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[BRAD] What's up, guys?

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My name is Brad.

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Welcome back to another video.

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If you're new to this channel,
we talk about welding and

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fabrication, CNC machining,
some Fusion 360 stuff,

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and we're gonna dive into
some really cool projects.

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So if that sounds like fun,
hit that subscribe button.

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On this week's video,
we travel out from Colorado

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to Utah to talk with Joel and
his crew at Overkill Racing and

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Chassis about how to lay down a
beautiful open corner MIG weld.

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I'm gonna pass you over to
Joel, Rodrigo, and Alex Brown.

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These three guys are gonna give
you the tips and tricks, the

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techniques to be able to make
this possible for you at home.

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So stay tuned,
hit that like button,

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let's get into it.

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[JOEL] One of the most common
questions that we get is how

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do we make our MIG welds
look the way that we do?

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What we're gonna do today
is we're gonna answer those

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questions one by one.

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And it's not just a
one step solution.

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We've got our prep work.

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We've got the fit up itself.

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We got voltage settings,
and there's a couple other

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little techniques that you're
gonna learn from two of the

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best MIG welders that I know.

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When it comes to welding
in general, there's a lot

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of people that feel there's
a lot of trade secrets.

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When it comes to MIG
welding an open corner,

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what we're gonna do is pull
the layers of that onion back.

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We're gonna give you guys
all the tips and tricks that

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you need so you can weld
exactly like Rod and Alex.

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All right, guys, so here it is,
quarter inch open corner joint

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for your social media shots,
and you're looking to get

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something like this.

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We're gonna give
you all the tips.

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First things first,
if you look at this part,

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look at how clean it is.

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It's not a bunch of mill scale.

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It's not all dirty.

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Rod, what did you do to actually
clean and prep this part?

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[RODRIGO] First thing I
did was I hit all sides,

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I mean every single
side, with a DA pad.

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And then I took my
three-inch Roloc disc with

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a Scotch-Brite and cleaned
off all these inside edges.

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So there's no mill scale, which
just leaves a nice clean weld.

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[JOEL] Once you actually
get ready to weld the part,

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so we've got it all prepped up
and you got all the mill scale

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removed, settings and stuff.

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I mean, that's one of the
biggest misconceptions.

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You know, people are running a
real, real thick diameter wire.

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We're really only running
an.030 diameter wire,

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and it's a Lincoln
L56 ER70 S-6 wire.

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In terms of settings,
we're running roughly about

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18 volts, 18.5 volts, and just
around 200 inches a minute.

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And, uh, Alex, I mean,
I know you do a lot of

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pulse, um, spray work.

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If you were to be welding
this open corner, compared

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to the settings we would use,
how much would you change it?

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[ALEX BROWN] Um, well, as far as
the, the layout of the machine,

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it wouldn't be a voltage
and a wire speed.

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It would be a wire
speed and arc length.

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So the machine setup's
a little different.

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The mode of transfer's
quite a bit different.

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The technique itself is
actually pretty similar

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to what I do whenever I'm
trying to get that real,

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uh, nice stack of dimes.

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It's a really different
process from what I'm used to,

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and so I can't speak much to
the short arc aspect of it.

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But Rod did a really
nice job on these.

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These look as good as
I've ever seen from

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anyone, so I'm impressed.

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[RODRIGO] So if you look here,
you actually see that these open

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corners are tic-tacked together.

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And the reason I do that is
'cause when you're welding

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over it, you don't get these
massive lumps that just

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make your weld look ugly.

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So I start right here, and as I
come forward, I'm coming down,

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making sure my wire's in
the center of that joint.

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I come forward a little bit.

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I start coming up,
and as you come up,

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you see this silica
form, which is this, like,

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brown substance you see here.

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And as it forms,
you see that it

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gets darker.

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And as, as soon as you see
it gets darker is when you

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start your process all over.

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So with this Millermatic 252,
we are running.030 wire

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and 75% argon and 25%
CO2 as a shielding gas.

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So when I'm welding an
eighth-inch open corner

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joint, I will be around
16.5 volts and a wire

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speed of around 150 to 170.

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When I weld a quarter-inch
open corner joint, I am

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running 18 volts and anywhere
between 200 to 220 inches per

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minute for the wire speed.

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And this is with.030 wire.

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[JOEL] So what I'm gonna do here
for you is I'm actually gonna

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show a visual demonstration,
basically what Rod

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is talking about.

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So here we're gonna
use this piece that Rod

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welded on the back side.

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It's a quarter-inch open corner,
like he was talking about.

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And what we're gonna be doing
here is describing kind of

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what he was saying, but
actually on the table itself.

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So if we depict these lines as
being the throat of the weld,

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so basically the inside section,
and these two lines here being

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the toes, which are these edges,
these are really what you wanna

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focus on if you wanna have that
nice, consistent looking weld.

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So there's a couple of
different ways that you

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can go about doing it.

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Some people like to do what's
called a whip and pause.

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So what that is is you're
actually just moving the puddle

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straight in between the middle
of the throat and the toes,

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and you're pausing for a second.

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And what you're doing is
you're letting what's called

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the deposition rate fill up
the joint with filler wire.

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Once it's filled to make that
nice, clean-looking bead,

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then you pull back or whip,
and then you pause again.

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So as you pause again,
it's going to start

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stacking 'em up.

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So there's another technique
that people like to use,

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and that Rod actually used
specifically for this weld here.

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And it's essentially
doing a cursive E.

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So what he's doing is he's
working his way to the bottom

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of that toe and quickly
moving his way to the top,

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and then pausing just for
a brief second at the top,

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and then working his way
back down to the bottom,

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working his way back to the top,
and just repeating this all the

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way through the entire joint.

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And what that's gonna leave
you is this real nice,

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consistent looking weld profile.

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As long as your Es are
consistent every single

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time, your weld will
eventually look like this.

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[RODRIGO] Don't be discouraged
if you don't get it right away.

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[ALEX BROWN] Yeah,
I agree with that.

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There's, there's no secret.

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It's just practice.

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[JOEL] Guys, and just remember,
this is just a baseline.

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The numbers that work
best for Rod are gonna

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be different from what
works best for Alex that are

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definitely gonna be different
from what works best for me.

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So it's one of those that
this'll give you a great

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foundation, but ultimately,
with a little bit of practice,

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you'll be able to fine tune
your settings so that you

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can produce what Rod has been
producing this whole time.

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Guys, I hope this tip helps.

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Thanks for watching.

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If you learned anything,
hit that like and

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subscribe button.

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And until next time.