DIY Arc Welder Using Microwave Transformer? | MOT | Failed!

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[@5Dale65]

Connect primaries in parallel and secondaries in series, so you double the voltage, but it will still be not enough. You need three MOTs connected in the same way to reach 20V at the high current output and really start to weld!

[@Nematics_Lab]

I don't have a power source to provide that much input current at the moment but it did came to my mind. But I was worried about electrical insulation breakdown better primary and secondary.

[@khayyam741]

Actually you need to use a bit higher guage with thin insulation like enamel rather than rubber insulation which takes up much space which can be utilised to add more turns. Also you might need around 36 volts to weld wthout a problem.Just watch the video on the king of random channel.Don't forget to make right primary and secondary connections.The video will help you a lot.

[@Creativecreator]

You can connect transformer in parallely. The induced flux from the primary is fully isolated with secondary so you can connect them in parallel and for the secondery voltage you should wire winding serial for barely 15V for working Hope this helps!!🤗

[@Nematics_Lab]

This should work but its possible that isolation can break between Secondary and primary so I would try that after I`m done with different projects I have planned with them.

[@gantz4u]

@@Nematics_Lab What creator said. wire them in parallely on the primary coils and series on secondary. But also it is important to understand phase. Not only in whether to wind the new secondary clockwise or counterclockwise but also in how the primaries and secondaries attach to each other. There is an input pole and output pole on each winding. I think of it like + and - poles on batteries. Where the coil enters the core (first winding) are my positive terminals and where the coil exits the core (last winding) are the negative terminals on the primaries. Just as important as attaching the wires on the secondary coil side, the last winding on one core should be connected in series with the first winding on the next core. Finally the end of the first secondary winding in this series is your welding "ground" and the last secondary winding is the stinger. Do this all right and one of your secondary coils is wound counter clockwise against a clockwise wound primary? and who knows what happens? I had all of this right except + and - mistake on the parallel wiring of the primaries and was only reading 5 volts on 20 windings of 10 gauge wire on the secondaries(2 core system). Fixed the issue and started reading 45 volts(was expecting 36 - 40 VAC) So close enough. Another matter that everyone neglects to mention is the shunts. Leave them in or take them out? Well I look up their purpose and it says "reduce arcing" somewhere. Arc? that's things I want. 2. the shunt in a transformer built for welding can be pushed in and out with a control wheel. All the way in is low power setting. All the way out is high power. So I assume no shunt means higher power and bigger arcs. Not positive on this, as it's very hard to tell if shunts are installed on these "tutorials"

[@Nematics_Lab]

@@gantz4u I appreciate your explanation I forget that I can wire both primary in parallel and secondary in series and at the moment I don't have access to mains with voltage 240V 16A or higher so I cannot test that setup as both transformer will draw about 4-5A when in action

[@gantz4u]

Also should mention the input I`m using here is 120VAC variety. This is a "stepdown transformer" design so theoretically the math is this: 120VAC at 20 Amps input. 45VAC reading at the output. Should be: 120/45=2.66*20amps = 45VAC at around 53 amps on the output theoretically I believe. Im hoping this is hot enough to cook with a 1/16" 6013 rod although I`m on the low end of this theoretical output as I was shooting for around 35V @ 70amps with these windings, which I've heard should cook a 1/16" rod just fine.

[@tech-savvy5376]

I fully agree with theory provided by gantz and want to add one more step.... The way we want to ensure polarity of output winding (through clockwise or counter clock wise) we have to ensure the polarity of input supply also to be same. Then only the output winding polarity can be determined.

[@popoytv1199]

Primary connect parallel. Secondary in series. Im using thus method and it work good. So your winding is wrong.

[@jordigrau83]

how many turns do you need to get the necessary voltage?

[@sreedhararao8144]

What is the purpose of this video man u r the Amazon agent it seems

[@patlevis2430]

You should put the primary coil in parallels and and the secondary in series. It will work somehow. Use a 4mm cable and make around 50 turns in each transformer. It will provide you around 40 volt and around 120 amps. Not enough, but it works for short welderings

[@luciusirving5926]

Use 8 or 10 gauge wire, use a screwdriver to make space after a certain amount of turns to get over 20, connect secondaries in series (only secondary coils should be connected in series) and use oil to cool your transformers. Oil cools faster than air. Yes, your secondary coil wasn't tight enough. The tighter it is inside your transformer, the more powerful and stable the arc gets. Getting a big enough charge to overload any electrode. You're supposed to use 3 MOTs in series for that 3mm electrode.

