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Hello from Delaware, OH

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Hello from Delaware, OH

Postby chrisknight » Sun Jul 16, 2017 7:27 pm

Hello!
On a random Friday within the last few weeks I just got the urge to learn to TIG weld. I was driving around 270 and I stopped in a shop that sold argon and welders just to check things out. I left with a rather large tank of argon and a Lincoln TIG 200, some 1/8" electrodes, steel filler, and got some scrap steel. I'm going to learn to TIG weld if it kills me. :) Got a hood from Amazon, gloves, etc... So, I can't weld. Hahaha! I have reground my purple electrode about 30 times and I can never seem to get the puddle going, ever. I also do stained glass and for some reason am expecting the puddle to just flow down the fluxed copper foil like solder. The ark starts fine and the gas is about 12 CFH, I think. The gauge that comes with the TIG200 kind of sucks. I'm looking for a flow meter if anyone has any tips. I try to heat up both sides of 1/8 mild steel on top of 1/8 mild steel at 95 amps and the puddle never comes. Torch on negative and set to DC and no pulse. I add more foot pressure and I blow a hole right though. Sigh. I'm thinking about taking a class someplace or at least hanging out with some good TIG guys. Regular job is IT/Networking/PBX but I'm pretty good with my hands. However, my TIG welds look like some guy is stick welding while doing one handed jumping jacks. My brother used to MIG weld for Honda and I have done that with success. I seriously suck at TIG. Hoping to learn new things here.
Came across this site from watching (Jody?) youtube videos. Seems like I could learn a ton here.
Thanks,
Chris
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Re: Hello from Delaware, OH

Postby Artie F. Emm » Mon Jul 17, 2017 7:26 am

Welcome, Chris!

Just for future reference check out the Miller TIG calculator, here:
https://www.millerwelds.com/resources/w ... calculator

First, check out this video, very helpful.
http://www.weldingtipsandtricks.com/wel ... -2013.html

According to that calculator your amps and argon are in the range. If i can suggest, leave the filler out at first, and just work on starting and advancing the puddle. Start with bright shiny steel, i.e., grind off any rust or mill scale, and wipe down with acetone.

I wouldn't worry about replacing the flowmeter just yet, it's more than sufficient to the task. I am wondering why you can't start a puddle... how much distance between tungsten and your workpiece?
Dave
aka "RTFM"
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Re: Hello from Delaware, OH

Postby Mike » Mon Jul 17, 2017 8:00 am

Chris, welcome to the forum.
M J Mauer Andover, Ohio

Linoln A/C 225
Everlast PA 200
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Re: Hello from Delaware, OH

Postby chrisknight » Mon Jul 17, 2017 10:08 am

Mike wrote:Chris, welcome to the forum.


Thanks!
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Re: Hello from Delaware, OH

Postby chrisknight » Mon Jul 17, 2017 10:10 am

Artie F. Emm wrote:
According to that calculator your amps and argon are in the range. If i can suggest, leave the filler out at first, and just work on starting and advancing the puddle. Start with bright shiny steel, i.e., grind off any rust or mill scale, and wipe down with acetone.

I wouldn't worry about replacing the flowmeter just yet, it's more than sufficient to the task. I am wondering why you can't start a puddle... how much distance between tungsten and your workpiece?


I'll try to grind it so it's shinny. I'm having a hard time seeing where the tip is in the glow. I'm sure I'm too far away, but every time I try to get close, I dip it because I can't see it. I'll try again tonight.
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Re: Hello from Delaware, OH

Postby Artie F. Emm » Mon Jul 17, 2017 12:32 pm

chrisknight wrote: I'm having a hard time seeing where the tip is in the glow.


Auto dark hood? Can you adjust the darkness upward?
Dave
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Re: Hello from Delaware, OH

Postby chrisknight » Tue Jul 18, 2017 6:52 am

Artie F. Emm wrote:
chrisknight wrote: I'm having a hard time seeing where the tip is in the glow.


Auto dark hood? Can you adjust the darkness upward?


Yeah, it's auto darkening. If I go any lighter, it's too bright.
I did get two pieces of scrap steel 1/8" and ground them shiny. I tried to weld with no filler and it did seem easier to manage. The weld wasn't great but was acceptable by comparison. I noticed the top edge of the top piece melted very quickly and then melted about 1/16" back and it was this top plate melting that caused the bottom to start to melt. I was trying to hold the torch on the bottom seam the whole time.
What I expected to happen was for the bottom piece start to melt, then they both start to melt right at the seam, which is where I'm trying to hold the heat. The end result was a weld, so I guess I can't complain but it is far back from where I started because of the top melting back and away and while it looks a bit better, still is not what I'd hoped.

Where are you guys trying to aim the torch?
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Re: Hello from Delaware, OH

Postby Artie F. Emm » Tue Jul 18, 2017 10:06 am

chrisknight wrote:If I go any lighter, it's too bright.

I was thinking you might increase the darkness, so the arc would not dazzle you, and you would have better visibility of the tip of the tungsten.

Here's a couple clips from the Miller TIG Handbook that show torch angles. It also gives an idea of holding the distance between the torch and the work piece. In the first one I added the red arrow to show weld direction.

Miller's TIG Handbook is no longer available online- Miller removed it with a vague promise to replace it but to my knowledge that has not yet happened. While it does need some tight editing it's still a useful reference- happy to share it with anyone that wants a copy.

tig1.jpg
tig1.jpg (76.57 KiB) Viewed 194 times
tig2.jpg
tig2.jpg (26.95 KiB) Viewed 194 times
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Re: Hello from Delaware, OH

Postby chrisknight » Tue Jul 18, 2017 6:38 pm

Artie F. Emm wrote:
chrisknight wrote:If I go any lighter, it's too bright.

I was thinking you might increase the darkness, so the arc would not dazzle you, and you would have better visibility of the tip of the tungsten.

Here's a couple clips from the Miller TIG Handbook that show torch angles. It also gives an idea of holding the distance between the torch and the work piece. In the first one I added the red arrow to show weld direction.

Miller's TIG Handbook is no longer available online- Miller removed it with a vague promise to replace it but to my knowledge that has not yet happened. While it does need some tight editing it's still a useful reference- happy to share it with anyone that wants a copy.

tig1.jpg
tig2.jpg


That IS extremely helpful! Thank you! Wouldn't mind having a look at that book. So, about how close do you all hold your tip away from the work piece?
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Re: Hello from Delaware, OH

Postby Artie F. Emm » Tue Jul 18, 2017 9:28 pm

The rule of thumb for arc length is "the diameter of your electrode".

The Miller Handbook is in PDF format, compressed into a zip file. Send me a PM with your email address and i'll send it.
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