New to Aluminum welding. Need some help with an issue

[Gary]

A lot of that looks like contaminated argon. It is funny that some welds look like they are getting in the right direction then fade out. What are your argon setting? Also are you welding in any wind at all? That might be that when you are welding some are better than others because if the wind blows away your sheilding gas then you get the black no gas coverage. With the one picture that you where trying to weld 2 peices together it looks like way too many amps and blowing it out , and also could be jakesporting says if you are welding on plywood that will mess with your sheiding gas as well .
Also can you hear the gas coming out on the torch tip , as in pre flow and post flow , I wonder if you might have a loose argon line or a sticky gas solenoid on the welder.
Hope this leads you in the right direction to the problem..
Gary

[Gary]

Hey Krookz,
Just looked around and found that you have the 205 combo unit.
OK this is what I suggest to get started with settings.
TAKE OFF THE FOOT PEDAL
Use 2T setting to start
set pre flow to 2 seconds and post flow about 3 or 4 seconds
Aluminum will build up heat and need to be turned down after a few welds
Set your argon guage to 5 LPM
Set amps for aluminum approx 55 amps for .125 aluminum to start . It might take a few seconds to start a puddle but I am trying to figure out why you have not gas coverage.
Set ac freq to about 1 o clock and balance at about 9 oclock
and turn off the pulse.
Without the foot pedal that might help you get used to the amp control so you are not floaring the amps to get started abd blowing out the material.
Give those setting a try to rule out the foot amp control and report back
But it does look like a gas coverage problem, The aluminum from the pic does not look like it has clear anodizing on it but make sure its clean like you did.
Gary