Part II now online: kzfaq.info/get/bejne/opd8Y7yjz721iKM.html

So I actually finished work on Christmas Eve, but the video took 14 hours to upload, because of the horrible upload-speed at my parent's house :D. So it really is Christmas by now! So I wish all of you a a Merry Christmas and I hope that all of you are having a good time no matter if you're with friends and family or all by yourself, maybe in some dorm room somewhere. (I've had some of those Christmases myself). So my thoughts are especially with those of you who have to spend the holidays alone. One thing that always helped me to keep my spirits up, was to watch Al Bundy getting through his holidays all by himself (after his family had left him to eat at Denny's without him) :D kzfaq.info/get/bejne/naqljKxhucrDoqs.html (In better quality: www.dailymotion.com/video/x6a01rn)

I started learning to MIG last week and remembered your videos about repairing welding machines.

It was so good today to see a wonderful new TPAI in the classic style. I'm sure it takes ages to produce each one of these full-length, detailed TPAI gems - there is not just the work itself, but all that thought which goes into scripting, and hours worth of editing after that - but the results speak for themselves. I hadn't realised how much I have missed the real TPAI until watching this first new one in a very long time. If it takes many weeks to produce each work of this quality, so be it. It is always well worth the wait.

I love this kind of videos like in the old days, thank you and Merry Christmas!

It was so clear! You have my admiration. You would be an amazing teacher in a technical school. Really. Have a nice holiday time!

You do some of the best informative commentary I've ever encountered on KZfaq. The natural progression from one aspect to the next coupled with explaining components and sections that i naturally was already curious about all outlined with diagrams or drawings that are done to a professional standard, All of it is simply fantastic . I even find the extra tid-bits of historical changes made overtime or the extra time taken interesting in their own right and believe that info could vary well be extremely helpful to someone who may have a similar model or the same model of a different year as it's pretty rare for people to have the exact same identical product. Don't worry or stress much if a segment you're doing is turning out longer than you think it should. Many subscribers like myself enjoy learning about the "how" and "why" as much or more than the "what".

Honestly you have such a fantastic youtube channel! I came across you the other week and have been watching video after video. I am very grateful for all of the details you add into these videos which really helps with understanding the function of the machines / tools you are fixing. I have gained so much information from you and especially from your scrap yard episodes. As soon as lockdown is lifted here in the UK I will be heading to my local yard and trying to follow in your footsteps😊. So please continue your hardwork and I will be awaiting every upload!!!

i wish you had an USB 3.0 output in your head n i had one in mine as well so i can stream all the knowledge you have .. i don't know how to thk u for sharing all these precious knowledge in ur videos . keep up the good work ☺

Love your work, and the thorough explanations fill in all the gaps with details that I got rusty on over the years.

Ein großes Lob für Deine Arbeit! Ich schaue mir seit längerer Zeit auch Deine Videos an und tue dies in zunehmendem Maße, da Du immer interessantere Themen hast. Sehr angenehm ist Deine Art, die komplizierten Dinge auch für den Laien verständlich aufzudröseln. Der heilige Abend ist nun zwar schon rum, aber eine besinnliche Zeit wünsche ich Dir dennoch. LG André

I like your movies! For me, you are an archaeologist of forgotten electrical and electronic devices. With your enthusiasm, you bring them back to life using new solutions and technology. Bravo! ..and Merry Christmas!

Merry Christmas from "Wales". Great video explained so well, looking forward to the rest of it.

Great video, really enjoyed it. Three phase welders are very common finds at scrap yards here in Aus. I don't have three phase but still had to pick one up. A Kemppi 400amp synergic pulse mig.

Best explanation of 3-Φ, cleared up some fogginess I had on the subject. Cheers, Mark

Absolutely astounding content TPAI. Can't wait for more parts.

Merry Christmas and a happy new year! Nicely updated old workhorse, ready to weld all day!

Good old welding tool. Nice that someone appreciates. These tools can be repaired again and again and can withstand an EMP.

I now think I understand transformers. It's late on xmas day here in NZ and I got education as present from Germany. Thank you and Merry Xmas to you too :-)

That was an absolutely amazing video! I loved learning from this style.

I love your videos! We need more troubleshooters like you.

Now I am subbed once again. Excellent upload. There was other welder work that was wanting before you left the old digs and never completed. I was always looking for the finishing off on those projects buddy. But now we are back in the saddle!

Merry christmas! The welder is a beast and I look forward to seeing it come together!

i learn something new every time i watch one of your vids. all of my life i have tried to learn at least one new thing every day, and you are most assuredly helping me with that. vielen dank!

This series is starting out great! Nice work!!

Really enjoy these kind of videos! Very informative, detailed and well structured just like your repair jobs!

That‘s some big project. Congrats on mastering something like that. Switching on this beast for the first time can‘t have been easy 😬.

