This is a excellent video on making a spot welder . Thank You! I have repaired microwave ovens for over 30 years . A cautionary note for anyone who is going to take apart a microwave oven for parts . There are high voltages with LETHAL CURRENT present inside microwave ovens. No Exceptions be sure microwave oven is unplugged and for extra safety short the magnatron high v. capacitor out. It has a bleeder resistor but do it anyway. A guy down the street opened his broken microwave to attempt fixing it. He reached inside and was electrocuted died on the spot.

@pikudopikao8425

7 жыл бұрын

You know, in short time the capacitors just discharge by themselves but yes, it is very dangerous.

@husse843

5 жыл бұрын

U repair mickrowave for 30 years now ?????

@stoneisland1000

5 жыл бұрын

@@husse843 I'm laughing

@tinkmarshino

5 жыл бұрын

that is good advice but what does the magnetron high voltage capacitor look like and where is it? Also how do you discharge it?

@FragBenitez

5 жыл бұрын

I just read this after dismantling a broken microwave oven, fishing for the transformer. Guess I'm lucky, but yeah I got a little cautious when I saw a big capacitor inside, thought to myself "I should have discharged that". I work with CRT monitors so I know this can be lethal.

I had read several welder tutos; I always found them a bit complicated for me; here, you show a very easy method, and I will build it very soon.

be very careful if you use the first method because you can easily damage the enamel insulation on the primary and cause a short circuit to the core. Paint the part of the primary that was in contact with the core with some nail polish or similar, and use a sheet of card or plastic to ensure that there are no shorts.

@tinkerbit

10 жыл бұрын

OK. Thank you!

@p0k7lm

4 жыл бұрын

grear advice on paint insulation , i once used plastic clear coat , but under abnormally high temps its not so good.🔧🔩👍

@panikkosmakkoutos7173

2 жыл бұрын

8

@milankral5891

6 ай бұрын

Lak to nezachrání. Tenhle návod nikdy nedělejte! Životu nebezpečné! Najděte si jiné video, toto je zatím to nejhorší, co jsem kdy viděl. Autora by měli uvěznit.

To doskonały film na temat tworzenia spawacza. Dziękuję Ci! Od ponad 30 lat naprawiam kuchenki mikrofalowe. Uwaga ostrzegawcza dla każdego, kto ma zamiar rozebrać kuchenkę mikrofalową na części. Wewnątrz kuchenek mikrofalowych obecne są wysokie napięcia z LETHAL CURRENT. Nie ma wyjątków, upewnij się, że kuchenka mikrofalowa jest odłączona, a dla dodatkowego bezpieczeństwa krótki jest kondensator o dużej pojemności. Ma rezystor upustowy, ale tak czy inaczej. Facet na dole otworzył złamaną kuchenkę mikrofalową, żeby spróbować ją naprawić. Sięgnął do środka i został porażony prądem, zmarł na miejscu.

Have you done any tests to see how thick the metal can be and still make a good weld? I have an old microwave transformer - might give it a go myself. A nice touch would be a microswitch that turns on the primary when the jaws are closed (safely insulated of course).

what would happed if i add turns to the first winding so it reaches half of the max possible windings volume, then remove the iron between primary and secondary and then fill the remaining space with 6-7 mm cable?

Removing the transformer shunts increases the available power but introduces a risk of core saturation and overloading the primary.

If you do two in series, you can make a stick welder. If you attach a RMS current regulator and high current diodes, you get even better results.

In what fuse have you connect in switch cabinet? 25Ampere, 35mpere?

@user-jh5mh7rn8o

5 жыл бұрын

P0

muy buenos videos amigo, una pregunta que numero de cable es el que usa porfavor,,, saludos

What open circuit voltage recommend, in the secundary?

tenho um trasformado q era entrada de 380 e saida de 220 tirei o segundario de 220 e rnrrolei fio mas esquentou muito porq ?

Hollo, do you know the current for the primary with the secundary in short circuit.

Very good, what is the measure of this cable you used in secondary?

