Welding Theory - What are the Effects of A/C Frequency When Stick Welding?

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Paul Brown is back with some more welding theory for ya! Who knows the effects of having the A/C frequency set lower or higher? Which would be better to prevent burn-through? Which would make a weld more narrow?
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Опубликовано:

8 июл 2024

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Комментарии : 71

@ypaulbrown 2 года назад

Please note: when I am speaking of the heat telegraphing through to the back, it is the protrusion or bump on the back, not the heat discoloration. The higher hertz welds really left no bump, I hope this helps clarify, Thanks for watching, Paul

@jessielloyd920 5 месяцев назад

12 years teaching welding and this is the first time I found out I could adjust frequency with AC stick welding! Another great video to share with my students so that they can get an up close and personal look at the theory. Love learning something new after all these years.

@toterola451 2 года назад

Great video! Even after I've been doing this for so many years, I still learn something every time I watch one of your presentations. Thank you!

@Welddotcom 2 года назад

Thanks for watching!

@ypaulbrown 2 года назад

thanks for the comment and for watching, the great thing about welding is there is always something to learn or try out.......cheers, Paul

@toterola451 2 года назад

@@ypaulbrown you've got that right. I try to keep an eye peeled for emerging technology in the trade. You all are a huge help with that.

@shanjacqueline699 2 года назад

Oops it is so cool! I am a college student major in industrial engineering, and recently just started learning welding very unskillfully . Can't imagine Paul's skill. Welding looks so much more interesting.

@ypaulbrown 2 года назад

Shan, sorry for taking so long to get back to you, welding is both a science and an art, you use the left side of your brain for the technology, but the right side for welding.....just like an artist paints....I started out my career to be an artist, but found I liked welding much more......I went to Art School for over 5 years, and we studied nothing but art......it was educating us to become professional artists, designers, painters, sculptors, industrial designers, interior designers, and on and on......get in there and do some welding, it is not easy, but it is not hard either, good close vision and hand eye coordination is what you need, and patience.....you are sewing with molten metal.....good luck on your career, and best wishes, Paul, thanks for commenting and watching....

@ProleDaddy 2 года назад

Did the camera guy finally kill the regular dude?

@ypaulbrown 2 года назад

nah, he is still safe from the crew, the regular guy is still directing the action......he has a megaphone, high leather boots, a beret , and a fancy chair, plus some very helpful beautiful assistants to bring lunch or snacks when he needs them......thanks for the comment and for watching, Paul

@ferrumchnop6617 2 года назад

We've done some 7018 with ac for flat high amps (don't remember the hz). Helped to reduce some substantial undercut.

@ypaulbrown 2 года назад

AC is considered to be better for high amperage use and also if you are a long way from the welder., .....that is the reason we use AC for power transmission.....it also deposits more metal than DC+ and has a less digging arc, that would explain the reduction of undercut....I know those big 3/16 7028 rods love AC....thanks for the comment and for watching, Paul

@kf8575 2 года назад

@@ypaulbrown 6mm 7024s love a bit of AC too. In a past job used to use them on AC for welding heavy gauge (25mm+ thick) structural steelwork and platework, due to lots of arc blow anywhere near corners👍

@peetky8645 2 года назад

hey paul...can you do a video on an aftermarket thumb switch for the stinger to change current while welding

@ypaulbrown 2 года назад

that sound like a great idea, back a few years ago, I was doing repair on auto haulers [big ole trucks] with lots of bars] and while crawling around on them, I decided it was a pain to keep getting on and off, to adjust amps, so I hooked my thumb control up....it was great, because I could shut the power off for safety, or raise or lower amps if a big gap had to be filled......I will get with the director and pass the request on to him....cheers, Paul

@rbelang8331 2 года назад

@@ypaulbrown +1 on this request...

@grege2383 2 года назад

Good video. That being said what would have been helpful is application examples. e.g. When would I choose 220hz over 60hz, when would I choose 20hz over DC+

@ypaulbrown 2 года назад

I guess the bottom line would be if you need more heat and buildup, the lower frequency would be the ticket, Thin material and tight areas [corners] , the high frequency would be a better choice. hope this helps, Paul

@MeltinMetalAnthony 2 года назад

Great demonstration Paul!!!!

