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On/Off Magnet Ground Clamp For Arc Welder
The Ingredients...
The Process...
I was originally going to have this just be a part of the arc welder, but figured I would give it it's own project due to the scarcity of information available online. I've seen some on/off magnet ground clamps for arc welders that sounded incredibly convenient. I've already collected a bunch of magnets from HDD and microwave magnetron teardowns. So of course I set out to make my own. I looked all over the internet and found some videos of guys making on/off magnets, but I still was unable to build my own. I ended up needing to buy my own on/off magnet from Harbor Freight for $24 after 20% coupon - and then tearing it apart. An interesting bit I found was that it needed two metal plates on each side to work correctly. With only one, it was magnetic even when switched off. The internals are very simple. There are two rectangular thin metal separators with half-cylinder magnets on either side (so a total of 4 magnets and 2 metal separators), held in place by a plastic bracket which also contained the switch. And then there is a thin metal cylinder that acts as a spacer for the one lone rivet of the triangle. It operates by flipping the switch which rotates both magnetic cylinders 90* in the same direction. **NOTE - Originally, I thought the magnets were metal cylinders and the separators were the magnets. But upon taking them out, it seems the other way around. I know very little about magnetism. So I will be trying to learn this as I go.