I'm 15 and my dad has a welder but i love working on things like these so i will make one, NOTE: i am not a stupid teenager! I love learning so i will read up tons of info about making mot welders and safety when using transformers
In rewinding MOT secondaries for low voltage loads like welders, etc, I use strip copper flashing metal which is used in roofing construction. You cut the strips about 1/8 inch narrower than the width of the coil, cover one side with a teflon fabric tape insulation and wrap the desired number of turns around the core. This wide, flat "wire" has enormous current capacity with a very compact density and low heat loss. Strips are soldered end to end to get the preferred length. As long as the solder joints are made to lay outside the core and a small gap left between layers for air circulation they don't negatively affect the winding. I've run as low as a couple of volts and as high as 75 volt, high current loads with no problems. and it's a lot easier to work with than wire.
I actually made an isolation transformer out of these. I took two of them apart, and put the primaries into one transformer. And i also put the secondaries into the other one, so now it is a high voltage isolation transformer.
I really dont understand why people have to be such pricks! this video along with others helped me make my own spot welder thanks for taking the time to show us how to do this! I am very appreciative !! thanks bro! awesome video!
Those iron spacers are called SHUNTS. They are current limiting shunts. MOTs have 100 turn primary coils while a typically equivalent transformer has 200 turn primary coils. 200 turn primary will pull about 2 amp idle current with no load, the 100 turn primary will pull 12 amps idle current with no load. The shunts limit the current to 12 amps. Without the shunts current can go up to 25 amps and burn up the primary coil in 3 or 4 minutes. Shunts are a safety current limiting device for the 100 turn primary coil. If you plan to use the 100T primary coil you should use the shunts too. I often use MOTs just for the metal laminates to build audio transformers and power transformers for tube amplifiers. I replace the 100 turn primary with a 200 turn primary then shunts are not needed. I can still get 1500 watts out of the 1500 watt transformer. If I use 1/3 of the metal laminated my new transformer will be 500 watts. The 100 turn primary is a cool trick that makes the magnetron tube start instantly. A magnetron will not start at 2 amps so the microwave oven will never come on.
Lowracerman Yes it Would be nice to see your setup for winding 200 turns. Also could you just add some windings to the org. primary. I saw another vid with a guy adding like 60 turns and it dropped the amps at idle a great deal.
Yes, I read that microwave transformers work in that mode. I just measured the current in a primary coil in idle mode and it was about 8.3A, which I think is still very high for IDLE mode. Is it OK for microwave transformer or there is a problem with primary coil?
burn down house = bad haha I do plan on building a SPOT welder using a old/ new microwave transformer I have all the stuff and I am ready to build. nice video and GREAT info thanks..I will do a video on it . thanks for the info and thanks for the video
There's a guy on UA-cam that made one from a old lawn tractor and a alternator and did a awesome job on it. He even put electrical outlets on it to power tools.
Drill and cut them out. Wind 20 turns on each one with 10 nice and neat. Mine works great. Good video. Too. I literally have nothing but time in mine. And works great
A lot of these transformers are wound with aluminum wire, very soft and easy to cut but not as efficient. The enamel they use to provide insulation is tinted amber to make them look like copper. They will work but cost more to run and of course they have no salvage value.
I noticed this on the first one I tore apart! So I'm like wtf... I want some copper windings... not this cheap shit. So I found an OLDER microwave, and that one's transformer had copper windings. The aluminum windings were WAY easier to remove than the copper ones though. I used an air chisel, hammer and punch to remove the old secondary. So now I got some 2/0 welding cable ordered to make the secondary out of.
This was a long time ago, but it was the first time cutting the welds, I used to just chisel the secondary out than wrap in a heaver gauge wire or laminated field wire in. I used to build transformers from motor stators, just for educational entertainment content not for practical use.
Continuing, I am attempting to build a spotter for dent pulling. It is a handle with an electrode of some sort and a spring loaded switch. You touch the electrode to the dent then depress the switch and the electrode welds itself to the dent. Then you pull out the dent. Then twist the electrode and it releases itself from the weld.
