Receiverd from PhotoGuy:
I think this would make a really good thread in the Projects Forum. Please post it there. You will get much more and better advice than I can supply alone.
John
Unfortunately, PhotoGuy has PM turned off, so I could not reply directly. Here is my response:PhotoGuy said:Hey,
I began making a MOT spot welder to rebuild battery packs for my cameras. I have spent too much time and money to drop it and build a CD welder now so I want to keep pushing until I get this thing going...
I built a timer with a 555chip but am having some interference feeding back from the large relay that is tripping my primary coil on my MOT. Can you refer me to a schematic of the circuit you used for your MOT spot welder? I'm powering the 555 timer with a small wall wart transformer and the timer work perfectly when the MOT isn't plugged in. When I plug in the MOT, the 555 timer begins getting erroneous signals and trips itself even without my hitting the trigger switch.
Any help on a circuit would be much appreciated.
Grace,
Guy Lyons
Also, any recommendations on the amount of pressure needed on the electrodes? I'm getting about 3.5V and am using .005 nickel strips. I'm having a problem with arcing that blows my metal away on the ends of my batteries and it is too expensive to experiment with them.
I think this would make a really good thread in the Projects Forum. Please post it there. You will get much more and better advice than I can supply alone.
John