[@josephyazbeck6102]

GENTLEMAN...plz more technical wires connections clarity (detailed)... especially,,,, concerning the terminals connections parallelly and in full clarity.... step by step.... to do it by myself.... such as yours.... and to get a perfect and a successfully great results.... thank you in advance for your helpful cooperation.... please your helpful reply as soon as possible....

[@bparker86]

so many people that dont know what they are talking about. it has nothing to do with not enough transformer. the problem is the secondary wire hes using is too large and too insulated. not enough turns on secondary. very easy fix. two mot's is plenty for a the 90 ish amps required for a decent stick weld. you can weld with one transformer lol

[@ziakhan8802]

U have to put both primary winding in parallel

[@averaver9257]

The cables seem to thick you should connect cables for battery number 8 or 10 to get the job done, tht way you'll get about 16 volts per transformer, and if you add a third transformer you'll get about 40 to 45 volts it's better.

[@bparker86]

voltage doesnt ever neeed to be that high. around 20 volts is plenty. its the amperage you need. two mots is enough. its 90 amps for stick welding avg and two mots will do that and barely need cooling. and all this crap about mots in series nothing should be in series. secondaries in paralell and thats it

[@chithrag153]

what is your plan . what are you going to say the society

[@nicholecrouch311]

Don't rewind a Transformer add a second Transformer and wire them in series. The second Transformer Which you need to find one that is almost exactly the same. As the one you're using or the world won't be balanced. And it could cause some problems. But anyway wire up another Transformer just alike in series. And you will double your voltage output If you wire a pillar low. He will get the same but a higher amperage 4 watt rating I forget which but I know for AC stick welding. You want To wire two transformers in series and I know you'll get is more than enough power To be able to weld even thick Steel.

[@bparker86]

very wrong. god theres so many people giving wrong advice lol

[@aureliuzS.F.002]

You are actually using a wrong wire you need a 50 amp wire not a 80 amp wire . An 80 amp wire is for spot welding not for arc

[@MarkPolley]

Well, that was a waste of time to watch 😒

[@agasobanuyekezachannel464]

I Also made it and connected primary in parallell and secondary in Series in mu case i measured output volts at about 32v and it worked the only problem is over heating but i plan to give it a fun

[@engjds]

Primaries in parallel as other comments have said already, secondaries in series, but even then you only have 14V, cheap arc welders have 60v open circuit to get the arc started, so you would need 5 or 6 of these transformers.

[@nicholecrouch311]

Hahaha, I put to get a second one wired in series before I saw that you actually did that. Good job man good catch on that one.

[@haycin]

Ark kaynağı olmaz fakat punta makinası veya hızlı su ısıtıcı veya buhar makinası olabilir.

[@conyshaba]

Parallel primary

[@secretagent5658]

You do know about parallel connections right and how they work??? Series uses more voltage. But if you don't have more voltage and must keep them in phase. Conect them in parallel. It consumes more amperage but works the same as if they were on on circuit. So being a HV scientist I say it is a perfect experiment and will work perfectly if done right.

[@Nematics_Lab]

I appreciate you mentioned it :) But You are missing that if I wind output in series and input in parallel there are chances of dielectric breakdown/impedance mismatch which can cause a big fire, so for safety reasons I didn't show it in video

[@secretagent5658]

@@Nematics_Lab Well there's a certain procedure to follow to keep that from happening. And I can make a video on it to explain it all if you want. As long as you keep it all in phase whether or not the output on one is 50 Hz and the other is 60 Hz. It will work. I've done it on a 123 VAC 30 amp circuit. The output can be put in series or parallel. It will just use more input power. But if done right it will have no chance of causing a fire. Trust me. I'm an experimenter I get up at 8 in the morning stay in a shop work and work and perfect my designs and projects. Then I finally get out of the shop around 1 in the morning the next day. Some people have said it can't be done, but I have proven so many people wrong by doing it and succeeding while course making it safe. So if you explain thr safe way and layout, it can be published on KZbin.