Hello I'm french and I saw your video , good job ! =) I've just one question : Can I do Electric "arcs" or big big sparks with your system ? i don't know how to translate this sorry It is possible ? thank you ! you do good job bye ! answer me please !
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? Current winding is using 0.9mm enameled copper wire and the length and breadth of cross sectional area is 15 by 17 mm..
How did u wire it up i mean if you wire the ground and hot to the same coil thats a direct short so if you can show that part of the process id appreciate it
Thank you , I had a feeling that those are not spacers , That they had something to do with the alternating current flux and something to do with reducing eddy currents but I couldn't figure out what those parts are called , So without those flux shunts , The transformer would burn out , Correct?
I just thought of a way to produce multiple amounts of current/voltage out of the transformer(a simple modification): create a few taps(I figure high quality/temperature crimp ferrules are safe and simple) on the "secondary" winding. That way, the secondary coil is a single, continuous, conductor (without any breaks). Therefore, eliminating a lot of failure points. Then you connect each tap to a high current rotary switch. Or you could have each tap terminated at a high current output jack. You just plug yir "stinger" into the jack with the corresponding amperage that you desire. Hey, I ain't no Electrical Engineer, Electrician, or even some kind of wire/electron guru...I DON'T KNOW JACK! So, shoot my idea down if it sucks. Especially if somebody could get zapped. Hey, yir "Death-o-Rac" may be the best method of adjusting the output current. And a few welder "jacks" may cost too much. ...just some ideas... BTW, great video!
thanks for the vid mate really good will definetly be giving this a try even though you said not to lol sheet metal worker by trade and will be showin this around cheers
Hey Kurt I think if I put a taut nichrome metal wire between the secondary terminal ends that I can make this into a simple homemade hot wire foam cutter. I think because of the low voltages it would be a safer than most unit out there, what's your opinion on that.
enviro1001 Depending on the length of the nichrome wire a laptop transformer should be enough. I can test that the day after I write this comment if you're still interested. BTW, check out The King of Random channel's, he made of that look very professional
Those aren't iron spacers. They serve a puropse.... It has something to do with limiting the magnetic field and not letting the transformer field not saturate..... They use them in neon sign transformers too....
SPOT WELDERS ARE 145.00 DOLLARS TO ME THAT IS A LOT OF CASH,IF I CAN BUILD ONE WITH A MICROWAVE TRANSFORMER I WOULD RATHER DO THAT,BROTHER .THANKS FOR THE TUTORAL.
145 dollars and safe, try this without knowing exactly whats going on and your house burn down is a little bit more than 145 dollars, i'd do the sums on saving the cash if i were you before trying this. have a great day. dan
I found a working microwave next to a trash can the other day. free is a lot cheaper than $145. but Dan is right about one thing. you better know what you're doing if you go this route. Or if you weld at all for that matter.
What would happen if you wove windings of different diameter wires in the valleys of the E frame so that your primary coil powered both an amp coil and a volt coil? Could you splice them together to make a more powerful system?
Do you have to put the metal spacers back in when you rebuild? The ones between the windings? Or, would you be ok setting your wire directly on top of the winding?
I see that the transformer you converted into a step down voltage transformer arc welder ... basically an ac arc welder with one voltage/current setting defined by how many coils in the secondary you put. Nice work i guess the next step is to add a potientiometer based knob so you can get different voltages or currents.... Curious does the spot arc welder you create also do continous beads or welds ... or is it just spot welds?
I'm just guessing, but I think the voltage on these would be to low to maintain an arc for any other welding process. If you were to get the voltage up in the teens or higher (by adding more turns of wire to the secondary), then it could work for stick welding.
As long as the voltage is low , It is much safer than connecting it to 120 volts or higher , But beware that the transformer may have a duty cycle on it which means it is not for continuous use , Unless the wire you're using as the heating element has enough resistance to not overload the transformer , If the transformer gets hot to the touch , Shut it off and let it cool before using again Transformers take quite a while to cool off due to the dense steel core , A fan will cool it faster
I made a spot welder, but it doesn't weld at all! I't capable to melt a wire or nails but the welding part isn't what it should be. (I am experienced in high voltage and I've built Jacob's Ladder and 2 MOT as as spot welder - it works great!) BUT I want to spot-weld 18650 batteries, that is all. It just doesn't work at all - any suggestions? Thank you.
