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7018 on AC

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Re: 7018 on AC

Postby Farmwelding » Sat Apr 22, 2017 7:55 pm

Well... Either way it wouldn't go in our machine for some reason. I used both the high and low side and changed the amps around and nothing went. So now all I have to do is hope we can get a DC stick welder.
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Re: 7018 on AC

Postby MinnesotaDave » Sat Apr 22, 2017 10:13 pm

Went out and made about 8 passes for you on AC.

1/8" 7018, old rod not in oven, welded fine from 135-150 amps AC.
135 amps for vertical up.

5/32" 7018, 150 amps AC.

Only real issue is getting it lit. Then you're golden.
"Pool cue" it for strike acuracy and to warm it up.

First welder I bought (1995) - after an oxy/acetylene that is.
image.jpeg
image.jpeg (45.82 KiB) Viewed 253 times


Nothing special, about 8 passes, maybe more.
2 rod sizes, flat and vertical up.
image.jpeg
image.jpeg (50.94 KiB) Viewed 253 times
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Re: 7018 on AC

Postby Farmwelding » Sat Apr 22, 2017 10:26 pm

MinnesotaDave wrote:Went out and made about 8 passes for you on AC.

1/8" 7018, old rod not in oven, welded fine from 135-150 amps AC.
135 amps for vertical up.

5/32" 7018, 150 amps AC.

Only real issue is getting it lit. Then you're golden.
"Pool cue" it for strike acuracy and to warm it up.

First welder I bought (1995) - after an oxy/acetylene that is.
image.jpeg


Nothing special, about 8 passes, maybe more.
2 rod sizes, flat and vertical up.
image.jpeg

What do you mean pool cue the electrode. Never heard that term.
A student now but really want to weld everyday. Want to learn everything about everything. Want to become a knower of all and master of none.
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Re: 7018 on AC

Postby MinnesotaDave » Sat Apr 22, 2017 10:54 pm

Pool cue means to hold the rod with your other hand down low near the steel.

Gives you fine motor control of the tip so you can control it precise enough to get those rods lit and warmed up on AC.

Otherwise they will often stick and not light.
Dave J.

Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~

Airco 300 - Syncro 350
Invertec v250-s
Thermal Arc 161 and 300
MM210
Dialarc
Tried being normal once, didn't take....I think it was a Tuesday.
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Re: 7018 on AC

Postby Farmwelding » Sat Apr 22, 2017 10:56 pm

MinnesotaDave wrote:Pool cue means to hold the rod with your other hand down low near the steel.

Gives you fine motor control of the tip so you can control it precise enough to get those rods lit and warmed up on AC.

Otherwise they will often stick and not light.

That makes a lot more sense than what i thought it meant. Maybe will give it a go on Monday.
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Re: 7018 on AC

Postby AndersK » Sun Apr 23, 2017 6:13 am

Farmwelding wrote:. Maybe will give it a go on Monday.


Just make sure you have a proper glove rated for stick on.
Don't ask..... ;)
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Re: 7018 on AC

Postby Farmwelding » Sun Apr 23, 2017 7:24 am

AndersK wrote:
Farmwelding wrote:. Maybe will give it a go on Monday.


Just make sure you have a proper glove rated for stick on.
Don't ask..... ;)

Don't worry I know why. I accidentally grabbed one somebody had just used for ab1/2" weld with my bare hand the other day and practically melted my hand off.
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Re: 7018 on AC

Postby AndersK » Sun Apr 23, 2017 11:11 am

He he , no you don't ;)
You can easily hold a used rod with a tig glove but don't pool cue with one. The radiation from the arc is strong enough to give blisters thru a tig glove without even touching any metal. :mrgreen:
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Re: 7018 on AC

Postby MinnesotaDave » Sun Apr 23, 2017 11:58 am

AndersK wrote:He he , no you don't ;)
You can easily hold a used rod with a tig glove but don't pool cue with one. The radiation from the arc is strong enough to give blisters thru a tig glove without even touching any metal. :mrgreen:


Really he should only do this to get it started and warmed up, and then drop his hand back to the stinger in a few seconds.

The start can be really difficult with an AC buzz box.

The Century that I pictured starts them really good on DC in comparison.

If he masters arc starts on AC with that rod, he'll laugh at the simplicity of starting on DC :D
Dave J.

Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~

Airco 300 - Syncro 350
Invertec v250-s
Thermal Arc 161 and 300
MM210
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Re: 7018 on AC

Postby Popeye the old miner » Sun Apr 23, 2017 5:33 pm

I did some work in an old coal breaker about 40 years ago, all they had was an old ac welder, I couldn't even guess who made it, someone said Westinghouse built it back in the 30s, but no one knew for sure as there was no tag of any kind on it. Anyway they busted the shaker frame, it was made out of heavy 8 inch c channel might have been 3/8 thick or better when it was new. They called me up to do it since I'm a skinny little shit and no one else could fit under the shaker. One thing about coal...it corrodes steel like crazy...sulfuric acid eats it up and what is left is very difficult to weld with a good machine let alone an old antique buzzer from the stone age. They said just get it together so it will run til Friday and we will replace it Saturday...bullshit...I know how miners are I am one, they will keep fixin it til there is more repair weld metal than original steel.

So I got the ol thing all lined up, dogged in place, grinded somewhat shiney and turned on the beast, crawled in side and under the shaker with a handful of 6011s and a handful of 7018s. Uriah the old bird who ran the shaker told me let me know where you want it set at I will turn it where you want it. Ok I said. I fussed a bit with some 1/8 inch 6011s til it ran good and got some steel into the shallow groove I cut with the grinder then slid out and did the same on the outside and on the flanges, then went down to the other end and repeated the process. Meanwhile I heard some smartass remarks we'll find out if this kid can weld, if he can with this ol beast we'll hire the little shit. Now one thing I learned a long time ago about 7018 rods...the next size smaller 7018 will run at just about the same setting as the larger 6011. So now I'm gonna burn 3/32 7018 over top of the 6011 root I didn't have much trouble getting it going, and I will admit I thought it was gonna be a fight but they lit up pretty quick, maybe it was the coal dirt on em who knows. Anyway it stayed together and eventually after 3 or 4 years after fixing various places on both sides of the shaker once a month or so we cut it up and built a whole new shaker water bay, got a new set of cams and bullrigged the whole damn thing in place.

Got hired on full time 2 days after that first repair and never looked back. Don't ever let anyone tell you that you cant do somethin, you never know until you try it for yourself
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