What welding projects are you working on? Are you proud of something you built?
How about posting some pics so other welders can get some ideas?
Wolfpack3
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    Wed Aug 26, 2020 12:20 am

I am in the process of welding up a weathervane with 16oz copper sheet with de-oxidized copper rod with my syncrowave 250 and wondered if anyone has any experience in doing this...settings,electrode etc?
Thanks
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Welcome to the form
That's pretty thin sheet, I haven't welded (TIG) this gauge but have done copper, perhaps a silicon bronze filler would be best as you don't need a lot of structural strength

Do you have a pic of what you're doing?
Richard
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Wolfpack3
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    Wed Aug 26, 2020 12:20 am

Richard,
Thanks for the reply! I have welded with deoxidized copper before with good results but it's been a long time ago.
This is one I did a few years ago.
5lb bass
5lb bass
IMG_4035.jpg (51.17 KiB) Viewed 1007 times
Poland308
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    Thu Sep 10, 2015 8:45 pm
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Start out around 30 amps. Use a foot control or thumb wheel. You might need to bump the max up 5 amps at a time or so to find a good puddle point. Depending on overall mass copper can pull heat away pretty fast , so it may take more than you think. But after it gets hot it may take much less. That’s where the rheostat comes in.
I have more questions than answers

Josh
Poland308
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I have more questions than answers

Josh
BugHunter
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    Sun Apr 19, 2020 12:54 pm

The numbers on that chart look a little more like what I was doing. My amps were pretty high because I couldn't even get a puddle started at low current.

I have 20 oz copper because I used it for flashing on my chimneys. I just played around with some of the pieces and had fairly decent luck with welding it but I did put a lot of heat in the part which anneals the material something terrible. If I had more time to play with it I would probably get some of that water putty stuff that you used to sink heat out of your part. There's got to be a better way than what I was doing. I used clean Romex as my filler rod. 14 gauge. Straight argon and DC at I want to say 100 to 150 amps but it's been a while so I don't remember.
BugHunter
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    Sun Apr 19, 2020 12:54 pm

If I were to do it again I would do very short areas and allow a lot of cooling between. Copper heats up something terrible when you weld it.
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