قبل 3 ساعات why we must use a microwave oven transformer and not any other transformer for spot welder,and what are the characters that made it the most suitable for such project?...thanks
+المهندس ضرغام الجاسم The microwave transformers are abundant, and of sufficient size. With a direct unregulated load the transformer will completely saturate, so you want a large enough core. I wouldn't cut the I from the E as you can create undesirable effects if not done right. It is easy enough to just cut and hammer the secondary out.
Can you help me. I wired one of these with 12 ga wire and it welded great for 20 seconds. Then the 12 ga wire began to get hot and smoke. I rewired it again and the same thing happened. What am I doing wrong.
Mike K If you have smaller gauge wire, you need to use more wires connected together, to handle the AMPs. Thus, I would say that you need three 12 ga to four wires, all bound together at one end, wrapped around as one thick wire, then bound together on the other end. (There is a conversion, google amperage and wire gauges. Actual values are not important, it is the ratio from one to another. Going from 12 ga to 6 ga may be 4x more amps, thus, you simply need 4x more 12 ga to equal the same amps as 6 ga wire.) The reason they have other sizes of wire, besides for simplicity, is because each wire has roughly the same thickness of sheathing. Thus, you will have 4x the sheathing, and can get less wraps. This is why magnet-wire uses micro-thin sheaths of plastic/enamel/mica, to fit more wire in less magnetic space. Dumpsters have great solid-copper home wires with thin sheathing. It is great for this stuff. Better than thick-sheathed jumper-cables and speaker-wire. Plus, the sheath is designed for high-amps and heat, unlike rubber/plastic battery-cables with low-grade sheaths made for "abrasion resistance" and "fake thickness to look like expensive wire".
hi i am a mechanical engineering student i am constructing spot welding machine as a project so please guide me electrically in the construction of low voltage(shock proof) high current converting transofrmer please help me
Sajid Rafique : To me 1989 really wasn't too long ago and I never ever think about it in a "Back in the day" kind of way. Maybe had you simply used the word "younger" instead of "young" your comment would not have stood out as much to me. But to me I felt as if I was reading about something you made about 75 years ago. Well that and also when I think of myself as being young, that is when I was about 1-15 years old. I would never refer to me in my twenties as when I was young, even though I was younger then. I would refer to me in my twenties as something I did when I was in my twenties. Words are weird like that to me. The same way using '20s and twenties can illicit different responses. I'm sorry if it seems like I am crapping all over your comment as that was not my intention whatsoever. K, enough said.
You went on a rant because he should of said "younger" instead of "young", that is really sad, Sajid wanted to share his creation with us and that is your complaint? you need to work on that it is seriously SAD!
Do not cut the core of the MOT if you are gonna wrap less than 30 turns. It's not good idea. First of all you reduce transformer performance by 10 % or more, depends on how you put it back together, also the noise is ridiculous.
Who cares if it's less efficient? Also, the noise can be easily controlled by wrapping the wires in tape tightly so they are extremely snug in the transformer.
Bit late but here goes: Make it Extreme channel recently posted a spot welding video using two transformers in tandem. They show the power of one then both. I made a spot welder with a single transformer using welding wire at 2 turns as secondary. It dossnt have enough current, takes long time to hold and doesn't weld well.
Dude..... That was painful to watch..... You are going to get somebody killed.... Use a SURGE PROTECTOR to turn it on and off. Another safety precaution is to salvage the light bulb and put it in the main power supply line so when you turn on the MOT, a light turns on with it.... and is a signal that there is a need for caution.
This video showing you the HARDEST way to take apart a transformer for making a Spot Welder.... Hahahahahahahahaha You don't need to take it apart at all.. Hahahahahahahahahaha
Anyone w/o knowledge of electricity & what it can do, will be in a world of hurt. 100mA is painful enough. It is actually the current, that will do significant damage or even send someone into cardiac arrest with just one screw-up let alone a few. Going into V-Fib(Ventriclular Fibrillation) is not good by any means. That or just an M.I. (Myocardio Infarction) would be the least of your worrys. If in doubt, don't attempt it. I myself have been jolted with 500 V, but only required muscle relaxers (no, it was not related to transfomer work).
