Friday, January 09, 2009
Capacitive Discharge Spot Welder
It has been a very busy year end for me...
My magnetic loop antenna project is still on hold as the cnc machine is now disassembled.
I cant run the machine at the new place... boring!
At the moment, I am in the process of making a Capacitive Discharge Spot Welder or Hobby Spot Welder for a friend. It uses a large capacitor bank and a high current triac to dump the energy through a solid copper probe. My current setup have about 190 Joules of energy at 25VDC.
The charging is done via LT1083-adj regulator with current limit and switched using a Solid -state relay. Previously, the mechanical relay I used gone "kaput" as the contact is welded together due to large current surge and sparks.