I’m a little late to the game. Welder here. Stick welding needs about 34 volts to work properly.

"Capaciturrrrrr" Never gets old

You need at least 30-36 volts to do any arc welding. You can stick weld at as low as 60-70 amps, but you need the voltage to get the arc going and maintain it. I think you'd need 2 transformers for it. Maybe re-visit this project later? Your videos are very informative!

I'm a video and this welder kills me

"someone who knows how to weld" is the key here. It took me ages to learn how to lay a proper bead and I was using a very nice welder. Welding is one of the few things that require a developed skill in addition to knowledge.

WARNING: Microwave ovens contain high voltage capacitors. Even when unplugged, these can kill you. DO NOT TAKE APART A MICROWAVE UNLESS YOU KNOW EXACTLY WHAT YOU ARE DOING!

FYI, instead of putting in the effort to shreds up the coil like he did, you can just grind out the weld near the base that holds the transformer together and then easily pull out whatever you want without damaging it.

those aluminum electrodes are for Tig welding, used as filler rod. which is completely different from stick welding

Aluminum is really hard to weld - recommend trying iron or steel for your next attempts

be aware to discharge the high voltage capacitor before you start messing inside the microwave. also the magnetron may contain beryllium oxide which is very dangerous once you break it apart and inhale dust of it. only mess with microwaves if you know what you are doing.

Dear Scott: You mentioned that the output voltage of the 2nd design is about 8 volts. My late husband was an auto mechanic and in his shop the arc welders ran around 24 volts. I am suggesting a 24v design. Hope this helps.

Very rare video of failures. That saves a ton of time for others who want to do the same. And this is a valuable lesson. Thanks for posting.

A store bought welder would be safer and more effective but where is the fun in that?

Fuck me i was waiting for the skateboard to be welded but nope.

3:22 we are going to make a SHUNT (any electroboom viewers?)

One of the best about Great Scott he doesn't make fake videos.

See what Photonicinduction has to offer on transformers.

use both the transformers together

Your honesty is awesome!

I would recommend you put some more turns on the secondary. Aim for around 26 volts AC output. Then use a full bridge rectifier and a filter capacitor of sufficient rating to convert the ac power to a smoothly rectified DC output, which is almost mandatory for aluminum and recommended for steel.

Welding requires at least a minimum of 24 volts. The weld is created by the amperage but also the the potential difference between the the electrodes. It will also help reduce loss if you keep the secondary coil as close to the core as possible.

love ur videos dude..

Dear Greatscott, Thank you very much for giving us Directions for our DIY projects through your experiments .. I thought simply we can make a welder with a microwave transformer as per lot of peoples tutorials. Thank you for Directing.

Super video and sound quality.

Trying to weld Aluminium without welding experience with a homemade welder is VERY ambitious, as others have pointed out (not that that's necessarily a bad thing). I'm not a professional welder, but I have a little bit of experience with WIG/TIG welding and the theory behind it, so I wanted to point out some things I noticed (some of which others have already pointed out, but I'll repeat them for completeness). First off, even experienced Welders often don't enjoy welding Aluminium. This is due to the oxide layer which forms on the surface and has a higher melting point than the unoxidized Aluminium below it. As a result, you'll have a puddle of molten Aluminium, between the surface layers, which will simply run away once the surface melts. This is normally alleviated by preparing the surface with a wire brush or similar, removing the oxide layer (which will form again very quickly, so timing is key there). Another trick is welding with AC (normally, TIG welding is DC with the Workpiece as the Anode, because the part receiving the electrons gets hotter), which will help breaking up the oxide layer with the changing current direction. The third problem you have would be the missing inert atmosphere, which would prevent new oxide from forming during the welding and keep the weld pool stable. On general welding: I have no experience with this personally, because my Inverter has a HF-Starter, but as far as I know, starting an arc without HF is quite skill intensive ("Streichzündung" in german). I think you have to touch the electrode to the workpiece for the current to flow, and then lift it at the right time for the arc to form (but as I said, no experience). Also, for a stable arc, you need to roughly maintain the distance between workpiece and electrode, which can be pretty hard if your electrode melts off (like it does with stick welding) and damn near impossible if it quickly melts away (like your aluminium filler wire). This problem is increased by AC welding, because as mentioned above, the part receiving electrons gets hot. With all this being said, my recommendation would be a design change to steel. If you put a steel sleeve over the axle and fasten it with the screw, it should have no problem taking the load. Then you can weld your motor mount (made out of steel) to this steel sleeve. Keep up making these awesome videos! PS: If you happen to live in southern germany and want to practice welding with a commercial inverter, you can shoot me a pm.

From what I've found online, you'll need around 30 Volts from the secondary winding to form a stable arc. Haven't yet tried it myself, but I plan on doing it sometime soon! :)

You are educational and entertaining!!! Posting your failures is very educational because now I know what NOT to do.

*_I CAN'T BELIEVE I DIDN'T KNOW ABOUT THIS CHANNEL-SUBSCRIBED!!!_*

why do u end the vid so fast me wanna see coin getting rekt

go to grand thompson he has a video on that

I always love your videos!

My favorite channel right here

"...showed a bit more potential..." lel

use 2 of them in series they will surely work

Hi Scott! This was really funny!

amazing work - for aluminum people emit argon (and I think some use nitrogen) gas on the weld area because otherwise aluminum oxidizes very quickly before a clean weld can form.

Aluminium is quite difficult to weld, especially for a beginner. Have you tried welding just regular steel?

King of random lied us all!

“Luckily, I got this microwave a while back...” -Great Scott!