Making a video showing how to build a spot welder then advising everyone not to attempt it so you won't be held responsible for electrocution is as idiotic as showing a video how to make crack cocaine and claiming. "You didn't hear it from me." I will follow your directions to the 'T' and make a spot welder. If I get electrocuted I am holding you responsible. Ha!
Tucker Not Sucker! The government shows videos on how to duck under tables for nuclear protection, and told everyone that eating carrots gave the military better eyesight, and that marijuana kills and causes rape... I think he can make whatever disclaimer he wants. That is kind-of the purpose of a disclaimer. Showing someone how to skydive, and pushing them out of a helicopter are not the same thing. He is showing you how to skydive, you jump, it's your responsibility. Blaming others is YOU failing to take responsibility for YOUR actions. Grow-up, you aren't 5 anymore, no-one is responsible for your actions except yourself. (Look-up kids that kill, and tell me who is responsible, the kid or the parent... Even 5-yr olds are responsible for their actions.)
+the electronic man I'll be doing this soon. Love home made tools, especially if electricity is involved. But I've been playing and working around power for over 30 years. So Kurtscottage is right if you don't know what your doing, eh don't do it. Best Wishes n Blessings Keith
I'm 15 and my dad has a welder but i love working on things like these so i will make one, NOTE: i am not a stupid teenager! I love learning so i will read up tons of info about making mot welders and safety when using transformers
How did you go?
Are you still into electronics?
In rewinding MOT secondaries for low voltage loads like welders, etc, I use strip copper flashing metal which is used in roofing construction. You cut the strips about 1/8 inch narrower than the width of the coil, cover one side with a teflon fabric tape insulation and wrap the desired number of turns around the core. This wide, flat "wire" has enormous current capacity with a very compact density and low heat loss. Strips are soldered end to end to get the preferred length. As long as the solder joints are made to lay outside the core and a small gap left between layers for air circulation they don't negatively affect the winding. I've run as low as a couple of volts and as high as 75 volt, high current loads with no problems. and it's a lot easier to work with than wire.
I actually made an isolation transformer out of these. I took two of them apart, and put the primaries into one transformer. And i also put the secondaries into the other one, so now it is a high voltage isolation transformer.
Don't cut the laminated core. Use and oscillating tool ( saw ) and cut off the secondary wires and push them out of the core. Very fast.
I really dont understand why people have to be such pricks! this video along with others helped me make my own spot welder thanks for taking the time to show us how to do this! I am very appreciative !! thanks bro! awesome video!
Those iron spacers are called SHUNTS. They are current limiting shunts. MOTs have 100 turn primary coils while a typically equivalent transformer has 200 turn primary coils. 200 turn primary will pull about 2 amp idle current with no load, the 100 turn primary will pull 12 amps idle current with no load. The shunts limit the current to 12 amps. Without the shunts current can go up to 25 amps and burn up the primary coil in 3 or 4 minutes. Shunts are a safety current limiting device for the 100 turn primary coil. If you plan to use the 100T primary coil you should use the shunts too. I often use MOTs just for the metal laminates to build audio transformers and power transformers for tube amplifiers. I replace the 100 turn primary with a 200 turn primary then shunts are not needed. I can still get 1500 watts out of the 1500 watt transformer. If I use 1/3 of the metal laminated my new transformer will be 500 watts. The 100 turn primary is a cool trick that makes the magnetron tube start instantly. A magnetron will not start at 2 amps so the microwave oven will never come on.
Lowracerman Thank you so much. It would be awesome to see a video of you building audio transformers and explaining the process/tips.
Lowracerman Yes it Would be nice to see your setup for winding 200 turns. Also could you just add some windings to the org. primary. I saw another vid with a guy adding like 60 turns and it dropped the amps at idle a great deal.
dude you really should start a youtube thing with that, I would tune in for sure.
Wow... great information! THANKS! :)
Yes, I read that microwave transformers work in that mode.
I just measured the current in a primary coil in idle mode and it was about 8.3A, which I think is still very high for IDLE mode.
