Some time ago I posted looking for info on resistance soldering. I was going to wind my own xmfrs. Because of time constraints I only got two of the three wound and couldn't get enough amperage. Then, I heard about the Harbor Freight 220 volt, made in America spot welders on sale for $149.95. I bought one of those and experimented. First, a steel welding table was used as one of the electrodes and heavy wire was run to the parts as the other electrode. The parts would not get hot. I think this is because the big steel welding table was heating up instead of the brass parts because the steel has a higher resistance. Next, I ran heavy wire from the spot welder electrodes to the brass parts. This worked. By turning the welder on and off the heat was controllable and solder flowed. Further, the brass did not become discolored like it would have if a torch was used. The parts soldered were only test pieces. Next week the real parts get soldered. Eric
- posted
19 years ago