[@secretagent5658]

@@Nematics_Lab Even with half the power avalible. For example you have 2 110 MOT's in series output and parallel input. It logically needs 240-250 VAC U.S.A power to run. But it can be run on 125 VAC. Or whatever the designed voltage says for one MOT. In your case it's 240 VAC. It will have less efficiency. And it gets warmer just 1 percent faster. But not by much. And not anything a little fan can't handle.

[@secretagent5658]

@@Nematics_Lab It's not possible for a voltage breakdown of the type of enamel and glue on the windings. Especially for the input voltage it is supplied with and is outputting. The heavy gauge is rated for at least 300 VAC. And the mains coil is rated for the 2,320 VAC - 6,000 VAC. And actually that's what its rated for. Through my many tests I am sure that you can add another 500 VAC to the wiring and it won't breakdown. There's always a safety leeway in electricity. In the end the only problems that can possibly occur is if the transformer was damaged, such as being scratched, or even chipped at all. But other than that if you're careful all the way then there isn't going to be a problem.

[@Nematics_Lab]

Thanks for all the information it was really helpful, I'm not an expect in HV so I prefer to be on safe side.

[@zmscott2507]

He wired it wrong, their working against each other not in combo. Wire your primary rights together in and lefts together for power in in.

[@HCDPEducation]

Try with a lower gauge of magnetic wire at the secondary winding. As I see in the both experiment you used similar type of wire, if the voltage falls the high current at the output. So try with lower gauge of wire and check whether there is flux leakage or not. All the best for your upcoming project. Team HCDP Education.

[@Nematics_Lab]

Using lower gauge wire will reduce the number of turns at secondary thus voltage will drop but current will increase, however I need more voltage for arc welding.

[@secretagent5658]

He's right, a smaller size of wire will allow for a higher voltage. And restricts the amperage allowed to flow. But you will have to be careful. There can be to much resistivity to length of wire ratio and to little. I found this out when I made a 12,000 gauss electromagnet to demagentize permanent magnets. But I soon found the right length. Of course though I could only run it for 20 microseconds cooled down to 30 degrees Fahrenheit. Or it would explode. I ran it on a 125 VAC 20 amp circuit. In a MOT there is major flux leakage. The main thing that can be done is to add a very magnetic material. Possibly pure iron-silicone metal sheeting. Put it around the transformer until the flux leakage is below 100 gauss on the surface.

[@anmolkumar6704]

@@Nematics_Lab try the king of random's video on this topic

[@SirJackson1995]

Uh nuh go

[@geekyfreak7920]

noice videooo man! i went to scrap yard to buy a microwave, the guy sent me to walmart and i ended up buying new microwave for this project! cheers it works like a charm ( to heat food ofcourse )

[@geekyfreak7920]

@Nematic

[@zondesamuel7671]

How

[@gregolsen1099]

I’m looking at my HV capacitor and the second transformer I pulled out of the second microwave right now. This guy just saved me from being pissed off with the Results of the project I was ready to begin on. Thank you for your post, it was more than helpful

[@patlevis2430]

You should put the primary coil in parallels and and the secondary in series. It will work somehow. Use a 4mm cable and make around 50 turns in each transformer. It will provide you around 40 volt and around 120 amps. Not enough, but it works for short welderings

[@3therea11]

If you use a capacitor and separate 240v inputs, then connect the outputs in series, would it not have the same effect, except with 240V input at both, smoothed by the cap? Likewise, you could use a voltage multiplier circuit

[@raeganvallay3465]

Thanks for the upload. Did you use standard pvc insulated copper wire or was it silicone insulated?

[@fajile5109]

What would happen if you powered the small wires instead? Wouldnt that step down the power into the thicker wires?

[@umanggandhar3899]

Are u mad cant u connect the primary in parallel and the secondary modified in series do comment as i am working on this project only m serious help me out

[@Nematics_Lab]

I thought about it but both transformers are different so I'm not sure if it will work. Could possibly lead to isolation breakdown.