Is it OK for microwave transformer or there is a problem with primary coil?
burn down house = bad haha I do plan on building a SPOT welder using a old/ new microwave transformer I have all the stuff and I am ready to build. nice video and GREAT info thanks..I will do a video on it . thanks for the info and thanks for the video
That transformer was in water for awhile. I would of used a transformer that was rust free for your nice video. NICE JOB . TX YOU.
There's a guy on UA-cam that made one from a old lawn tractor and a alternator and did a awesome job on it. He even put electrical outlets on it to power tools.
Bravo ottimo lavoro 👍😁🤝🔋
Steel screw drive will scratch primary coil if your not careful maybe a better choice would be a rubber hammer. Overall good diy video thanks.
Very good video, thanks for sharing.
That is how it's done period great video "kurtscottage"
Love your editing, “these transformers are very dange” ha ha, great tutorial.
Instablaster...
@@darwinskylar1004 ???
Drill and cut them out. Wind 20 turns on each one with 10 nice and neat. Mine works great. Good video. Too. I literally have nothing but time in mine. And works great
A lot of these transformers are wound with aluminum wire, very soft and easy to cut but not as efficient. The enamel they use to provide insulation is tinted amber to make them look like copper. They will work but cost more to run and of course they have no salvage value.
I noticed this on the first one I tore apart! So I'm like wtf... I want some copper windings... not this cheap shit. So I found an OLDER microwave, and that one's transformer had copper windings. The aluminum windings were WAY easier to remove than the copper ones though. I used an air chisel, hammer and punch to remove the old secondary. So now I got some 2/0 welding cable ordered to make the secondary out of.
Cutting through the laminated plates is NUTS! Is this the first time you have ever done this?
This was a long time ago, but it was the first time cutting the welds, I used to just chisel the secondary out than wrap in a heaver gauge wire or laminated field wire in. I used to build transformers from motor stators, just for educational entertainment content not for practical use.
Continuing, I am attempting to build a spotter for dent pulling. It is a handle with an electrode of some sort and a spring loaded switch. You touch the electrode to the dent then depress the switch and the electrode welds itself to the dent. Then you pull out the dent. Then twist the electrode and it releases itself from the weld.
Hello I'm french and I saw your video , good job ! =) I've just one question : Can I do Electric "arcs" or big big sparks with your system ? i don't know how to translate this sorry It is possible ? thank you ! you do good job bye ! answer me please !
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? Current winding is using 0.9mm enameled copper wire and the length and breadth of cross sectional area is 15 by 17 mm..
Awesome job! Very educational, thanks.
Good job.
How did u wire it up i mean if you wire the ground and hot to the same coil thats a direct short so if you can show that part of the process id appreciate it
Thank you , I had a feeling that those are not spacers , That they had something to do with the alternating current flux and something to do with reducing eddy currents but I couldn't figure out what those parts are called , So without those flux shunts , The transformer would burn out , Correct?
I just thought of a way to produce multiple amounts of current/voltage out of the transformer(a simple modification): create a few taps(I figure high quality/temperature crimp ferrules are safe and simple) on the "secondary" winding. That way, the secondary coil is a single, continuous, conductor (without any breaks). Therefore, eliminating a lot of failure points. Then you connect each tap to a high current rotary switch. Or you could have each tap terminated at a high current output jack. You just plug yir "stinger" into the jack with the corresponding amperage that you desire. Hey, I ain't no Electrical Engineer, Electrician, or even some kind of wire/electron guru...I DON'T KNOW JACK! So, shoot my idea down if it sucks. Especially if somebody could get zapped. Hey, yir "Death-o-Rac" may be the best method of adjusting the output current. And a few welder "jacks" may cost too much. ...just some ideas... BTW, great video!
nice job on the vid thanks
It may have been a good idea to do electrolysis on the rusted laminates to clean them up.
thanks for the vid mate really good will definetly be giving this a try even though you said not to lol sheet metal worker by trade and will be showin this around cheers
Hey Kurt I think if I put a taut nichrome metal wire between the secondary terminal ends that I can make this into a simple homemade hot wire foam cutter. I think because of the low voltages it would be a safer than most unit out there, what's your opinion on that.
enviro1001 Depending on the length of the nichrome wire a laptop transformer should be enough. I can test that the day after I write this comment if you're still interested.
