Weld critique please
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Shield Arc
Super Member
Are you on the correct polarity, for that wire?
How much stick out, are you welding with?
How much stick out, are you welding with?
Shield Arc
Super Member
I generally run about 3/8" to 7/16" stick out. I think your running to much gas. I never heard of that wire. So I looked it up. I don't know how to convert that to CFPH.
http://www2.hyundaiwelding.com/jp/product/eng_welding/pdf/SM-70.pdf
http://www2.hyundaiwelding.com/jp/product/eng_welding/pdf/SM-70.pdf
Shield Arc
Super Member
WOW! That seems very high to me. But Like I said, I never heard of that wire. With C-25 I run about 15-18-cfh.
Your fillet weld, the plates don't look to bad, but the flat plate, I would clean better.
You may try turning the voltage down some too. Without being there to hear the weld, hard for me to help much.
Your fillet weld, the plates don't look to bad, but the flat plate, I would clean better.
You may try turning the voltage down some too. Without being there to hear the weld, hard for me to help much.
MinnesotaDaveChalmers
Platinum Member
I'm confused by 400ipm at 105 amps. Those numbers don't appear to agree.
What wire size?
The chart link does not list 90/10 as a recommended gas.
What wire size?
The chart link does not list 90/10 as a recommended gas.
LD1
Epic Contributor
Not familiar with the amps setting either. I'm no pro, but have welded with many welders. Never an amp setting. Only voltage and wire speed. For 300ipm, should like somewhere between 21-24v for short circuit welding with most of the machines I'm familiar with.
Flat plate is too rusty. Might likes clean.
And agree, 35cfh is a waste of gas. 15-20 is usually plenty. So the gas maybe your issue, if it isn't, it's just wasting gas.
Flat plate is too rusty. Might likes clean.
And agree, 35cfh is a waste of gas. 15-20 is usually plenty. So the gas maybe your issue, if it isn't, it's just wasting gas.
Gary Fowler
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I am not a MIG expert by no means, but 50 CFH is way to high and could be the cause for the rough weld. Think white capping on a lake from high winds which is what you are doing to the weld puddle with that kind of gas flow.
The porosity is for sure caused by all the rust you are welding over. You have to clean rust completely before welding as just a small speck will cause porosity and lots of it. I am a champion of cleaning the weld area of all contaminates prior to striking the first arc regardless of the process used. Lots of hobby welders think stick rod with a 6010 /6011 rod doesn't require cleaning but that is not the case. You may get by a little more by not cleaning with stick rod, but you will suffer the pain of more sparks, some porosity. ugly welds and generally harder to make tie ins when the metal is dirty. The few minutes spent cleaning the weld area will pay dividends in ease of welding and better quality welds.
SO lower your gas flow to 15-20 CFH, clean the rust completely first then you can work on setting the machine a little better.
The porosity is for sure caused by all the rust you are welding over. You have to clean rust completely before welding as just a small speck will cause porosity and lots of it. I am a champion of cleaning the weld area of all contaminates prior to striking the first arc regardless of the process used. Lots of hobby welders think stick rod with a 6010 /6011 rod doesn't require cleaning but that is not the case. You may get by a little more by not cleaning with stick rod, but you will suffer the pain of more sparks, some porosity. ugly welds and generally harder to make tie ins when the metal is dirty. The few minutes spent cleaning the weld area will pay dividends in ease of welding and better quality welds.
SO lower your gas flow to 15-20 CFH, clean the rust completely first then you can work on setting the machine a little better.
