Thin metal welding with miller mpi220p

[jacob6u]

Hi
What is the best way to weld thin metal profile (2mm) without burn it throgh.
I am using 1 mm wire with 80/20 mix

What are the suggested setting .
Some told me to increase the material thickness to 3.2 mm even though I'm working with 2 mm

Haim

[ryanjones2150]

Don't weld it too hot or for too long. <br />
<br />
That was easy. Next question.

[cruizer]

Thought to change the gas to 75 25, though, had a looksee, being a newer machine and all. Are you in pulse mode, as thats what its designed for is sheet metal. Eliminates the warpage and keeps the plate reasonably cool

[jacob6u]

I am using Miller MPI 220p<br />
I will give it a try <br />
<br />
Haim

[H80N]

Hi
What is the best way to weld thin metal profile (2mm) without burn it throgh.
I am using 1 mm wire with 80/20 mix

What are the suggested setting .
Some told me to increase the material thickness to 3.2 mm even though I'm working with 2 mm

Haim

See page #42 of your manual.... looks like there is ALREADY a preloaded program/parameters in memory

https://www.millerwelds.com/files/ow...53918F_MLN.pdf



BTW... where are you located... that model has not been available here in the US

[old jupiter]

Did I miss something? I think 80/20 wire is better than 75/25 for burn-through, and 85/15 or 90/10 better yet. S-3 wire at .030" (1.5mm) with C-15 (85/15) works for me for thin sheet steel.

[jacob6u]

Hi<br />
<br />
As the machine has an auto setup or preloaded programs, of course I used it <br />
however still I get those burns...

[jacob6u]

Further on the the machine it there is a sticker with all the programs that can be used.

[H80N]

Further on the the machine it there is a sticker with all the programs that can be used.

The programs on the chart shown on page #42 should get you close.... the rest will follow with practice and fine tuning of the settings

Each operator has differing speed and quirks in their techniques... so none of the canned programs will be prefect for everybody.... So... you must adjust your technique... AND...Practice... Practice... Practice...

[ryanjones2150]

You guys were way more help than I was. I feel dumb.

[jacob6u]

Hi guys <br />
Thank you all for your help.<br />
No doubt it all about practice