BTW, check out The King of Random channel's, he made of that look very professional
Great vídeos Sir .thanks
Thanks
nice
Those aren't iron spacers. They serve a puropse.... It has something to do with limiting the magnetic field and not letting the transformer field not saturate..... They use them in neon sign transformers too....
Virtualgod2009 I know... in essence, it is to keep the core from saturating... shunts are also in neon sign transformers.
SPOT WELDERS ARE 145.00 DOLLARS TO ME THAT IS A LOT OF CASH,IF I CAN BUILD ONE WITH A MICROWAVE TRANSFORMER I WOULD RATHER DO THAT,BROTHER .THANKS FOR THE TUTORAL.
145 dollars and safe, try this without knowing exactly whats going on and your house burn down is a little bit more than 145 dollars, i'd do the sums on saving the cash if i were you before trying this.
have a great day.
dan
Dan Allured why the anti experimenter wet blanket attitude Mom? Afraid we will put an eye out?
I found a working microwave next to a trash can the other day. free is a lot cheaper than $145. but Dan is right about one thing. you better know what you're doing if you go this route. Or if you weld at all for that matter.
What would happen if you wove windings of different diameter wires in the valleys of the E frame so that your primary coil powered both an amp coil and a volt coil? Could you splice them together to make a more powerful system?
You do not need to cut adapter if you will be using a small number of laps, 3 laps or 6 laps and the introduction of the new file without problems
Thank You good video.
Use JB Weld or an epoxy and clamp it, should be alot better thin that strapping. It'll be more stable also.
Do you have to put the metal spacers back in when you rebuild? The ones between the windings? Or, would you be ok setting your wire directly on top of the winding?
I noticed when Grant Thompson rewound this transformer with the really thick cable, he had the spacers (shunts) removed on his.
I just uploaded a video to my channel of how a microwave transformer is correctly modified
I see that the transformer you converted into a step down voltage transformer arc welder ... basically an ac arc welder with one voltage/current setting defined by how many coils in the secondary you put. Nice work i guess the next step is to add a potientiometer based knob so you can get different voltages or currents.... Curious does the spot arc welder you create also do continous beads or welds ... or is it just spot welds?
I'm just guessing, but I think the voltage on these would be to low to maintain an arc for any other welding process. If you were to get the voltage up in the teens or higher (by adding more turns of wire to the secondary), then it could work for stick welding.
... I wonder if you could make two and use them to weld the cute
why on most videos the people just cut out the step up coil windings if they need to reuse them, like you said.
As long as the voltage is low , It is much safer than connecting it to 120 volts or higher , But beware that the transformer may have a duty cycle on it which means it is not for continuous use , Unless the wire you're using as the heating element has enough resistance to not overload the transformer , If the transformer gets hot to the touch , Shut it off and let it cool before using again Transformers take quite a while to cool off due to the dense steel core , A fan will cool it faster
I made a spot welder, but it doesn't weld at all! I't capable to melt a wire or nails but the welding part isn't what it should be. (I am experienced in high voltage and I've built Jacob's Ladder and 2 MOT as as spot welder - it works great!) BUT I want to spot-weld 18650 batteries, that is all. It just doesn't work at all - any suggestions? Thank you.
Increasing the voltage I understand. ..the amperage is what I need to increase as well.
You can wind two secondaries, one with more winds than your primary and one with fewer winds. Its your call as to which one you use.
You have made the microwave transformer welders but you should really make a alternator welder.
I want to put a button switch, between the little red wire and the primary. Is this correct?
is it important to put back the spacer, (the iron flat bar between the two coils) what problem will it cause if it will not return?
The Shunts limit Eddy currents through the laminated core.
Sooo cool man!
Great!
Can you make a video on how to fix a wire wound magnetic ballest ?
Do not try this at home ? Really ? Where were you when you did this ?
do what I say, not what I do.
+Saint Barthélemy Do it at your buddys and let your buddy make his at yours. loophole.
Exactly!!
If I were to damage the primary coil by breaking one of the wires could I just solder the two ends back together?
yes you can
Can i use the same transformer to weld itself back together afterwards?
