I'm looking for plans for a homemade spot welder. I've looked all over the net and found videos, etc. but I can't seem to grasp the whole step with the microwave transformer. Anyone have experience with this? Any ideas/advice/designs would be much appreciated.
I intend to use this for general gun repairs and hopefully making my own accessories and other fun things in the future.
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March 28, 2009, 11:15 PM
I am not familiar with home made ones, but spot welders are usually good only for welding sheet iron or steel; their main use is in the auto industry for body assembly. The idea is that the spot welder has a means of pinching two sheets of metal together while it sends a low voltage, high amperage current through the welding tips. The heat resulting from the resistance between the two pieces of metal does the welding. For any extended use, the tips have to be water cooled.
I think its use in a gun shop would be limited, though we had one and used it from time to time.