@ypaulbrown 2 года назад

thanks Buddy......not something everyone can or would use, but more of a science project......cheers, Paul

@ifell3 2 года назад

Bloody best content for a while, cheers guys

@ypaulbrown 2 года назад

thanks for the comment and for watching, I had been wondering what effects AC frequency would have for a long time, finally got to try and was really surprised, Cheers, Paul

@ifell3 2 года назад

@@ypaulbrown things like this is what makes channels great. Might be handy for thinner material.

@JonDingle 2 года назад

That was interesting, top stuff!

@ypaulbrown 2 года назад

thanks for the comment and for watching, I really appreciate the comment......always something new to learn.....best wishes, Paul

@georgekefallinos8120 2 года назад

Thank you

@christophe5756 2 года назад

I saw the trailer here in St. Pete, Fl.! 👍🏽👍🏽

@ypaulbrown 2 года назад

It lives over in Pinellas Park area,, Largo......was it cruising or just parked somewhere? thanks for watching and commenting, Paul

@markbrajkovich311 2 года назад

Thanks I learned something today

@ypaulbrown 2 года назад

Mark, glad you like and thanks for commenting and watching, Paul

@davidleblanc9676 2 года назад

Comeaux caps is all I ever wore

@ypaulbrown 2 года назад

they are great stuff......

@MC-yx2gn 2 года назад

Wearing comeaux caps is like wearing Timberland work boots…you might buy them as an apprentice, before you know what brands are ACTUALLY good, but after a while it’s American Redwings and custom caps (probably made by a fitters wife and sold on eBay). Just me maybe.

@ypaulbrown 2 года назад

Thanks for watching and commenting M C, I had to stop wearing Redwings because of quality, went to Thorogood and WESCO, bought some Wolverines last year, but one is so different than the other I cannot wear......Redwings always fit well and needed no break in, but so do Thorogood and WESCO, since I am on concrete all the time, the WESCO's were hard on the knees as they have Vibram lugged soles....the Thorogood's and Redwings like and have now are the MOC Toe no heel jobs.....a little better on concrete..... as Far as welding caps, the problem I have had with high dollar ones, [$30.00 or more] is the durability, maybe and availability, in my opinion, and I have a lot, haha....for the money the Comeaux's are the best deal, but then I am not on job sites much anymore and the shop I am in , no one else is there. but me......my friends who do not know I am a weldor always like my hats because they think they are 'Unusual'....cheers, Paul

@MC-yx2gn 2 года назад

@@ypaulbrown I forgot about Thorogoods. I like that they give a union discount too. I couldn’t resist the comeux dig, but I’ve got a few of them in the truck somewhere. Like anything else, after doing it for a while you just fall into what you like. The new trend seems to be the most expensive stuff takes the lead, but I’ll swear by these Key denim shirts I wear over half of the expensive welding jacket brands being promoted on Instagram (and that all of my apprentices come in wearing). I must be getting old.

@ypaulbrown 2 года назад

@@MC-yx2gn I really like the Lapco's , I recently found a denim one in our dumpster, it was brand new!!!snarfed it up pronto....I think it cam from a guy who was selling used / vintage clothes....at 55 bucks, they did not know what they had, I need to try some of the Wrangler shirts, pearl button of course.....the FR shirts I do not like.....thanks for the feed back, stay warm and stay safe, Paul freezing here in Orlando, FL.....

@MC-yx2gn 2 года назад

@@ypaulbrown pearl button western style for sure😎👍🏻! We’re huddling over the torches up in NY right now too.

@naeemgillwelders985 2 года назад

Good job bro

@ypaulbrown 2 года назад

Naeem, I really appreciate that, thanks for commenting and watching, Paul

@yurimodin7333 2 года назад

almost looked like some arc blow towards the end of the 360hz pass.......interesting.