قبل 3 ساعات
why we must use a microwave oven transformer and not any other transformer for spot welder,and what are the characters that made it the most suitable for such project?...thanks
+المهندس ضرغام الجاسم they was free lol
+المهندس ضرغام الجاسم The microwave transformers are abundant, and of sufficient size. With a direct unregulated load the transformer will completely saturate, so you want a large enough core. I wouldn't cut the I from the E as you can create undesirable effects if not done right. It is easy enough to just cut and hammer the secondary out.
correct
Can you please tell if you measured current in primary coil in the idle mode and what it was?
hi mate, is the secondary thick wiring is clockwise or anti clockwise
Reply
no defiant
Can you help me. I wired one of these with 12 ga wire and it welded great for 20 seconds. Then the 12 ga wire began to get hot and smoke. I rewired it again and the same thing happened. What am I doing wrong.
Mike K If you have smaller gauge wire, you need to use more wires connected together, to handle the AMPs. Thus, I would say that you need three 12 ga to four wires, all bound together at one end, wrapped around as one thick wire, then bound together on the other end. (There is a conversion, google amperage and wire gauges. Actual values are not important, it is the ratio from one to another. Going from 12 ga to 6 ga may be 4x more amps, thus, you simply need 4x more 12 ga to equal the same amps as 6 ga wire.)
The reason they have other sizes of wire, besides for simplicity, is because each wire has roughly the same thickness of sheathing. Thus, you will have 4x the sheathing, and can get less wraps. This is why magnet-wire uses micro-thin sheaths of plastic/enamel/mica, to fit more wire in less magnetic space.
Dumpsters have great solid-copper home wires with thin sheathing. It is great for this stuff. Better than thick-sheathed jumper-cables and speaker-wire. Plus, the sheath is designed for high-amps and heat, unlike rubber/plastic battery-cables with low-grade sheaths made for "abrasion resistance" and "fake thickness to look like expensive wire".
hi i am a mechanical engineering student i am constructing spot welding machine as a project so please guide me electrically in the construction of low voltage(shock proof) high current converting transofrmer please help me
You want to see my spot welding system I tried to go into business with ? I made it 100% in 1989 when i was young . Very professional looking .
incredabill1 I sent you a picture of the system . The weld head has a ball bearing precision slide .
Sajid Rafique : To me 1989 really wasn't too long ago and I never ever think about it in a "Back in the day" kind of way. Maybe had you simply used the word "younger" instead of "young" your comment would not have stood out as much to me. But to me I felt as if I was reading about something you made about 75 years ago. Well that and also when I think of myself as being young, that is when I was about 1-15 years old. I would never refer to me in my twenties as when I was young, even though I was younger then. I would refer to me in my twenties as something I did when I was in my twenties. Words are weird like that to me. The same way using '20s and twenties can illicit different responses. I'm sorry if it seems like I am crapping all over your comment as that was not my intention whatsoever. K, enough said.
You went on a rant because he should of said "younger" instead of "young", that is really sad, Sajid wanted to share his creation with us and that is your complaint? you need to work on that it is seriously SAD!
What is the wire of the primary winding ??
Absolument!
what is the thickness of wire use in the primery coil of wilding
Mine have a 16 gauge primary winding.
How much wire does it take to rewire a transformer
Do not cut the core of the MOT if you are gonna wrap less than 30 turns. It's not good idea. First of all you reduce transformer performance by 10 % or more, depends on how you put it back together, also the noise is ridiculous.
Who cares if it's less efficient? Also, the noise can be easily controlled by wrapping the wires in tape tightly so they are extremely snug in the transformer.
***** the wires barely make any noise, it's the core.
I've seen people using two MOT's, but is that really necessary or can I just use one?
Bit late but here goes:
Make it Extreme channel recently posted a spot welding video using two transformers in tandem. They show the power of one then both. I made a spot welder with a single transformer using welding wire at 2 turns as secondary. It dossnt have enough current, takes long time to hold and doesn't weld well.
I am doing this regardless of experience. I need one for my batteries.
sir what is gage of primary wire?
can you please tell the value of primary coil current in idle mode?
