Quality control module for tandem arc welding

A tandem welding system comprising:

• a plurality of spaced apart electrodes arranged to travel at a common travel speed, the plurality of spaced apart electrodes cooperatively performing a weld;
• a data storage medium storing measured data for each electrode during the performing of the weld;
• and
• a processor performing a process comprising:
• for each electrode, recalling measured data corresponding to the electrode passing a reference position;
• and
• combining the recalled measured data of the plurality of spaced apart electrodes to compute a weld parameter of the tandem welding system at the reference position.

A tandem welding method comprising:

• performing a tandem welding process using a plurality of electrodes arranged at fixed relative positions to one another and cooperatively forming a weld;
• measuring a welding parameter of each of the plurality of electrodes during the welding process;
• determining welding parameter values for each electrode that correspond to the electrode welding at a selected position;
• and
• computing a tandem welding parameter of the tandem welding process at the selected position based on the determined welding parameter values of the plurality of electrodes.