Your explanation is so didactic! I am fixing an old ESAB LKA150 that was in the trash thanks to your inspiration.

You're great! Just fantastic with all the stuff you do. Extraordinary for sure!!! Merry Christmas!

As a mechanical engineering student I love marathon watching these videos. Super creative and informative

This is the "TPAI" I miss! Thank you!!!

What a nice found! Love these indestructible old machines!

Very good video.Waiting for part 2.Merry Christmas!

14:00 explanation of phases and volts is AWESOME! I now have a much better understanding of the phases, which is not really saying much because I'm an electro-idiot. :) Working hard to increase my understanding of electrical systems and circuits, especially DC because I own a motorcycle, and do my own work on it. Keep up the great teaching!

Thank you Great video . You gave me the motivation to go and make some modification on my Lincoln DC welder. I look forward to more videos . Merry Christmas!!

Yes: This video was a very nice christmas gift for me. Thank you and keep up this good work!

Excellent video. I look forward to the next.

Fantastic video! Thank you, and Merry Christmas!

One of your best videos in a long time! Great work on the drawings and diagrams. Happy new year

You are having a lot of fun. Merry Christmas.

Great video! You are very talented at explaining electrical theory, one of the best on KZfaq for sure.

One of the greatest welding breakdown videos I ever saw. Thanks for making it understandable. Your talent is the ability to explain clearly and in a very logical order. I'm taking apart a welder right now, and hoping to get back welding again, so this is an inspiration to me. I must say those German units are very much to be admired for their solid construction. Wishing you peace and grace and a new year full of prosperity and good cheer. Aloha!

Merry Christmas. I'm looking forward to your upgrade to switching mode. I have actually been pondering the same update to a similar welder of my own.

Awesome video! Cant wait for part two!

im an electrician in the US i find your videos fascinating. i had no idea your 220 used a neutral. we usually assume its 220 phase to phase like 220 in the US... i work at a 120 year old steel forge, you would love all the old stuff we still have. i took a motor off of a crane a few years ago that was dated 1919 and it still worked up until then

the bonus with a separate PSU and eire feeder like this is you have a great high current low voltage DC PSU.. my dad built his own mig welder from scratch (yes that right from scratch and its about the same power as this machine!!) and we have used the PSU to directly start cars when the battery was flat!!

Fantastic explanation! And when you said it was around 25 minutes it felt like 10. Merry X-mas! :D

Nice drawings and explains ! If you would consider to add a diagram with the 3 phases waves (or a link to a video about it) it could be even brighter for those (like me) who need to see how it works from inside the inside. The help of 3 phases in rectifying electricity is so important... During my studying period in college I worked on a project in which I ordered a single phase inverter. This machine had the capability of supplying 3 phase and of course had PWM support. Might be interesting if it works for powerful machines like a welder...

A TIG/STICK welding power supply is a constant current supply. A MIG/MAG welding power supply is a constant voltage power supply. The TIG/Sick supplies have a higher open circuit voltage a relatively large voltage droop (voltage drop when welding). The output choke (coil) helps control the droop. You can wire weld with a CC type power supply if you use a voltage sensing wire feeder. With this type of feed control as the output voltage drops the wire speed does too. With a CV power supply the feeder would be a constant feed type control.

Superb illustration of how electricity 'flows' and controlled. Well done. Merry Christmas and Happy Holidays!

Happy Holidays TPAI

Frohes Fest und Guten Rutsch wünscht Herri aus Kunming, China.

Three phase is great, my grandpa used to be obsessed with three phase stuff. Almost every tool in our garage has a three phase motor in it. The bench grinder is three phase and when you press the on switch it speeds up instantly and is impossible to stall out. Ps: sweet welder, my three phase arc welder can only do 180A@100% but i got it for 80 euros so i'm not complaining :D

Sehr schönes Projekt! Ein guter Rutsch ins neue Jahr sei dir gewünscht.

Nice work, merry Christmas!

Awesome drawings !! Waiting for the next episode :)

Thanks and Merry Christmas 🎁

Merry Christmas & happy new year to you !

merry Christmas

Thats a wonderful welder you found there... would love to find one of those.

super gemacht, danke dir für deine Arbeit

your channel is gold

Thanks for a year of great videos :) Hope you had a great Christmas- all the best for 2018 from out here in Taiwan

Frohe Weihnachten und einen guten Rutsch!

Merry Christmas to you and the family.

Merry Christmas...you are great educator and cool guy :)

thanks for the video , you will be able to run that welder all day no problems !! Merry Xmas from down under ...

Nice job my friend, you produce very high quality content that is great supplemental material for anyone interested in EE projects

I was cleaning out my shop today and found a box of parts from printers, scanners, and a fax machine I think. If you need or want these parts I would be happy to mail them to you, as long as the postage isn't outrageous considering that I live in Texas.