RIP headphone users when re grinder starts
How many volts on secondary winding are needed?
Is going to be in the 2 to 3 volt range.
how the size of the replacement cable
Don'y TRY this at home, but DO IT. Because if you try you're asking for trouble. ;)
Gabriel Kozsar yes because if you touched one of those it would knock the piss out of you or even kill you DO NOT TRY THIS AT HOME!!
bro pls don't yap about what you don't have real knowledge or experience with.
Those aren't "spacers" they are flux shunts that limit the max current in the primary.
btw, apocy works to put it back together.
yeah 2 part epoxy or Jb weld is great
yup
That's the easy part
what if you use aluminum for the second coil?
Aluminium is not as good of a conductor as to copper......so you'll probably get lower voltage passing through the sec. coils
+Yevette Xoxo thanks! I've been wondering quite a while
No, the voltage will not change, but current will be lower as resistance will be higher.
talkative
i hear ya bro lol
Any crafters out there in the uk i can send materials to? MOT can kill, and the capacitor knocks one back 6 ft. I rather be safe.
Dude..... That was painful to watch..... You are going to get somebody killed.... Use a SURGE PROTECTOR to turn it on and off. Another safety precaution is to salvage the light bulb and put it in the main power supply line so when you turn on the MOT, a light turns on with it.... and is a signal that there is a need for caution.
You should watch a UA-cam video on "How to set the audio levels on your UA-cam videos"
get a block off wood to keep things good
14:20 I dunno. It depends on whos house it is. lol
I made 1
This video showing you the HARDEST way to take apart a transformer for making a Spot Welder.... Hahahahahahahahaha You don't need to take it apart at all.. Hahahahahahahahahaha
Jb weld 2 part epoxy...this guy not to with it...go to grant Thompson he'll show us a good way to do it
I cant find your arc welder video
TOO MANY MISTAKES .....BYE
Ummm... I appreciate people making videos.... but you did not show how to build it! You skipped forward for to testing it....
Don't make this at home
The government needs your money
Anyone w/o knowledge of electricity & what it can do, will be in a world of hurt. 100mA is painful enough. It is actually the current, that will do significant damage or even send someone into cardiac arrest with just one screw-up let alone a few. Going into V-Fib(Ventriclular Fibrillation) is not good by any means. That or just an M.I. (Myocardio Infarction) would be the least of your worrys. If in doubt, don't attempt it. I myself have been jolted with 500 V, but only required muscle relaxers (no, it was not related to transfomer work).
Virtualgod2009 A friend from wok was killed by working on power lines in a crane when he got too close. He was burnt to a crisp.
this may be the most incompetently built diy spot welder on youtube.
Hackaday has a very kool one you can weld battery tabs with
Too much unnecessary detail. Get to the point.
Making a video showing how to build a spot welder then advising everyone not to attempt it so you won't be held responsible for electrocution is as idiotic as showing a video how to make crack cocaine and claiming. "You didn't hear it from me." I will follow your directions to the 'T' and make a spot welder. If I get electrocuted I am holding you responsible. Ha!
Tucker Not Sucker! The government shows videos on how to duck under tables for nuclear protection, and told everyone that eating carrots gave the military better eyesight, and that marijuana kills and causes rape...
I think he can make whatever disclaimer he wants. That is kind-of the purpose of a disclaimer.
Showing someone how to skydive, and pushing them out of a helicopter are not the same thing. He is showing you how to skydive, you jump, it's your responsibility. Blaming others is YOU failing to take responsibility for YOUR actions. Grow-up, you aren't 5 anymore, no-one is responsible for your actions except yourself. (Look-up kids that kill, and tell me who is responsible, the kid or the parent... Even 5-yr olds are responsible for their actions.)
废话真多
this really dangrous
don't this guys keep safe
hahahaha
+the electronic man There is nothing dangerous about it, changing a lightbulb is more dangerous.
+the electronic man I'll be doing this soon. Love home made tools, especially if electricity is involved. But I've been playing and working around power for over 30 years. So Kurtscottage is right if you don't know what your doing, eh don't do it. Best Wishes n Blessings Keith
All the fools like u are showing how to make a spot welder.