Wow that was Great Scott 😁

If you are doing this make sure you discharge the capacitor!

Let's all donate to buy him a tig welder

Arc welding is a fair bit higher voltage, enough to feel. I was subjected to this as a kid holding up an angle iron piece for my father to weld, however the ground was attached to the frame, not my piece. So as i moved fractionally to disconnect the circuit, I became the circuit. It was very mild compared to 240v AC. I would hazard a guess at 50v

You first attempt with the 70mm^2 wire might have worked as a spot welder. MMA welding uses about 40 Volts. It is also possible that a thin oxide layer on the aluminium may have increased the resistance enough to severely limit the current.

hehehe hungarian text on the sticker :D

Wow !!!! You are good at physic.

Seeing Great Scott. Liked instantly

your videos are top notch

Hey Scott, the maximun power of a transformer is its area^2 and you can get more from the wall plug, you Just need to connect the primary coils of two transformers or maybe 3 in parallel and the outputs in series with that you can get like 24 volts or near and that works pretty well, I have a welder and know to weld but I made one a time ago and works pretty fine byee

What kind of rotary tool did you use?

:-) .... this is a funny one ... i watched other videos from you, great respect for you work.

Thank you for the video.

You tried arc welding with high current whereas high current is for resistance welding. (And high voltage for arc welding)

Rewind the first one and put them in series.

I love welding aluminum, stick aluminum is a lot of fun but i dont do it nearly as often as tig and its been a while. I suggest higher silicon electrodes because it will be easier to weld with, maybe 4043. also, for tig you would need around 180 amps for a good weld there but I don't remember with stick, I think it's around half that. If it is helpful to you, I can mess around with the welder later and find the best amperage. Let me know

Love this! I hope tho he mentioned how many A is produced for the 2nd attempt. Perhaps showing a Computation as well

Is 2019 any upgrade avalible :) ?

The courrent is AC For soldering the better courrent is dc courrent. You can convert ac from dc with a big diode bridge, (Over 100 A) and reapeat that experiment

Awesome Video Thanks Best of Luck

Classic video, love it!!

@GreatScott, are you from germany?🇩🇪

pretty sure you saw grant thompson's video before making this it seems you improved on it though

I find it fun and interesting, that when I watched this in high school I had no idea what was being explained, and 6 years later approaching grad school and I can look back on this like "woah I know all of this now" lol

Well done

this guys english voice is so cool sounding.

HACKED!: Microwave Transformer becomes a High Current Transformer

From using truck batteries for welding, I have found that 36 volts does fine, any voltages under 36 makes it hard to maintain any weldable arc

Wish I could write that neatly being left handed! That's good handwriting

FYI this is a failed attempt. so decide if you still wanna watch

5:42 Love this part coin hitting up,toss a coin to your Witcher

I love that you don't just cherry pick the projects that work out to post.

good work .. good man

Welding aluminium is not that easy. It´s better to weld steel or etc..

I cry, if I see how you kill coils.

Damn I don’t know a lot about this but the things he do is super dangerous, but he really knows what hes doing.

Lel this guy is such a brave, salvaging the toxic magnetron is dangerous but this guy did a do, that's amazing

Would have been nice to include " Failed project" into the title.

How is it hacked if you didn't get the result you wanted? I really hoped for a result that worked.

great video!

If you spray lemon juice on the aluminum prior to trying to weld or solder it, it keeps it from oxidizing.

Please show how to discharge the capacitors (So everyone will be safe.) Thanks for posting! Not all experiential things to right...but it's still interesting and someone will improve. I once tried to take a propane weed burner, and drill out the orifice and added air feeder holes on the sides to get a larger flame. I thought To do this on a cold day, when I had a driveway full of ice and snow, And no working snow plow: I thought that I could get rid of the ice quickly and maybe the snow plow I wouldn't need that anymore in Winter with this easier method. Well, you can imagine my surprise when I turned it on. Sacred Hell out of me, as I almost incinerated two Toyotas! And when the flame melted the snow and ice, immediately it just became ice again, as I think the ground just acts like a massive heat sink... a complete failure. All the Best! 73 DE Bill W8LV

I love your videos. Check out The King Of Random 's videos on his arc welder.

Welding aluminum is hard af due to the low melting temp. Also you're a mad man and please tell me you had a welding mask.

Great video

try to connect two transformers (each with 8 turns on the secondary) in series. And input 240 volts into the primaries.

combine the 2 transformers together then they will work trust me connect them in series

the voltage for welding is usually in the 20 or higher volts. you might need 2 microwave transformers with the output in series.the higher the voltage the better and easier it is to get a arc .

Scot: shows a clip in which he welds a metal sheet Also scot : will i be able to veld

Nice tinkering and everything, but you do realise you cant stick weld aluminium dont you?

Three car batteries in series will work as a great welder

In New Zealand most arc welders come in at about 48volts, just under the 50v max for ELV (extra low voltage) as a safety requirement.

thanks very instructive vidéo !

Do you even understand how welding works? 😂 trying to stick weld aluminum lmao

Türkçe altyazı ekleyen Adam gibi Adama selamlar.

To draw the arc you need around 50V and then enough current available to properly heat the work. Aluminum requires helium as an inert gas envelope to prevent oxidation. (Heliarc)

i love it when u say" stay creator"

the "Grant Thompson King of random" alredy show how to make a stick welder, a spot welder and this one i done on the first try! só i recomend you to go to his Channel and see how he do it!

Ismt tis incredibly dangerous?

It was great you tried it.

To get the coil out i used motor oil. It fell right off. It was amazing.