The operators on a spot welding line complained of getting shocks. Since the tooling and parts were all steel, and conductive, it was not taken seriously, but we did some tests to be sure. We found a voltage on the secondary of the spot welding guns - the copper shanks that contact the part and conduct the welding current. The fix was to add a ground wire to one side of the secondary of the weld gun transformer.
Fifty-six-year-old Pasquale Russo has been doing metalwork for more than 30 years in a tiny southern Italy village. Many craftsmen like him brought with them fabrication skills when they came from the Old World to America.
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