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Unread 05-25-2013, 12:56 PM   #1
StrokedWJ
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Ugly Welds...help?

Its been a year or so since I needed to use my welder and in that time I got sold my Lincoln 180 and am now using a Hobart 187. I can't seem to get the hang of the Hobart. I've got ugly tacks with craters. I've checked polarity and its correct according to the sticker inside the door. 1/8" steel, cleaned, Pwr. lvl 5, wire speed 50, ~20cfm 25/75 gas.




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Unread 05-25-2013, 02:28 PM   #2
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Kinda looks like you forgot to turn on the gas or ran out of gas ? Maybe a breeze blowing away your shielding gas.

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Unread 05-25-2013, 02:43 PM   #3
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Yea youre losing your shielding, you need to turn up the flow or take the piece inside. You may also have some rusty wire causing some of the perosity.
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Unread 05-25-2013, 03:50 PM   #4
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Like said above looks like poor sheilding or wind. I have a weldmark 187. Try 3/40 with about 15-20cfm.
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Unread 05-26-2013, 04:05 PM   #5
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See if you even getting gas to the nozzle first, undo the roller off the wire feed so wire don't feed out and hit the trigger and listen for gas flow at the nozzle.
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Unread 05-26-2013, 04:17 PM   #6
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Thanks for the replys. I'll look into the gas issue. I could see the regulator needle moving when I'd push the trigger. It was definitely a little windy too.
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Unread 05-26-2013, 07:35 PM   #7
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What I do before I start doing my first weld of the day, is I undo the rollers on the wire, pull the trigger for a few seconds to clear the tube of air so that it's all full of the mix gas. Then I pop the roller back on and start welding. Before I started doing that, every now and then my first weld would look ugly and pitted like that. But even so, after a few seconds of welding the gas should fill the tube. Definitely check to make sure gas is coming out. And yea, a little bit of wind will carry it away :-\ I try to do all of my welding just inside my garage, 4 feet or so. That usually does the trick. If I have to weld on the jeep outside, I just wait until I don't feel any wind, then go.
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Unread 05-27-2013, 01:23 AM   #8
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Quote:
Originally Posted by StrokedWJ
Thanks for the replys. I'll look into the gas issue. I could see the regulator needle moving when I'd push the trigger. It was definitely a little windy too.
The needle on the regulator doesn't tell you if your getting gas at the nozzle. If the gun lead is not plugged into the machine all the way the gas will just diffuse into the machine, if the O rings are shot then it will do the same thing.

It takes 2 seconds to open the machine & lift the roller tensioner off to keep wire from feeding into your ear while you listen for gas.
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Unread 05-27-2013, 02:28 AM   #9
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Quote:
Originally Posted by StrokedWJ
Its been a year or so since I needed to use my welder and in that time I got sold my Lincoln 180 and am now using a Hobart 187. I can't seem to get the hang of the Hobart. I've got ugly tacks with craters. I've checked polarity and its correct according to the sticker inside the door. 1/8" steel, cleaned, Pwr. lvl 5, wire speed 50, ~20cfm 25/75 gas.

It looks like the heat maybe too hot, and when you finish your puddle, or your wide weave you long arc. From what I have been told, you want to maintain about a 1/8" gap from weld to tip. When you're doing puddle welds I will circle the puddle once and pull straight up and out. You don't want to move slow at the end or you will long arc and burn a hole in your piece.
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Unread 05-27-2013, 10:41 AM   #10
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Quote:
Originally Posted by wushaw View Post
The needle on the regulator doesn't tell you if your getting gas at the nozzle. If the gun lead is not plugged into the machine all the way the gas will just diffuse into the machine, if the O rings are shot then it will do the same thing.

It takes 2 seconds to open the machine & lift the roller tensioner off to keep wire from feeding into your ear while you listen for gas.
Just checked and I do have gas at the nozzle. Thanks for the suggestion on how to check.
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Unread 05-27-2013, 10:17 PM   #11
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Quote:
Originally Posted by StrokedWJ

Just checked and I do have gas at the nozzle. Thanks for the suggestion on how to check.
It's porosity. Don't weld with gas in wind. You can fart and it will blow it away. I you are welding outside crank the gas. When I weld inside I and at 34-36cfm. A little more gas beats a weak weld with porosity in it. An having to grind out the bad weld.

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Unread 05-28-2013, 06:29 AM   #12
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I run at most 15-20 inside,and maybe 25 outside ,it doesnt matter how high it's set outside,if the wind blows it's goin to blow away your sheilding and cause porosity.

Check the O-rings and possible cuts or holes and flat spots or kinks on your whip hose.
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Unread 05-28-2013, 10:22 AM   #13
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Quote:
Originally Posted by Ironworker709 View Post
I run at most 15-20 inside,and maybe 25 outside ,it doesnt matter how high it's set outside,if the wind blows it's goin to blow away your sheilding and cause porosity.

Check the O-rings and possible cuts or holes and flat spots or kinks on your whip hose.
X2 15 to 20 is more than enough with 75/25.

Honestly knowing that welder it was too hot for power plus possible wind issues.
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Unread 05-31-2013, 02:22 AM   #14
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I have had an exhaust fan blow away my shielding gas. Thats why I stick weld, no shop or garage and a gravel driveway is all I have.
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Unread 06-03-2013, 02:59 AM   #15
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1 no shielding gas 2 don't run above 15-20 max 25. That's what I used while In Iraq while In sand storms. 3 use a shielding blanket if there is to much wind.
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