What can a microwave oven transformer I replace the transformer UPS (universal processing unit)

This most likely has been asked, but I'd like to know how strong are the welds? I've been wanting to build this, and now I need some spot welding done on my car's front end for a part that is spot welded in that needs replacing. Will this be strong enough? It's for the radiator core brace

@jeffreydeutsch7336

7 жыл бұрын

Try it on a couple of pieces of scrap of about the same thickness. Nobody can predict what your transformer and your wire and your tips are going to do. Make a test weld and try to break it

nice video I tried to follow along with it and bought a used MOT, the seller connected ac voltage to the primary winding (thin wire side). And it created humming sound. At home I removed that side and when I connected ac to the secondary side it created smoke and smell and became very hot to touch. Seems like the Secondary was already short? What you say? Also Now can i rewind it using suitable size enameled wire? Will winding it with slightly thinner wire be ok for spot welding?

Thank you. Do you think a copper pipe will make (after corect shaping) a decent electrode? Or is brass better still? Thanks again.

can i use this method for diy arc welder? 2 turns with big wire?

hey, nice job there. have you tested the maximum thickness of metal plates this welder can weld?

Don't you risk overloading the input when doing this or does the transformer current limit.

hello I'm doing grant the machine you have in your video such as heco beam which does not have much power but I must be conectralo 220 v instead of connecting on 110 v the label says it must be connected to 110 v but as you remove the secondary transformer do not know if this changes or if I put thick cable is very thic

A copper alloy used for electro erosion electrodes. Is has cobalt and other metals also. Very conductive and harder and higher melting point than copper

Just a quick question, what would happen if you didn't put the metal shunts back in?

Would booster cables work as second winding?

Microwave oven transformers are great for projects because unlike some other transformers, the core is in an 'E I" format. So the 'I' limb can be removed easily. I made my new high current switch mode power supply (20A DC) using a re-wound microwave oven transformer. After cutting the core I clamped the 'I' part back on using two steel plates rather than re-welding. They're great for use as powerful electromagnets also. The primary can be run on low voltage DC with the secondary removed. A suppression diode should be used on any switching circuitry to protect semiconductors or contacts of relays.

@milankral5891

6 ай бұрын

Také jsem zkoušel zdroje postavit, zejména nabíječky a nikdy se to neosvědčilo jako když jsem si precizně navinul svoje spočítané trafo z originál plechů. Tohle má ohromné ztráty - i naprázdno je odběr okolo 3-4 A. Dá se to sice zregulovat elektronikou, ale ty ztráty jsou tam pořád. Jediné uspokojivé použití by bylo jako booster - pro krátkodobé použití k nastartování vozidla. Ale musíte použít pořádné 100-120 A diody + chladiče.

hello good video .... and a query to regulate current and amperage contienua about 20 amps? you need?

what is the specification of transformer required to generate low voltage high current power supply (shock proof) power supply to make spot welding machine please tell me...

Hello, do you know the current for the primary with the secundary in short circuit.

Wonderful ingenuity! Thanks for sharing!

why did you leave the primary instead of the secondary? It's got way fewer loops -> less current transfered to the thick wire

What gauge cord (yellow and green)did you use?

this was a great video! lots of useful info here and i really enjoyed it! now i want to make one.

good afternoon!!would it work for you to use the primary of the other transformer, as a secondary of the transformer you opened? in that case it would be 220v input and 220v output of the transformer, what do you think?

hi man good video if i want to make homemade arc welder which works 10VAC, then how many coils do i need for the secondary circuit ? thanks

What is the output voltage and how many amperes are used at the input?

What are the use of the shunts in the transformer?

@tinkerbit

9 жыл бұрын

Limit the current.

@AJRestoration

9 жыл бұрын

so in other words the thicker the shunts, the less amps you will have?

Where do you get the primary, secondary part your taking apart? What did it come out of?

Tune in next week to find out how to build your own coffin & incerator...

@arthureleclair29

8 жыл бұрын

+fluchter1996 ,,,,,how bout' it,,,joker........LMAO......thanks.....

@Appregator

5 жыл бұрын

😂😂😂😂

sir, whats the significance of putting the shunts back in the reassembly?

I guess you could do secondary winding from copper brake line with shrink tubing and put coolant flow through it.

how do I know which is the primary and which is the secondary? When you say you cut out the secondary did you do it with a grinder?

