Welded a Cat 650 Dozer stack (MIG)

[k0ua]

Thanks guys I ordered it.

Woo hoo! Now you are cooking!:thumbsup:

 

[dragoneggs]

I seriously considered the 200 Multimatic before settling on the 211 MIG. Figured I would save some serious $$$, learn one method and hopefully get good at it before moving to TIG. I am jealous.

 

[k0ua]

We want to see your first little "TIG worms" when you get it set up... No practicing all day now

 

[Sawyer Rob]

Welded a Cat 650 Dozer stack (MIG)

Where's the CAT?? All I see is a John Deere??

SR

 

[Sodo]

That's funny I never noticed that!

 

[Shield Arc]

Is the Miller 200 limited to DC only? If so you could always pick up a bottle of helium, to weld aluminum. This is the results I got with my import DC only import SMAW welders. No foot pedal, which really makes life easy when Tig welding aluminum!

 

[Mysfyt]

Is the Miller 200 limited to DC only? If so you could always pick up a bottle of helium, to weld aluminum. This is the results I got with my import DC only import SMAW welders. No foot pedal, which really makes life easy when Tig welding aluminum!

Does the tungsten tip stay sharp with DC? What tungsten did you use? Might want to try this.

 

[Shield Arc]

I've got to the point where all I use is 2% ceriated tungsten. And yes it stays sharp all the time.

 

[muddstopper]

You using the 2% ceriated tungsten for steel, aluminum and stainless?

 

[Shield Arc]

You using the 2% ceriated tungsten for steel, aluminum and stainless?

Yes.......

 

[CNC Dan]

I've got to the point where all I use is 2% ceriated tungsten. And yes it stays sharp all the time.

I've done the same with2% lanthenated. Been meaning to try ceriated.

 

[Sodo]

Ditto. That is going to be miserable to run with the exhaust coming out of the holes.

Dusty that's not how it worked out. Even when he Rolls Coal , nothing comes out the slits.

Happy to finally get time to make this clearing. 4 hours later it's like getting free land!

 

[MtPockets]

Looks like good!

 

[Sodo]

I've got to the point where all I use is 2% ceriated tungsten. And yes it stays sharp all the time.

I've done the same with2% lanthenated. Been meaning to try ceriated.

I got BOTH. LWS guy said the grey is recommended with my inverter machine, and the TIG kit came with 3 greys, 3/32". Cant remember if grey is lanthanated or ceriated. LWS said the differences are very subtle.

I have everything except my MultiMatic is 100 miles away. Any tips on the best YouTube to start with?

 

[Mysfyt]

Welding Tips and Tricks - TIG, MIG, Stick and a pantload of other info

I would start here. Some of the best welding videos out there.

 

[Shield Arc]

Any tips on the best YouTube to start with?

A guy with your superior welding skills should not mess around with rudimentary Tig welding. Jump right into open root pipe.
https://www.youtube.com/watch?v=2chtZErrZzg
https://www.youtube.com/watch?v=cGoybWZjSis

 

[CNC Dan]

Welding Tips and Tricks - TIG, MIG, Stick and a pantload of other info

I would start here. Some of the best welding videos out there.

+1

He has the welding skills AND video skills.

 

[Silvic]

A guy with your superior welding skills should not mess around with rudimentary Tig welding. Jump right into open root pipe.
https://www.youtube.com/watch?v=2chtZErrZzg
https://www.youtube.com/watch?v=cGoybWZjSis

SA
Yes I know you are not a pipe welder but.........
The first video of the 2G by Welders Lens (Treadway) looked like he had a very thick land on the pipe. I would have expected to see a bit thinner land on that. Not a knife edge, but that looked more than I expected. Maybe an optical illusion what is your opinion?
Thanks

 

[Shield Arc]

I use about 1/16" land, and a 7/64" drill bit to set the gap. I use 1/8" filler for the root pass. I use 3/32" filler for the hot pass. I do not go up more than 10-amps for the hot pass! This helps prevent suck back! I run about 95-amps. With a very long sharpened tungsten. Most of the time I use the lay rod technique, but I have been known to dip the filler too.

 

[Sodo]

Always thought I'd watch videos but never could really pay attn to TIG because I had no EQPT to apply it to. Man those guys are GREAT teachers. Really looking forward to TIG. I've done a lot of gas-welding (but not in 20 years) and always wanted a TIG. Wish I could wind the clock back and get a TIG 20 years ago.

One thing that struck me is that this TIG puddle (& bead) appears to have a very little "penetration" into the parent metal. It seems to me (on a theoretical level) like all you'd have to do is penetrate one molecule into the crystalline structure, and two pieces become one (ignoring flaws for the moment). I understand there can be a grain structure that differs at the edge of the melt. But what is it - that is different - between a low-power MIG weld and this tiny TIG root weld? Isn't this guy welding with 95A? That's not a lot of power going into that parent metal.

I have no doubt this is stronger, and better result. But what's the deal with penetration? Does penetration come into focus with MIG simply because MIG is crude and un-controlled?

This is probably too much detail to discuss in a thread called …..dozer stack (MIG)