Small 110 Volt Arc Welder (NYDG)





Introduction: Small 110 Volt Arc Welder (NYDG)

Im going to write a ton of Instructables on how to make Not your Dads Garage but work area designed for the future of builders. I will work in an evolution process to more and more complicated project, using project in past Instructables to help current project, assuming you have access to your dads tools (Hammer, Screwdriver, Saw, Drill,)
We will start by making a 110 Volt Arc Welder, 220 would be nice but most Instructable starters dont have a 220 outlet. It needs a little solder so you will need a soldering iron.

Step 1: Building the 110 Volt Arc Welder Housing

Make sure its strong, it will way more that 100lbs
1. 2 x (30 inch x 24 inch x 1 inch) SIDE
2. 1 x (25 inch x 36 inch x 1 inch ) FLOOR
3. 2 x (24 inch x 36 inch x 1/2 inch) Levels
4. 4 x (36 inch x 4 inch x 1/2 inch) Walls
5. 1 x (37+ inch x 2 inch Dowel) HANDLE

Step 2: Electronical Parts

I have had the best luck getting microwaves from Secondhand stores, for free or less than 5$ each. But you could check the junk yard, and other places, just dont break yours for the parts (popcorn is better than a welder).

Electronic Parts
1. 10 x Microwaves @ 900+ Watts
2. C1: 600pf 2kv ceramic
3. C2: 0.1mf 400v epoxy
4. R1: 1M Linear potentiometer
5 .R2: 5k Linear potentiometer
6. C3: 22mf 250v electrolytic
7. Q1: IRKT71 SCR module
8. Q2: Lamp dimmer triac
9. BR1: RB152 1A bridge rectifier
10. D1: Trigger diac

1. Wire Cutters
2. Wire Strippers
3. Soldering iron
4. Drill
5. Basic screwdriver set
6. Elbow Grease

Step 3: Moding the Transformer

Microwave oven transformers are step up transformers. That means that the voltage at the secondary winding is higher than the primary 120 volts. The secondary voltage is typically 4000 volts. Replace low voltage winding with #6 Single conductor wire, about 10-18 wraps. The load will change to 10 volt, and during welding will be about 2-4 volts at 250 amps.

Step 4: Electronical Parts

Assembling the Electronic Part onto the Caring Case.

Just follow the Schematics and make sure you get all the (step transformers) in the correct placement.

Easy to follow Schematic... Thanks too...., with minor changes.

Step 5: Finished Product

Special thanks to my electronics college teacher for giving me the idea and the special thanks to the web for donated material, pictures and information. Remember safety.



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I think that is way cool a little box like that for chicago welding . With it only being 110 volt how much can it really do.

the microwve transformer emits Gama rais not electricity. dosent it ?

no the rads come from the emitter and it is not gama it is microwave waves
simple chart i use

gamma rays? that would mutate the food. now i'm off to "shoot gamma rays at food."

Firstly, what are "Gama Rais"? Secondly, the microwave transformer does not give off anything but electricity and a little bit of heat. Thirdly, if you mean microwaves, the magnetron is what makes them and drools them into the cooking chamber.

the magnetron makes microwaves not gamma rays

He means Gamma Rays and no it doesn't. It provides power to the magnetron which creates MICRO waves which heat water thus cooking food.

The transformer puts out plain old electricity, it's the 'magnetron' that puts out the microwaves that cook the food.

I don't mean to be critical, but the project can be built a lot simpler. If you take a MOT (microwave oven transformer) and test the turns ration you'll find it's about 1:18. Turn it around and it's 18:1. So if you start with 120V you'll be stepping it down to 6V (measure it with a volt-meter, carefully!) Yes it will be AC but arc welders typically have a DC and AC mode. You can add a bridge rectifier for DC if you want to. Two reversed MOTS with parallel primaries and series secondaries will give you 12V output. Yes you can add more MOT's for more current output. Using a dimmer switch will reduce your power output because dimmers only use the trailing half of the wave, and dimmers don't really like inductive loads. They create "noisey" spikes that tend to heat -stress transformers, but only on half as long.