DIY Spot Welding Machine
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- Опубліковано 31 січ 2013
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How to build a Spot Welder with a microwave oven transformer. Never connect the transformer to the grid before removing the secondary coil, because it produces 2000 Volts at 500 mA, this is LETHAL. A secondary with more turns than primary rises the voltage. On the other hand, a secondary with less turns lowers the voltage and put more amperes to draw. With a thick cable we make a 2 turns coil that delivers 2 or 3 volts and many many amperes. This is why the cable has to be very thick. - Наука та технологія
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.
You know, in short time the capacitors just discharge by themselves but yes, it is very dangerous.
U repair mickrowave for 30 years now ?????
@@husse843 I'm laughing
that is good advice but what does the magnetron high voltage capacitor look like and where is it? Also how do you discharge it?
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.
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.
Wonderful ingenuity! Thanks for sharing!
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).
Thank you. Do you think a copper pipe will make (after corect shaping) a decent electrode? Or is brass better still? Thanks again.
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.
hey, nice job there. have you tested the maximum thickness of metal plates this welder can weld?
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.
OK. Thank you!
grear advice on paint insulation , i once used plastic clear coat , but under abnormally high temps its not so good.🔧🔩👍
8
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.
this was a great video! lots of useful info here and i really enjoyed it! now i want to make one.
What open circuit voltage recommend, in the secundary?
Все гениальное просто , спасибо
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.
Very good, what is the measure of this cable you used in secondary?
muy buenos videos amigo, una pregunta que numero de cable es el que usa porfavor,,, saludos
Good morning in Thailand, thanks for showing me know
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?
hi great vid. what did you use for the electrodes? thanks.
Hollo, do you know the current for the primary with the secundary in short circuit.
looks cool I will have to give this a try
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?
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
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
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
NIIIICE!! what gauge wire did you use for the secondary?
what do you eat every day??.very amazing..thanks a lot for sharing this knowledge...
why did you leave the primary instead of the secondary? It's got way fewer loops -> less current transfered to the thick wire
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?
In what fuse have you connect in switch cabinet? 25Ampere, 35mpere?
P0
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.
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.
Removing the transformer shunts increases the available power but introduces a risk of core saturation and overloading the primary.
Just a quick question, what would happen if you didn't put the metal shunts back in?
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?
tenho um trasformado q era entrada de 380 e saida de 220 tirei o segundario de 220 e rnrrolei fio mas esquentou muito porq ?
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.
Don't you risk overloading the input when doing this or does the transformer current limit.
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?
1,5 turns.
Thank you
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?
Very very good job my friend 👍
this is fantastic this program.
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
I like very much your idea! A prototype of soldering! I from Argentina. :)
can i use this method for diy arc welder? 2 turns with big wire?
This was interesting.. but where were you twenty years ago when I could have used one of these... Thanks for the share... Merry Christmas!
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!
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.
Where do you get the primary, secondary part your taking apart? What did it come out of?
hello good video .... and a query to regulate current and amperage contienua about 20 amps? you need?
very nice! this could prove useful, and using wood seems a good approach
Totally Amazing! Damn Good! Thanks for sharing this most wonderful video. :-)
Lots of effort!! Kudos to your patience :)
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
Excellent! Harmless 2 or 3 volts of voltage output. But massive amps...
Thank you!
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
What gauge cord (yellow and green)did you use?
Would booster cables work as second winding?
This is the best preform video ever I saw on UA-cam ! Just found exactly what I wanted to see! GREAT JOB!!! good discription no bullshit no intro no nonsens AWESOME !!
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...
What is the output voltage and how many amperes are used at the input?
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).
Hi nice job. Only microwave transformer? The cable of secondary is 10mm2?
What can a microwave oven transformer
I replace the transformer UPS (universal processing unit)
I guess you could do secondary winding from copper brake line with shrink tubing and put coolant flow through it.
Thanks for the video guide, I've made one for 18650 battery welding
I made one from a microwave but I just can't weld battery packs worth a darn. One problem will weld one wouldn't. Dat one sided weld is not very good most time I almost burn a hole. And wen it seems like I'm making progress. I make a weld not a good one but a small start .I try to make another one. And nothing. I brush of the probes and I can make a one sided horrible weld. Den nothing. Brush of probes a one sided horrible weld. Wat can I do to improve.
where do you get these magnets? I'm interested on using the coil for making a levitation bed for an experiment - Lenz law
See this: Dancing Coils
Hello, do you know the current for the primary with the secundary in short circuit.
Tune in next week to find out how to build your own coffin & incerator...
+fluchter1996 ,,,,,how bout' it,,,joker........LMAO......thanks.....
😂😂😂😂
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 .⚡🔩🔧👍
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.
Aha, I spot my grind & clamshell MOT method. I'm pretty sure you learned how to do this from my videos, or ones like it :). Good job!
sir, whats the significance of putting the shunts back in the reassembly?
Thank you. I’m going to make one of these.
I removed the plates as well... Are they needed?
