Under cut

[F124nny]

how to stop under cut.

Thanks guys

 

[dan.taylor.1]

He correct current and rod angles need to be used. Can't say more than practice practice practice.

 

[Arclikeharrypotter]

As what Dan said, but different joints will require a slight different technique also.

 

[F124nny]

Thanks guys.

Could speed be a problem as well

 

[Arclikeharrypotter]

Yes that will more than likely give undercut, is this just a general question or us there a specific joint that you are having issues with undercut?

 

[Sarto]

Is a photo available?
The experts could tell much more, seeing the problem.

SARTo

 

[Kent]

Short arc length, pause slightly if your not running through free of any weave. Then if these don't fix it drop power and or or rod size for the joint.

Flarery long arcs creating lots of spatter will give you a nasty undercut weld everytime.

Can't say more without knowing more

 

[F124nny]

I'll get some pictures. And it's with everything arc and tig. I found it when I was doing a flange on 4" and Tee joint

 

[Kent]

Your undercutting on everything then you need to get lessons and stick to one prosess till you have iron cracked.
Best advice is perhaps is I guess you are running them all too hot, it's quite hard to get bad undercut with mig

 

[Arclikeharrypotter]

Ditch the flanges practice, flat, vertical and overhead fillet get them nailed, they are your bread and butter.

As for your undercut Kent is correct could be to much juice, travel speed or even rod angle. Be interesting to see some pictures.

 

[F124nny]

Yeah I got it on mig but mainly arc and tig

Your undercutting on everything then you need to get lessons and stick to one prosess till you have iron cracked.
Best advice is perhaps is I guess you are running them all too hot, it's quite hard to get bad undercut with mig

 

[nickk]

rod angle would be my first culprit,especially if you have 2 different thicknesses.

 

[Sarto]

Different thicknesses, and undercut.
That happens almost always to me.

 

[backpurge]

Poor technique, wrong parameters etc etc

 

[F124nny]

I'm in Warrington.

Thanks for the info I'll keep practicing the T joint and work on that first

 

[123hotchef]

Do you give any trainning Brad?

 

[F124nny]

Thanks brad I'll check them out