I brought home a 5 kVa "Peer" spot welder. This is a stationary standup kind of spot welder, weighs about 250 lbs, and has a pedal. When I depress the pedal, the top electrode moves down, pushes the parts together, and then current is released as the pedal is depressed further.
I tried it last night, it seems to work, but I do not know just how long to depress the pedal. Would you say that when parts become bright red near the spot, it is enough current for the "weld nugget" to form, or is there some better approach than that?i