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Scooby074 · 05-15-2008, 09:49 PM

It sounds like a shielding gas issue.

Like the others have said check the mig nozzle for any blockages. Also check the small diffuser holes in the gun and make sure they are cleaned out.

You say you can hear the gas, but what CFH are you running on the regulator? Try increasing the pressure to 15-20 CFH if its not there already.

Is the metal that your welding GROUND clean? Check your gun polarity. You'll want DCEP (Reverse) polarity for gas.

Make sure there are no drafts and that you are keeping your gun nozzle within 1/2" of the surface being welded.

Check your gun lead and hose from the regulator to make sure it hasn't been crushed and is restricting your flow to the gun. Also check where the hose goes into your gas solenoid on your machine. There is usually a fine filter in there. I was having poriosity problems with my new machine, turned out that filter was partially plugged with pipe dope.

05-15-2008, 09:49 PM	#10 (permalink)
Scooby074 Bronze Member Join Date: Aug 2006 Location: Nova Scotia Posts: 75	Re: Bad mig welds It sounds like a shielding gas issue. Like the others have said check the mig nozzle for any blockages. Also check the small diffuser holes in the gun and make sure they are cleaned out. You say you can hear the gas, but what CFH are you running on the regulator? Try increasing the pressure to 15-20 CFH if its not there already. Is the metal that your welding GROUND clean? Check your gun polarity. You'll want DCEP (Reverse) polarity for gas. Make sure there are no drafts and that you are keeping your gun nozzle within 1/2" of the surface being welded. Check your gun lead and hose from the regulator to make sure it hasn't been crushed and is restricting your flow to the gun. Also check where the hose goes into your gas solenoid on your machine. There is usually a fine filter in there. I was having poriosity problems with my new machine, turned out that filter was partially plugged with pipe dope.