I am going to be working with small diameter rod and square steel. I see shopping carts that have incredibly even and strong joints on them.
How do they weld them together?
Do they put the wires on there, squeeze them together, then hit them with a jolt of electricity?
Is there an iron powder or flux in there like CadWeld?
Do they power them up, and the welding take place when contact is made?
Is there machinery available for the hobbyist to do this on a small basis, or do I need to use a TIG with a fine tip?
STeve