Optical Measurement of Spot Resistance Welding Guns

Spot resistance welding processes may be troubled by deviations of electrode positions (contact fault). The article presents this issue in relation to robotic spot welding guns used in high-volume production and manual spot welding guns used in repair works. The article presents the method for optical measurements of the above named welding guns, enabling the determination of an electrode contact fault, as well as compares both types of welding guns in this respect.