@ypaulbrown 2 года назад

thanks for the comment and for watching, you might be right about seeing arc blow, but AC does not have arc blow issues..maybe it was just the erratic quality of the arc? .the arc cone was a little erratic....I hope this helps, .cheers, Paul

@robertogutierrez3593 2 года назад

What lens do you guys have on that hood ? Just picked up the tiger hood and I want a variable shade that fits

@ypaulbrown 2 года назад

Roberto Gutierrez: Opps, I was thinking of another hood I use, but here is the info on both hoods, Paul......that lens is a Variable shade 4x5 ArcOne that has a remote sensetivity control, I bought this last year because of the true color, my partner bought one and I was really impressed with the color rendition, it is very true color....the hood was terrible and I had it deform when I left a few shirts laying on it in my truck.... very flimsy, and my 2 friends who bought one had the same issue, the hood head gear is junk...it will not stay adjusted even after a minute or so.... ..so I had a Tigerhood that I put the lens into, I had to run the remote [2.5x1.75 x1/2 inches] to the bottom of hood on inside . a wire connects and needed no modification. no cutting of hood, no big deal, just used tape to hold in place and wire rests underneath the retaining clip of hood, I originally was going to use the Fibermetal 4x5 vertical [narrow] hood but their was not enough room to clear head gear with the remote at top or bottom... I always wanted a horizontal view anyway.....so it was the Tigerhood that got the nod, pun intended.... it has worked wonderful.....[this is why I bought, because of the large viewing area...and color...BFFVX Light State 3Dark State 5-13Digital Sensitivity Variable Grind Delay YesTIG Rating Amps 5 No. of Sensors 3 Regulation In Viewing Area 17 sq. in. ] I also use the Lincoln 2x4 autodarken for my Tigerhood flip lens hoods.... the color is very accurate....Lincoln Electric 2X4C....I am very pleased with it, I have owned Jackson, Miller, Huntsman and ArcOne Autodark lens since 1996, the ones I am now using are by far the best I have used...... technology has come a long way....The Huntsman AV/L was also great, but it died after 15 years.....and was $389 in 1996... I hope this long winded description helps.... I mentioned the 2x4 flip hoods, I use them when in dark areas so I can flip up to clear view to see and also cramped areas so I do not need to lift hood to see, just the clear lens.....I also allows me to use a cheater to inspect welds and chip/clean slag with out worry of chips in my eyes..... Tigerhoods are tough.....and one of the few that are rated for overhead welding.....most new fancy hoods are not rated for overhead . Cheers, Paul Brown p.s. the ArcOne covers all but a 1/2" strip where sensor is, it is a huge viewing area.....you can see in the video the strip....

@ypaulbrown 2 года назад

Something I did not see while welding and only after seeing the video clip of the machine settings while welding, was the increase in voltage the higher the hertz and the drop in amps at the 360 hertz setting. The machine was set to 90 amps for all welds, which was not clearly pointed out. Arc length stayed pretty consistent, I did have an issue with how fast the rod needed to be feed into the puddle, as I am used to using 1/8" rod and not 3/32", the 3/32" takes a much faster feed rate, that would explain the slightly variable arc length you see......I guess practicing with 3/32" 7018 feed rate is in store for this Weldor Guy, thanks for watching, Paul

@ieatslag5947 2 года назад

You did fine brotha, interesting video. I’m gonna do some AC stick welding just to annoy my coworkers

@ypaulbrown 2 года назад

@@ieatslag5947 Outstanding......it is fun to get into the high frequencies and let them hear that dynamo hum and wonder what the heck is going on, cheers, Paul

@rolandsarins7151 Год назад

I wonder how this all works on open 7018 root fix pipe? There's definitely place for experiment!

@brentpaulus4195 2 года назад

It would have been nice to see a cut through and compare the difference in weld penetration! JMHO

@ypaulbrown 2 года назад

I am not sure how much you would be able to see, but the bulging on the back sure says it was digging deep, and 7018 is only a mild digging rod.....thanks for the comment and for watching, Paul

@aandrewfoster1 2 года назад

It was set to 100 amps but the welding was done at 90 and the last was 56 so the penetration was always going to be less?

@ypaulbrown 2 года назад

actually the machine was set to 90 for all welds.....yes, originally the machine was set to 100, but reset to 90 for all tests. thanks for commenting, Paul

@zakaroonetwork777 2 года назад

What Frequency does an old Lincoln AC Buzz Box run at? Is it 60-Hz?

