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3 Attachment(s)
170 Amp MOT Stick Welder
Home made Microwave Oven Transformer (MOT) stick welder. I based my design on the welder by Daniel B. Hartman (Dan's Workshop). This welder is made from four transformers from old microwave ovens. The transformer secondary coils were rewound, to achieve welding voltage, with 6 AWG solid copper wire. I included two fans from one of the microwaves for cooling. The power adjustable so it can be used with various sized of welding rod. The SCR module used to adjust the power is mounded to a homemade heat sink made from two old aluminum frying pans.
Input: 240V, ~25 Amp
Open circuit voltage: 47 Volts
Welding current: 170 Amps
Rewound transformer secondary coils with 6 AWG stranded copper wire.
Variable power provided via SCR module
Welder installed on the shelf of a cart that I use for welding.
Attachment 3805
Welder removed from the cart with the top cover removed.
Attachment 3806
The SCR for the power control mounted to a homemade heat sink made from two aluminum frying pans.
Attachment 3804
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wow great job, congratulations.
:hattip:
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Thanks scorch! I've added your Stick Welder to our Electrical category, as well as to your builder page: scorch's Homemade Tools. Your receipt:
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<a href="http://www.homemadetools.net/stick-welder-4">Stick Welder</a>
<span> by <a href="/builder/scorch">scorch</a></span>
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<div class="tags">tags: <a href="http://www.homemadetools.net/tag/stick-welder">stick welder</a>, <a href="http://www.homemadetools.net/tag/electrical">electrical</a></div>
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This thread has been moved to the Must Read subforum. Congrats (and thanks) to scorch for making such a valuable contribution!
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Great job on the stick welder . Anyone happen to have plans for a small T.I.G. welder for small and hobby welding ?
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Nice configuration! I've been wondering if more transformers would result in a better device. Seems like you nailed it.
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I would like to plans as well for a small hobby welding if someone has one. Thanks in advance.
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tig welder
has anyone come with plans for a DIY 170 amp tig welder. I’m looking to make such a beast. Thanks😉
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Awesome work. The wooden box on a welder is no bueno. 1/8" aluminum is nice to work with if your experience and tooling is working with wood. You can even cut it with a circular saw. And the aluminum will help dissipate a lot of heat.