Gracias por compartir el vídeo. Muchas gracias...
Son necesarias las placas que separan los dos bobinados? Yo las tiré...
Sin las placas (Shunts) circula más corriente. Obtienes más potencia, pero también se te calentará más con lo que debes cuidar de utilizarlo periodos cortos.
@@tinkerbit gov will have all heads for this tech thay teach us that we always have loss but never talk about
the converted gain we can make from eletromagnets
if u convert all the wast thermal energy around
you u can use it universally as energy u need a true sine wave bipolar like the power comp dose a
true pure sinewave like a grid tie inverter
once the signal is made the system will turn on and
consume wast thermal energy from the
environment and space around you... there is free energy but it comes from Universal thermal loss and converted into a gain. so a pole Transformer and a
microwave Transformer have a common between each other u can take 2 microwave Transformer provide
a pure sine wave grid tie inverter to it or a true bipolar sinewave that inter acts with nature in
a perfect spherical motion like a flower of life.. if ur home provides this use it as a Source
signal then u can simply stack the Transformers on top of eachother in correct fasion and note
that the 1 wire on the Transformer must stay connected and the other disconnected your only useing
1 wire on the hi side .. so test ur self
2 microwave transformer stacked on top of eachother same face sides. one side 120 to the wall and the other 120 side to what u want to power and useing the
Transformer just the way it came out the microwave with the wire attached causes the energy in its
perfect spherical motion to converted wast thermal energy to amp for u hot to cold in to out...
should look a bit nuts with u use a form of wireless energy but its interacting with the environment...this is my work a compilation of Otis car. Tesla. and many other very smart people nowadays i think i found the gate source and drainif this gets out to much that it works the
power comp and mib will have our headsdont do this at home warning high voltage yet i cant stop u lol DO NOT TOCH THE CORES OR THE WIRES OK u will die make sure u dont touch the core if the hi wire is mounted to it u dont have to mount the hi on the core if u dont want u connect the 1 hi wire to the same side hi on the other transformer then the core should besafe to handle if nessary
@@tinkerbit gov will have all heads for this tech thay teach us that we always have loss but never talk about
the converted gain we can make from eletromagnets
if u convert all the wast thermal energy around
you u can use it universally as energy u need a true sine wave bipolar like the power comp dose a
true pure sinewave like a grid tie inverter
once the signal is made the system will turn on and
consume wast thermal energy from the
environment and space around you... there is free energy but it comes from Universal thermal loss and converted into a gain. so a pole Transformer and a
microwave Transformer have a common between each other u can take 2 microwave Transformer provide
a pure sine wave grid tie inverter to it or a true bipolar sinewave that inter acts with nature in
a perfect spherical motion like a flower of life.. if ur home provides this use it as a Source
signal then u can simply stack the Transformers on top of eachother in correct fasion and note
that the 1 wire on the Transformer must stay connected and the other disconnected your only useing
1 wire on the hi side .. so test ur self
2 microwave transformer stacked on top of eachother same face sides. one side 120 to the wall and the other 120 side to what u want to power and useing the
Transformer just the way it came out the microwave with the wire attached causes the energy in its
perfect spherical motion to converted wast thermal energy to amp for u hot to cold in to out...
should look a bit nuts with u use a form of wireless energy but its interacting with the environment...this is my work a compilation of Otis car. Tesla. and many other very smart people nowadays i think i found the gate source and drainif this gets out to much that it works the
power comp and mib will have our headsdont do this at home warning high voltage yet i cant stop u lol DO NOT TOCH THE CORES OR THE WIRES OK u will die make sure u dont touch the core if the hi wire is mounted to it u dont have to mount the hi on the core if u dont want u connect the 1 hi wire to the same side hi on the other transformer then the core should besafe to handle if nessary
@@tinkerbit gov will have all heads for this tech thay teach us that we always have loss but never talk about
the converted gain we can make from eletromagnets
if u convert all the wast thermal energy around
you u can use it universally as energy u need a true sine wave bipolar like the power comp dose a
true pure sinewave like a grid tie inverter
once the signal is made the system will turn on and
consume wast thermal energy from the
environment and space around you... there is free energy but it comes from Universal thermal loss and converted into a gain. so a pole Transformer and a
microwave Transformer have a common between each other u can take 2 microwave Transformer provide
a pure sine wave grid tie inverter to it or a true bipolar sinewave that inter acts with nature in
a perfect spherical motion like a flower of life.. if ur home provides this use it as a Source
signal then u can simply stack the Transformers on top of eachother in correct fasion and note
that the 1 wire on the Transformer must stay connected and the other disconnected your only useing
1 wire on the hi side .. so test ur self
2 microwave transformer stacked on top of eachother same face sides. one side 120 to the wall and the other 120 side to what u want to power and useing the
Transformer just the way it came out the microwave with the wire attached causes the energy in its
perfect spherical motion to converted wast thermal energy to amp for u hot to cold in to out...