Would this work to spot weld aluminum?

woa i didn't know microwave trafos had magnetic shunts! I guess there's a reason they are such a popular item, the shunts makes them practically short-circuit proof just like a welding trafo, perfect for happy experimenting!

Thanks. I found it. Have you tried smaller wire such as #6 or #8 and using more windings? Or do you think that is not going to produce enough amperage? thanks.

Please tell me the specification of input and output current

made one but ii get short circuit and it blows the fuse when u connect the power to the transformer does it matter which one you connect the black wire and in which one u connect the

You never stated what gauge wire you used for secondary (?).

hi great vid. what did you use for the electrodes? thanks.

hi why you need to cut the steel i took the first easily and i saw you outing small pieces each way why on the top secondary line

what do you eat every day??.very amazing..thanks a lot for sharing this knowledge...

What Circuit is being used to power the transformer when the spot welding is being performed ? Direct connection between the Transformer and the power strip ?

what size of yelow wire can we use 2 metal nails ???

What voltage can you get by feeding electricity to the secondary?

Perhaos around 100 if you multiply the horizontal number of turns by the vertical...

240 turns primary and 2 secondary would be good enough?

What electrode you using? look like for Air pump hose or something.

The shorter the best. If you see pro spot welding machines photos, they have the electrodes very near to the trafo. My example has too much cable. If I had to use it a lot, perhaps I would shorten it.

where do you get these magnets? I'm interested on using the coil for making a levitation bed for an experiment - Lenz law

@tinkerbit

9 жыл бұрын

See this: Dancing Coils

I'm building something like this but I have a question I can't quite figure out, in your thick wire secondary coils would that be considered 1 or 2 turns around?

@tinkerbit

9 жыл бұрын

1,5 turns.

@TheFirefox780

9 жыл бұрын

Thank you

@theophrastusbaumast5936

6 жыл бұрын

mopatin Im building a spot welder.... i removed the secondary coil from the MOT...... however, i also removed the insulation between the secondary and the inside wall of the transformer. I noticed your first method didnt have insulation between the weld cable and the walls of transformer. The primary insulation is fine, the secondary is gone however. I am using 32mm welding cable as i couldnt find 35mm yets its pretty thick. I beleive 32mm translates to 2 gauge i believe. Two questions......shoukd i insulate the inner walls before winding in my welding cable with say electrical tape and possible cardboard? Second, you think 32mm welding cable is sufficient?

Can anyone explain to me hoe electricity it getting through to the connectors? The wire is isolated and not touching 🤔

How long is the cable used in millimeters and how long?

great job 👍 , tnx 4 vid ! when i build mine i will try using carbon rods for electrodes .⚡gringing the core is the way to go instead of cutting apart the valuable useful copper secondary, as for the buzz core sound ( not anoying ) it indicates its powered up .⚡🔩🔧👍

NIIIICE!! what gauge wire did you use for the secondary?

Can we use wiring wire which is little bit thin with more turns reply soon

What is the red coated wire winding that is between the primary and the secondary windings used for?

@tinkerbit

8 жыл бұрын

I think is for the resistor wire of the magnetron.

when i was removing mot secondary winding i damaged the primary winding of mot could you tell me how many turns and layers required in mot primary winding plz reply there is no answer of my question on internet.

The shunts are there for some current limitation so I don't think they need to be kept, especially in this case, when we need as high current as possible.

What is the size of the wire you used in this ...

will it be ok to plug in the 120 volts transformer into 220volts power suplly after i rewinding the secondary coil and make a metal melter?..sorry but i dont have a lot of knowlege about electricity..

if I have trafo example 12v, how I can fing how much watts and amp have? allegedly its 1w per 1cm, but I dont know, how they mean it :D its 1 cm2 or 1 cm3...?

buen video mi amigo, porfavor me puede decir de que calibre es el cable y su amperaje.. saludos

@MichelOcampo

4 жыл бұрын

A ver... En primera que te hace creer que te va a responder tu pregunta escribiendola en español y en segunda, si pones ATENCION al principio del video da un aproximado del cable que usa... Hay que ser mas observadores colega para no hacer preguntas inecesarias. Peace

Good morning in Thailand, thanks for showing me know

Dear this transformer befor run on the Ups pc ?

so if i make huge coil of thin un insulated wire then put very short coil of larger wire then touch the contacts of short coil when powered it will short out and make crap ton of heat?