[@umanggandhar3899]

@@Nematics_Lab see that i know about it but you could have winded both using the same wire i mean without any insulation break might be it would work i guess

[@Nematics_Lab]

Wires are not same and input impedance of both transformers are different. If you want you can try that out and let me know. Currently I have others projects on my list to do.

[@secretagent5658]

@@umanggandhar3899 Make sure the input of each transformer is in phase. If that is good, and your power situation is good enough then the output will be in sync. I have used a 1,380 watt 50 Hz 110 VAC MOT in series with a 1,800 watt MOT 60 Hz 110 VAC. This does work. They operate at the same frequency on output. Even though they say different frequencies.

[@andrewkhchan]

Great 👍🏼 video. Less windings to get more current. Watch King of Random videoclip.

[@indiawaale165]

I am having thos owen i bought it from home shop 18😁

[@chithrag153]

input connect parallel supply. then out put connect series it will get arc to weld

[@rohankuruppu9890]

hey..this is totally wrong wire connection. i made and using this method of welding machine with 2 micro wave transformers

[@shreyaskumar5366]

Bro you need atleast 35volts in order to paas sufficient current to sustain an ark.. Also you might wanna use a thin Welding rod

[@bparker86]

wherer are you guys getting this. 20 volts. thats it thats alll you need. the arc is amperage

[@russellhuston6481]

Ha ha ha.. priceless.. great instructional video..

[@rashidmahmoodjutt5988]

Transform Ka voltage Kitna Hona chhey single transform

[@jordigrau83]

did you removed the shunts? is it safe?

[@wwkrishify]

hey Nice video man,nice efforts, i know am asking stupid question but couldn't resist to ask you about the transformer any capacity of microwave will work and transform should be in working condition right?, don't mind

[@Nematics_Lab]

Transformer should be in working condition and higher wattage of transformer is better

[@wwkrishify]

@@Nematics_Lab thanks for response

[@tech-savvy5376]

Krish, transformer's primary coil should be good and we cut through the secondary anyways. Usually, in 90% cases I have observed (in over 20 MOTs), the secondary winding burns out. So, its good to go if the primary is still working. Hope that helps.

[@ziakhan8802]

And secondary in series

[@santoshvishwakarma6409]

What is the cost of 1 meter 16 sq mm wire? Plz reply it's urgent

[@Nematics_Lab]

90-120rs I guess so not sure

[@santoshvishwakarma6409]

@@Nematics_Lab Thanks bro 😊😊

[@laishangbambenitsonsingh2205]

Connect the primary in parallel N secondary in seires

[@Nematics_Lab]

Both transformer are different so I'm not sure if it will work.

[@joseportillo849]

Como ago para hacerla

[@corysnladventures2758]

Buy a welder 😂🤣😂

[@popoytv1199]

Wrong.

[@rzahauhnar7415]

Plese what the cable size

[@electronic7979]

Excellent

[@tonyvarghese75]

Nice

[@KIRIKTECH]

superb bro

[@jacekm]

4 x MOT . 4 x 8 turn coil. 4 x 8V - 9V = 32V- 36V. 50A - 70A. And then the primary winding of the parallel initial beginning with the beginnings and ends with the ends and to a strong socket of the network, and the secondary windings in series * start-end-beginning-end-beginning-end-beginning-end *.

[@EforEngineering]

You follows greatscott?

[@Nematics_Lab]

I do watch his videos he is great!

[@EforEngineering]

Yes, from your video it is very clear, as I am also his great fan

[@Successbyfailing]

Do not recycle the Transformers. What you made is a spot welder. It's good for welding thin metal sheets together It well, it's in one spot and you just basically made One

[@somebodysomewhere2277]

The mistake was cutting off the high voltage winding instead of the low voltage winding...you need to keep the HV winding as primary and wind a new secondary for the high current........

[@somebodysomewhere2277]

@Dave M I've done it ...and mine worked....

[@believeornot12]

Dude! may be it too late now but to weld that thick of the steell you probably need a gas welder. Commercial electric welders can only weld thin metal. I am no expert in welding but for the metals to join, the contact areas need to be melted, literally.

[@parameshpavin2708]

Nice video on diy welding👌👍