should look a bit nuts with u use a form of wireless energy but its interacting with the environment...this is my work a compilation of Otis car. Tesla. and many other very smart people nowadays i think i found the gate source and drainif this gets out to much that it works the
power comp and mib will have our headsdont do this at home warning high voltage yet i cant stop u lol DO NOT TOCH THE CORES OR THE WIRES OK u will die make sure u dont touch the core if the hi wire is mounted to it u dont have to mount the hi on the core if u dont want u connect the 1 hi wire to the same side hi on the other transformer then the core should besafe to handle if nessary
@@tinkerbit gov will have all heads for this tech thay teach us that we always have loss but never talk about
the converted gain we can make from eletromagnets
if u convert all the wast thermal energy around
you u can use it universally as energy u need a true sine wave bipolar like the power comp dose a
true pure sinewave like a grid tie inverter
once the signal is made the system will turn on and
consume wast thermal energy from the
environment and space around you... there is free energy but it comes from Universal thermal loss and converted into a gain. so a pole Transformer and a
microwave Transformer have a common between each other u can take 2 microwave Transformer provide
a pure sine wave grid tie inverter to it or a true bipolar sinewave that inter acts with nature in
a perfect spherical motion like a flower of life.. if ur home provides this use it as a Source
signal then u can simply stack the Transformers on top of eachother in correct fasion and note
that the 1 wire on the Transformer must stay connected and the other disconnected your only useing
1 wire on the hi side .. so test ur self
2 microwave transformer stacked on top of eachother same face sides. one side 120 to the wall and the other 120 side to what u want to power and useing the
Transformer just the way it came out the microwave with the wire attached causes the energy in its
perfect spherical motion to converted wast thermal energy to amp for u hot to cold in to out...
should look a bit nuts with u use a form of wireless energy but its interacting with the environment...this is my work a compilation of Otis car. Tesla. and many other very smart people nowadays i think i found the gate source and drainif this gets out to much that it works the
power comp and mib will have our headsdont do this at home warning high voltage yet i cant stop u lol DO NOT TOCH THE CORES OR THE WIRES OK u will die make sure u dont touch the core if the hi wire is mounted to it u dont have to mount the hi on the core if u dont want u connect the 1 hi wire to the same side hi on the other transformer then the core should besafe to handle if nessary
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.
Estou tentando montar uma dessas, mas até agora só tive tempo para reconstruir o transformador...
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..
buen video mi amigo, porfavor me puede decir de que calibre es el cable y su amperaje.. saludos
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
What voltage can you get by feeding electricity to the secondary?
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 ?
240 turns primary and 2 secondary would be good enough?
Bravissimo ... che idea geniale! 5 Stelle !!!!
+giampiero murgia Grazie!
Very clever! Thank you!
Great spot welder!
That was so awesome!
Muchas gracias por el vídeo! Te quería hacer una pregunta, cuando se te ve desmontando el primero de los transformadores, y montas de nuevo el primario (reinstall primary) veo que hay una parte del circuito que no tiene esa protección de papel blanca a uno de los lados cuando lo montas... no pasa nada por eso? perdona mi pregunta pero no soy ningún entendido en temas de electricidad y más que nada es para seguir vivo mientras sigo tus pasos jejeje! De verdad gracias por el video es de gran ayuda
Transformátor nebylo potřeba demontovat a tento amatér zapoměl vložit izolaci mezi kostru trafa a cívku s nebezpečným síťovým napětím. Životu nebezpečné! Nejhorší práce, jakou jsem kdy viděl. Zkuste si najít jiná videa.
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
muy bueno gracias por su enseñanza amigo
You never stated what gauge wire you used for secondary (?).
What electrode you using? look like for Air pump hose or something.
I have to teach myself spot welding at work, and I've never done welding before. The electrodes on my welder are attached to chords (not like this clamp down setup). I just want to know, what are all the possible ways I can hurt or kill myself? Are gloves mandatory? And since I'm putting high voltage through metals, when can I hold the metal after a weld? Stupid questions but I want a heads up before I get electrocuted.
Would this work to spot weld aluminum?
how much amps did you got by putting a 2 turns thick cable ?
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.
How long is the cable used in millimeters and how long?
Please tell me the specification of input and output current
Thanks so much for the genious idea
Nice idea, i think i will use it some day. Just have to find an old free microwave :).
Btw, what is max thickness you can weld with this?
Not much, unless it is two bars crossed, because in this case the current can also pass through the point of contact of the two bars (like in rebar or construction steel).
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?
Yes to the wall 230 volts. No short circuit, but it heats ...
very informative keep up the good work
Thanks!
looks like all the DIY spot welders are the same. one or two microwave transformers and some fat wire connected to some mechanical contraption to make the weld. did any ever make one that works off the mains power?
What did you use as electrodes?
What is the red coated wire winding that is between the primary and the secondary windings used for?
I think is for the resistor wire of the magnetron.
your ammeter shows the secondary in excess of 400 amps. How do you get by using only #4 wire?