@jameslawrence8734

8 жыл бұрын

+Eclipse Gaming no, both coils must be insulated. it looks to not be insulated because it is coated in a clear/nearly clear substance. otherwise, pretty much summed it up.

What happens if i use 1.5 gauge or 2.5 gauge wire instead of 2 gauge wire tell me ?

0:50 what's the reason to connect original transformer secondary coil to main is fatally dangerous? Wouldn't that making the transformer a step down and very low voltage per turn one? Not of much use as the power will be extremely low but didn't see the dangerous.

hola amigo angelito puedo tener con un transformador de microondas una tension de salida 440vol y alimentarlo con 220vol y que mu soporte 30 amp...gracias amigo angelito

Все гениальное просто , спасибо

Secondary, the wire is much thinner. You can cut it with an utility knife. Do several cuts and draw the cut wires with pliers. Cut again and draw, and so on.

Thank you!

if i do it direct with builtin secondary with 110 converter can i do it or not.

Question: Where does the power come from at 1:40 ? is the cable you can see below just plugged in to the wall? wouldnt that short the circuit?

@tinkerbit

3 жыл бұрын

Yes to the wall 230 volts. No short circuit, but it heats ...

Can you please tell me what's the input and output of this transformer used

@tinkerbit

3 жыл бұрын

The output is the thick cable

Ciao di tutti i video che ho visto il tuo video è il migliore in assoluto per il fai da te perché sei di una semplicità strabiliante complimenti poi uno lo personalizzo come vuole Ma sei davvero brava a spiegare

Soo how did you wire it for power???

what these shunts are use for?

No, I haven`t. Since the distance between the tips is very short and the iron plates to weld are thin the resistance is low so I think you dont need more voltage. You needs Amps.

Can i ask question what is the supply of sour it is 220v ac or 12 volt dc?

@tinkerbit

2 жыл бұрын

220 V

How can j get that type of welding machine

I have seen your video and yes I did the same thing. I would like to ask you this: I did not put the shunts, instead I got 2,5 turns of cable in the secondary. Some people say put the shunts and some not. And I am asking anyone who knows why to put or not to put them.Are some reasons for it?Shunts are from several of mettalic shims, but they dont touch the transformer frame because they are covered with tape.

Was verbraucht das an Strom, könnte man damit eine Heizung bauen?

No, the primary, the mains side, has to be rated at your outlet voltage. the secondary, the output side you can do what ever you want with it, it will not effect the primary as it is set to give a set amount of power thru the core. However the secondary is your own design, so you could over do things on that side.

El hilo está recubierto de una laca aislante con lo que no tiene por qué haber ningún problema. Supongo que ese papel blanco es para proteger más y para que encaje bien y no se mueva. Siempre hay que actuar con sentido común. Esto está pensado y dimensionado para un microondas y no para un soldador, con lo que deberemos estar bien atentos que no se caliente. No es para un uso continuado o industrial sino más bien entre casero y experimental.

How do you get electricity to the new wire by wrapping it where the old one was?

@tinkerbit

9 жыл бұрын

Induction. Electromagnetic Induction Demo

qual bitola do fio que enrola no trafo ??

your ammeter shows the secondary in excess of 400 amps. How do you get by using only #4 wire?

This has been done before taken from a user on Instructables... This is a simple hack but leaves no safety regulations or fire-control hazards. Adding some sort of temperature detector would be a good safeguard as well as a capacative field indicator in case someone's finger came too close to the contact. Very simple to do and only need a High Power Mosfet to switch of the Primary... One last thing would is to shield it, ( Magnetic Field, any metal on you is a path to ground).

This was interesting.. but where were you twenty years ago when I could have used one of these... Thanks for the share... Merry Christmas!

@tinkerbit

5 жыл бұрын

20 years ago I was preparing for my future and beggining working. And after that I could afford to do things I like like this in my spare time. Merry Christmas for you and your family too!

very nice! this could prove useful, and using wood seems a good approach