seems to work pretty well.. going to continue to mess with it
Reply:Originally Posted by randy o100% argon@35 to 40 cfm and you will be fine.Hope this helps.
Reply:This is the result I got @ 20. Looks okay to me, First time I have really tried the aluminum with the mig.
Reply:In Australia we use metric,ie l/mTig 7-14 Im in a factory I use about 7 on Stainless and 8 on AllyMig 10-20, Ally I use about 10-11 a mate of mine who is vastly more experienced than me swears by 18...I don't seem to see any difference.I only ever do Ally , no Steel or Stainless in Mig , well very rarely.All are for 100% Ar at Sydney type temp ranges.Tried a bottle of 50/50 He Ar and found I needed to bump the flow up a bit .Gave up on the He as I didn't like the way it welded and truth be known I was trying to get my PT 185 Lincoln to do what I should have been doing on my TransTig 300.Check your flow meter maybe its in metric?A good guess is better than a bad measurement
Reply:Switch to Helium argon 50/50 or 75/25 and you might be able to get those toes wetted in.I forgot how to change this.