A few welds with my IMIG 200...

[CGCINC]

2" square tubing, 11ga. Mig set at full speed and 21.2 volts
I was running it hot and it seemed to lay in better. I was trying different patterns, weave, circles, straight pull/push... I'm starting to like my IMig!!

[SeanMurphy265]

Looking good! Are you running 220 or 110v?

[bobwills]

They are lookin good. But why are you running it full speed on 11 ga?

[CGCINC]

They are lookin good. But why are you running it full speed on 11 ga?

I'm running 220volts.

I'm at full speed because that's where it felt comfortable. I am making my Steel Rack so since it isn't a beauty contest, I figured I could mess with the welder and get a better feel for it. It really seemed to get good penetration and flow well at these setting......as long as you Keep moving!!

[bobwills]

what size of wire are you using.

[Rodsmachineshop]

being a 160 amp welder .030 wire works about best ,

[CGCINC]

being a 160 amp welder .030 wire works about best ,

.030 is what I am using.

[CGCINC]

Question:
When welding this, it was hot and I had to keep moving so I didn't blow holes.
Why is there no undercut showing?
I know if I'm hot with the TIG I get some undercut.

Is it just the speed I'm moving compared to TIG?

[Rodsmachineshop]

to many amps - volts

[Rambozo]

Question:
When welding this, it was hot and I had to keep moving so I didn't blow holes.
Why is there no undercut showing?
I know if I'm hot with the TIG I get some undercut.

Is it just the speed I'm moving compared to TIG?

It has more to do with the amount of filler. TIG undercutting is usually caused by lack of filler. With the MIG you got the wire flyin', since in short circuit MIG, the Amps and wire speed are tied together, you almost always have enough filler for the heat you are using. That is the one drawback with MIG, that you can't put in heat without putting in filler. What you have there looks great for the fillet portions and real close on the sides. As was mentioned the tubing radius gives you a nice built in groove for the weld. With practice you should be able to get that weld to just over flush. Keep the wire at the front of the puddle, and move from side to side, pausing a little at each side to melt the base metal, but moving pretty fast over the center where the groove is. Then you won't add so much filler and you will concentrate the heat where you need it most.

[performance]

being a 160 amp welder .030 wire works about best

The 200 is 160 @ 35% duty cycle. It's rated at 200.

[fdcmiami]

that weld would pass anywhere. running along the side might take a little more practice but there's nothing wrong with what you've got. problems arise sometimes when you increase the size of the tubing and the radius on the corners increases also. you'll find a single pass may be ok where the pieces meet at a ninety but you may have to lay in several depending on size of radius. the more steel you work with the less you'll pick up that tig torch.