@ypaulbrown 2 года назад

Yes, it is 60 hertz, all transformers in the USA run at 60 hz, and Inverters also run at 60, unless you have the ability to change the HZ.....thanks for asking and viewing, Paul

@jarrodjernigan5013 2 года назад

so what application would one use ac?

@ypaulbrown 2 года назад

Jarrod, you might want to use AC where you need less penetration, more build up, being further away from welding machine as AC current flows better than DC with less voltage drop, using larger electrodes, and being able to change frequencies to change the arc characteristics ..and no arc blow...thanks for watching and commenting....Paul

@caseyrobinson6520 2 года назад

Call me crazy but I can’t get over his welding cap being on backwards.

@ypaulbrown 2 года назад

I wear like that with the brim in front while not welding to keep the glare off my glasses, they make me flip up brim to keep shadow off my face in the weld lab....thanks for commenting and watching.....cheers, Paul

@kelljemison2790 2 года назад

Hmm .. with all due respect ... you need to do better with your travel speed consistency. Overall, I appreciate the subject and the content.

@ypaulbrown 2 года назад

thanks for the tip Kell, to be honest, I very seldom weld with such small rods [3/32] and I am not used to how fast those burned, I mostly use 1/8 and 5/32.....I would have liked a little test time before shooting, but we were on a tight schedule.....thanks for commenting and watching....Paul

@dennisisaac746 2 года назад

Ac that’s not welding

@ypaulbrown 2 года назад

AC, that's not welding, sounds like a Dire Straits song from 1980's....AC is used a lot more than you think in industry as there are some things like arc blow that does not effect it, larger electrodes work better with it, more build up than DC+, and longer leads can be used for less current drop. thanks for watching and commenting, Paul

@milsgarage 2 года назад

First!!

@ypaulbrown 2 года назад

thanks for the comment and for watching, right on, that is not an easy thing to do, I personally try to do that all the time my self......best wishes, hope you got something out of the video , Paul

@thomascraig3694 2 года назад

Not to sound like a pedantic bore, but WHERE was the theory? WHY did higher frequency oscillation produce less penetration? HOW does it work? WHAT are some specific applications for the various frequency settings and why would you use them? Come on, man! You're hardly quenching our thirst for knowledge here. My curiosity is not satisfied! 🙃

@ypaulbrown 2 года назад

great question Thomas, , I have no idea why the amperage is less [less heat and penetration] at higher frequencies, the arc is more focused at the higher frequency and that causes it to not jump over to close objects, high frequency would be good if you were in a tight area and trying to not arc out on something, Low frequency has a wider arc cone and higher heat input, so thicker material would benefit in a lower powered machine. Using AC also remedies the problem of Arc Blow. AC also has less penetration than DC+ and more build up. add these things up and I am sure you will find a solution to a possible weld problem. the same effects are seen with AC GTAW [TIG] and they definitely help when welding aluminum. Maybe I will do some digging and see if I can understand the actual reason for the effect of high frequency on the arc, I am not a physics or electrical engineer, maybe someone can chime in???? Just an old seat of the pants weldor....trying to discover solutions for problems I do not have.....cheers, Paul Brown

@tweake7175 2 года назад

@@ypaulbrown amps is less because there is more times where there is zero voltage. Zero voltage means zero amps. Same as ac on tig. The interesting thing would be if the narrow bead stays narrow if you increase the amps to generate the same heat.

@ypaulbrown 2 года назад

@@tweake7175 I will try that in the shop and get back with you.....I was thinking that a constant current machine should have kept the same current [amps] though, I need to do this with tig also and see if there is a big differance....thanks for pointing this out and watching the video, cheers, Paul

@tweake7175 2 года назад

@@ypaulbrown i would bump up the amps untill you get the same penertration. Then see if bead is wider. Doing it with tig would be cleaner and easier to see. Also see if the same applies with pulse. To make it really interesting get a pulse stick welder.

@ypaulbrown 2 года назад

@@tweake7175 we are doing a video on pulse stick, not all machines that pulse will pulse stick, sometimes you need to run the inverters on the tig mode to get them to work....I have been doing pulse stick since about 2001 when I bought a pc 300 Miller for my Miller.Synchrowave 250....cheers, Paul