Does it matter whether the two spot welding machine has a copper piece?
As long as the ground wire is each, it does not affect
The power supply of the two machines is consistent.
Certainly is the distance between two sets of resistance welding machine, sure they are much greater than the resistance between the single welding electrode, the resistance welding is low voltage and high current, the resistance is very large influence on it, and certainly there will be a small amount of diversion, but can be ignored.