In welding position, improper electrode alignment exists when either of the two conditions is true:
- The contact surfaces of the upper and lower electrodes are not parallel;
- The centers of the contact of the upper and lower electrodes are not coincident.
There are two typical classes of electrode misalignment, axial misalignment and angular misalignment, as shown in the figure. In the figure, Case 1 represents good alignment, Case 2 represents another possibility of good alignment. Case 3 is a typical axial misalignment. Case 4 is a typical angular misalignment (with angularity).
Quality, Workplace Issues, Cost, Downtime, Maintenance, Throughput (cycle time; PPH), are all potentially affected by this condition. Special considerations are noted below:
Maintenance: Due to the excessive wear of the electrodes, more maintenance is required to dress or replace the electrodes.