MOT arc welder

Attempt at a microwave oven transformer arc welder. Voltage and current are fixed at 35V and 80A. Primaries draw so much that it is needed to plug them in separately behind separate 15A breakers. Weld is not the best due to not knowing proper stick welding techniques and the fact that this was made from garbage. The only things bought were the heavy duty toggle switches, electrode holder, and ply. Windings ratio for both transformers were decreased to about .3.

Category:

Science & Technology

Tags:

• arc
• welder

[zeneslev]

Thanks for the tips. Will get around to making it better soon.

[MrAutocristales]

hola vi el video y me gustarai saber si me pudiera ayudar a hacer un como el de su video ya que no se nada de electricidad le agradeceria mucho su ayuda le dejo mi correo si gusta usted ayudarme se lo agradeceria mucho

[RODALCO2007]

It worked, great to see indicator light on your ON / OFF switches.

Surprising that the 6 mil gauge output wire didn't burn up or the insulation started smoking.

[stalker7d7]

so, did you weld enough to burn your uncovered skin?

[BCQD4]

@cenzo188 you seem like you know your stuff but what wire gauge should i use for the primary if im to have 220

turns and does it matter if after time of overlapping the wire the diameter of the turns could affect the electromagnetism? Any help would be much appreciated

Thank you

[dzdice]

@cenzo188 Hum, so i can acttually tare appart all both primary and secondary and rewind it for the voltage i'm working with and... here you go..! Ex: 48v 25 amps, i use 220 (220v volts europe) turns vs 48turns on the other side? Oh.. my MOT is rated for 1200w this means 1v = 1200amps... ouch! The funny thing is that you can touch the thing because your body doesn't let the current pass since the voltage is extremely low... yikes..! :) (i like it!)

[cenzo188]

@dzdice Most MOT's have the number of primary turns equal to the line voltage. If you have 120 volt mains, you have about 120 turns on the primary. So you'd need only a single turn to obtain 1 volt. At that low voltage, the current would be remarkably high. Assuming you limit the current draw from the mains to 15 amps, 120*15=1800 watts. 1800 watts at one volt gives you 1800 amps. You would need very thick wire. My math could be off on this.

[dzdice]

Nicely done man..! :D I got one MOT now... but i've got a few questions... how many turns vs wire gauge you need to get 1 volt?

[KRAYSLiCK999]

hey does ur secondaries get hot quickly?? i made my own today but i need the thinner rods :) i will be using it for quick tack welds 

[drainocleanser]

@elliotmotoX

go suck a wooly mammoths dick with smuckers grape jelly