Mig gasses

[hog987]

My oxygen bottle sometimes freezes up on the propane/oxygen torch, and i get the regulator on my MIG iced, but it never froze... But expanding gasses DO take up a lot of heat from the environment...

Oh, and when you're used to heavy welding i've got a question: Are there any contact tips that last longer than the standard ? I have a 350A welder, i didnt take the water cooled torch because it was 500 euro more expensive, and hobby is just hobby. But my frustration is that i burn the tips blue within 10 minutes of full power welding, so the wire rips pits out of the contact tips so it jerks. The temperature of the toch in my hand was never a problem, just the tips burning. Any advice plz ?

If your doing a lot of heavy welding one thing that works is to run a size bigger contact tip. This really helps when the tip gets hot.

 

[Jesse masterson]

I don't know why you would think you need to switch regulators I know many people think that but from exsperience you can use your Argo co2 mix and straight co2 with the same regulator with no problem.

 

[N8ghz]

I have several different flow-meters, a couple of Airco's,etc. like 4 in all.
I have used Airco Helium units with Helium, Str8 Argon, 75-25, & Co2.
The scales on a specific flow-meter are for what they are labeled as, but that doesn't mean it can't regulate some other gas, just that the numbers won't be accurate.
Remember Argon is heavier than air & Helium is lighter, and so on.

I have one flow meter that has a rotating square plastic indication tube (where the BB is) and it can be rotated for 4 different gases (each with the appropriate scale). So that one can be considered accurate on any gas bottle that you can make it screw on to.

I don't pay much attention to any of the numbers, no matter which flow meter I am using.... I watch the performance of the process and only go high if it's a little windy, if I can't move out of the breeze.

I have never seen a Co2 regulator freezing on small wire MIGs, only on large wire (like 1/8") setups. When I ran those we had heated flow-meters.

 

[Paul N]

My regulator has a vertical sight glass with a floating ball to indicate flow rate. It has 3 sets on calibration marks on the glass. One for CO2, one for Argon/CO2 mix, and one for Helium. This regulator will work for all 3.

 

[killdozerd11]

First rule of thumb when going overhead vertical or horizontal is reducer current by 10% Try that

Your problem is not your shielding gas
CO2 gives better penetration but more spatter
ARGON gives less penetration and less spatter

That is why the 75/25 mix is popular with a lot of welders nice pen less clean up at a higher cost than CO2 though real popular in the auto body repair business

You get a lot more production out of a liquid CO2 tank than a gas mix tank of the same size

You will only get spray transfer if your machine is capable of it
most gas used in spray transfer are 98/2 Argon/CO2 or if you really want it hot 98/2 Argon/Oxygen
Better have a mig gun and nozzle rated for it or you won't have it for long

Spray is usually only done on 1/2"thick or better welds

Go to
weldingweb.com

Search for spray transfer or spray arc
There are numerous posts on the subject by guys that do it for a living and some that don't

 

[ericher69]

I don't know why you would think you need to switch regulators I know many people think that but from exsperience you can use your Argo co2 mix and straight co2 with the same regulator with no problem.

My flowmeter on my Lincoln specifically says for CO2 only!

 

[ericher69]

My regulator has a vertical sight glass with a floating ball to indicate flow rate. It has 3 sets on calibration marks on the glass. One for CO2, one for Argon/CO2 mix, and one for Helium. This regulator will work for all 3.

What you have is a flow meter.

Tried editing previous post but no go so new reply

Sorry