https://app.aws.org/forum/forum.plAmerican Welding Society Forum - General Welding Discussion15 Latest forum posts2024-01-16T14:26:01ZmwForumhttps://app.aws.org/forum/topic_show.pl?pid=288962Where did everyone go??8030562024-01-16T12:06:01Z2024-01-16T12:06:01Z6 Al]]>
https://app.aws.org/forum/topic_show.pl?pid=288958Where did everyone go??TimGary2024-01-05T20:37:55Z2024-01-05T20:37:55Z6 Some of us old guys still check this forum occasionally, but the most of the traffic moved to the new AWS Membership Forum. This link might get you there. If not go through the main AWS.org website.
https://membernetwork.aws.org/home]]>
https://app.aws.org/forum/topic_show.pl?pid=288957Where did everyone go??Lawrence2024-01-05T13:38:28Z2024-01-05T13:38:28Z6 The "Members" Forum gets a bit more traffic and has some nice features... Like you can cut and paste images right into the post. There is a more international group of posters which I also enjoy.
This forum is still the archive that my search engine hits on when looking up technical questions. It's a priceless archive.]]>
https://app.aws.org/forum/topic_show.pl?pid=288955Where did everyone go??jwright6502024-01-04T12:36:45Z2024-01-04T12:36:45Z6 https://membernetwork.aws.org/browse/allrecentposts]]>
https://app.aws.org/forum/topic_show.pl?pid=288954Where did everyone go??eekpod2024-01-04T11:56:15Z2024-01-04T11:56:15Z6https://app.aws.org/forum/topic_show.pl?pid=288953Where did everyone go??mcostello2024-01-04T03:13:19Z2024-01-04T03:13:19Z6https://app.aws.org/forum/topic_show.pl?pid=288952Where did everyone go??eekpod2024-01-03T19:08:02Z2024-01-03T19:08:02Z6
But now that I'm back on it where did everyone go? There aren't the usual number of conversations and Q+A that used to be here 6-10 years ago. What happened?]]>
https://app.aws.org/forum/topic_show.pl?pid=288940CAT D CLOSURE WELDHAFHARVARD2023-10-19T21:14:02Z2023-10-19T21:14:02Z0https://app.aws.org/forum/topic_show.pl?pid=288919Power supplies and gases for spray transferLawrence2023-10-02T13:03:58Z2023-10-02T13:03:58Z7 I'm just as perplexed as you are.
The fact of the matter is that in 2023 I know of only one remaining transformer rectifier welding machine on the market today worldwide and I was surprised when I found it.
While there are millions of transformer rectifiers out there in the welding world,,, Almost nobody is selling them anymore.
I just did a quick review of my PowerWave utilities and discovered that there are no GMAW or GMAWP subroutines prepared for steel and Argon/Oxygen gas mixes... So that is a point in favor of the text you captured.
I've never been a fan of oxygen mixes for steels, but they can work. A trend away from those mixes would not bother me at all.]]>
https://app.aws.org/forum/topic_show.pl?pid=288917Power supplies and gases for spray transferMalRD2023-09-30T01:46:55Z2023-09-30T01:51:31Z7
https://onedrive.live.com/embed?resid=85E4C4B6EFAD9E09%2113467&authkey=%21ABrPGSBjeM-XRuY&width=741&height=534" width="741" height="534"]
This is what i'm talking about, bottom of the second paragraph.]]>
https://app.aws.org/forum/topic_show.pl?pid=288916Power supplies and gases for spray transferMalRD2023-09-29T19:11:27Z2023-09-29T19:11:27Z7 I just managed to dig out a fifth edition WIT-T book (2008), and the statement is not in there, nor is it in the fourth edition WIT-T book (2000). It looks like this is a "new" addition to the 2020 edition.]]>
https://app.aws.org/forum/topic_show.pl?pid=288915Power supplies and gases for spray transferMalRD2023-09-29T18:30:27Z2023-09-29T18:30:27Z7 Regards]]>
https://app.aws.org/forum/topic_show.pl?pid=288914Power supplies and gases for spray transferMalRD2023-09-29T16:40:57Z2023-09-29T16:40:57Z7 And yes i agree, the statement from AWS is what i couldn't figure out, to me it seems like it could be a remnant of what could have been a fact back in the day when inverter technology was in its infancy and gas development again wasn't as "specialized". I am an instructor at a college in Idaho and have been a CWI for 18 years and i have never come across this statement before. We generically use a 90/10 mix Ar/Co2 for our spray and pulsed spray.
This statement to me is "nowadays" so far out in left field, that i didn't know if historically there was a reason for it.
The closest reason so far that ive found is from the Lincoln foundation procedure handbook from 1994, that one states about a spray machine having two transformers to run spray one DC one AC.
My guess is that this statement in the WIT book is a remnant of older technology and it has never been removed... Unless anyone can inform me otherwise...
Regards]]>
https://app.aws.org/forum/topic_show.pl?pid=288912Power supplies and gases for spray transferLawrence2023-09-29T12:35:40Z2023-09-29T12:35:40Z7 I think it's a bogus statement with no provenance in weld reality.
Both Ar/Co2 and Ar/o2 have been used for spray transfer GMAW before inverters became prominent and after inverters dominated the market.
DC current is DC current...
Some transformer rectifiers had slope lugs for spray transfer, some did not. Some transformers have inductance controls and some to not.
Most inverters have some inductance controls and a favorable slope for both short circuit and spray...
What does that have to do with Weld Gas? That is not a CWI level question.]]>
https://app.aws.org/forum/topic_show.pl?pid=288911Power supplies and gases for spray transferTimGary2023-09-29T12:34:30Z2023-09-29T12:34:30Z7
Both gas mixes can be successfully utilized in both platforms. I think the decision is more based on current trends than clear cut need for differences. My opinion is that Ar/CO2 blends are better for tuning out spatter on GMAW Pulsed welds made below 250 amps.