In the US, a great deal of used 3-phase equipment goes directly to the scrap yard. My local yard has 3 giant MIG welders like this, a surface grinder, and a warehouse of other equipment.

Nice work. A monster episode! It was very well presented. One note to add for the common core transformer: Since each winding shares the common core. when one phase is active or conducting, the magnetic field in the core induces current in the "non-active" phases. This results in smaller overall ripple amplitude but at a higher frequency. This is important in EMI, but I'm not sure if it matters in this case. And it's "Ah Loooooh Miiihhh Nuhm" (4 syllables). The extra I after the "N" does not exist and should not be pronounced, even though every English person does that!

Merry Christmas and frohe Feiertage

Great vid TPAI enjoy your holiday, prost.

Merry Christmas Sir!

Frohe Weihnachte!

Merry Christmas

Have a Merry Christmas and a Happy New Year too. Keep up the great work with the welder. I would have to disagree with your choice of fans as a metal fan would be much better as the original equipment manufacturer intended. Sometimes you can find one for cheap on eBay and they deliver to your door. Love your detailed explanations and understanding of electricity too.

What magnificent machine and your explanation is very good. Thank you.

Awesome Sir ur doing really great job 😘

I really like the idea of using a G clamp for the negative

Great video. Very informative.

I love the fact that most of Europe have 3 phase power. Very very smart of the utility company to implement. 3 phase power delivery is more efficient because using a 3 phase motor is far more efficient than a single phase using a running capacitor. Too bad US did not take that on for the residential. To have that done some utility company charge you an arm and a leg to implement and setup for use in residential.

Amazing video, thanks for the knowledge and the time to show it. Prost!

Very cool. Good work ...good work.

What a fantastic informative video. Love your work 👍👍

Sauber! Und: Frohes Fest.

Excellent video. Merry Christmas. Have a very relaxed and enjoyable day with your family. See you in the new year..

Very cool video. Thanks!

Merry Christmas. and happy new year

You might find the Haas Kamp Three Phase to Single Phase Conversion method for welders interesting. An internet search will turn up lots of info about the method. i know Dave Kamp, one of the creators of this process, and he is a very friendly, and helpful guy. He and his partner, Haas, developed this method for the same reason you bought the MIG/MAG welder you did; the industrial duty cycle. They are freely sharing the method, hoping to get future welders into 'real' welders, instead of what is sold at home improvement stores. An internet search will turn up loads of information about the process. Dave posted the conversion on Practical Machinist, originally, and that is the best way to reach him, through that site. They have done lots of testing, and have shown the converted welders weld as well with converted single phase as they do with three phase. When I first talked to Dave about the conversion, 3-4 years ago, the cost for converting a welder was about $150, for new components. The majority of the cost is the large capacitors necessary. A very simplistic explanation of the process is a capacitor is used to store the 'third phase', then, the stored current is released at the appropriate time to create the 'third phase'. The key, for me, to understanding how this could work, was to understand that 240v single phase is not an accurate term. Conceptually, it is two phase; two legs of 120v, 180° out of phase from each other. By storing, and delaying the release of a created third leg, you end up with three legs of 120v, 120° out of phase from each other, which is, three phase. When Dave first explained it, he told me several times, what makes this possible is a welder is different than a motor, in that there is no rotation. Rotation makes timing of the three phases more critical; welders are more forgiving. Since I learned about the method for conversion, I have since learned of a device sold as a Phase Matic. I bought one from a machinist a year ago. It is simply several relays and a capacitor. Conceptually, it does the same thing, creates a third phase. The relays are responsible for the control of the third phase. You use the Phase Matic to start a three phase motor, then once it is running, it will continue to run on 'single' phase, and also generate three phase. This allows you to start additional three phase motors, as long as no single motor is larger than the first motor started. Once you get other, smaller motors started, the original motor can be shutdown, and the smaller motors will continue to run. Quite clever.

Merry Christmas. Fröhliche Weihnachten.

great machine, and a great video my friend !:)

Very informative; thank you

Genius I tell you, Love this stuff

Merry Christmas and best wishes for 2018.

This is a great topic, I'm so IMPRESSED by that wire feeder and the general construction... but can't stop thinking: "You have three-phase power IN YOUR HOUSE?"! Suddenly I feel like a peasant. Here in the US, this is only in commercial situations, and not always then! 440Volts will really knock you down.... We all agree, if you want a bunch of DC, three-phase is the way! You're covering a lot of ground here. I have most of the STUFF we see in your videos, but nothing like the expertise and overview. I am surprised to hear that you want to stick (MMA) weld with a Constant-Voltage supply, but I haven't finished the video yet. This is very dense, and I'm watching some parts several times, or pausing to look at the drawings. It's like KZfaq Polytechnic!

Have a Merry Xmas

Good video, perfect work.

I m aghast with through knowledge you have! Great!!

That welder was a nice find.