years ago when working on a construction project and the welder were a good distance away, we used to clamp a strip of inconel or monel to the building frame and position our ground clamps at varying distances from where the strip was connected to the building to vary our amperage at the stinger.
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Irnsrgn
Knowledge must be shared or it lies dead in the mind.
The Blacksmith must use Hammer and Flame to force the iron down the path of his own choosing.
I usually find it much easier to be wrong once in while than to try to be perfect.
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