Noob has questions.. Sorry

[Machin3]

You've achieved a large cold lap on the above weld showing very little fusion on the bottom plate.
It's a typical cold Mig weld where you've weaved and slowed down on the travel to compensate for the lack of power.
I would not be surprised if that's very weak. Thickness like that needs 250 amps blasting down it in a straight line. Weld toes should smoothly flow at both sides of the fillet. Yours are prominent and act as stress risers. Sometimes we don't always get smooth toe transition as welded but we should at least be blending them up afterwards with a grinder.
Turn up the juice to start.

Does the same go for this attempt??

Cheers

 

[Richard.]

Sorry but yes.
It looks a cold weak joint.
Excessive weld metal, poorly blended toes. Lots of weaving going on. You shouldn't see freeze frames like that in a mig run unless your going up in dip transfer.
You need to be firmly in spray for that.

 

[Machin3]

Sorry but yes.
It looks a cold weak joint.
Excessive weld metal, poorly blended toes. Lots of weaving going on. You shouldn't see freeze frames like that in a mig run unless your going up in dip transfer.
You need to be firmly in spray for that.

Thanks again,
Being new i dont understand alot of your terminology, bit of googling in order i think, will try again monday and see what happens,

 

[Richard.]

Some more amps and volts on order and you'll have much better results.
It's thick stuff by the look of it so don't be frightened to unleash the units capabilities on it.
Your ability to go down it in a consistent fashion seems fine. The weld looks straight and steady you just need to dial it in for the job.

 

[backpurge]

Richards comments are spot on, I would also avoid weaving For the moment

 

[Machin3]

Thank you all
Just hope im playing with simular materials, Will let ya know monday :-)

 

[Machin3]

Ok, ive tried a few runs today on different heats, they run left-right, hottest to coolest.. And the last picture is same heat but slightly higher wire speed,
Would be very grateful if you guys can see any improvement over the last pics,


Thanks for ya time

 

[backpurge]

Would say from the photos middle right looks best, spatter levels a bit high on the following welds

 

[Richard.]

Middle right looks a peach.
No spatter. And looks weld fused.
The bottom 2 look pretty good runs too.
EDIT back purge beat me to it.
Glad I picked the same one as the best of bunch.

 

[Machin3]

Wonderful, thanks guys,

The settings you chose incidently are the ones ive used since day one, on this particular size material, so thats great. Ive got another 20 to do tomorrow so i know to go back to normal settings, thanks again guys :-)

Sure i will be back with more questions soon

 

[backpurge]

One thing you could try is leave your wire speed the same as the last two and turn the volts up a tad and move a wee bit faster just to see what happens

 

[Machin3]

Righteo, will give it a go, :-)

 

[Richard.]

That's a good call. It will take you that little bit further into spray transfer which will help keep the excessive spatter down. Another volt could transform them to very nice clean runs.

 

[Machin3]

Ok guys back with more requests, had the opportunity to run a few vertical ups and downs today, would appreciate it if you guys could cast your eyes over,

I was having trouble with the ups... Spatter kept landing on the top of my head and puttin me off lol, i didnt stop though... Pushed through it haha, if anyone has any tips would appreciate it,

Thanks :-)

 

[backpurge]

I would avoid vertical down MIG on this thickness material, might look pretty but it is very rare there is any strength in it until you really are at the top of your game

 

[Machin3]

I would avoid vertical down MIG on this thickness material, might look pretty but it is very rare there is any strength in it until you really are at the top of your game

If i avoid the process then i feel im not going to learn how to get to top of my game, unfortunately im having to learn while doing :-(

 

[Richard.]

If i avoid the process then i feel im not going to learn how to get to top of my game, unfortunately im having to learn while doing :-(

Go up. You'll learn much more.

 

[Machin3]

Go up. You'll learn much more.

Ok, any opinions on the up weld? (1st pic of latest post)

 

[Richard.]

No not really.
They seem to all look pretty decent. Keep practicing.

 

[backpurge]

For a first go at vertical up that really is very good.