Cause: Inadequate Gun Equalization

The welder is not able to close on the workpiece with approximately equal force on each tip.


An equalizing system compensates for welding conditions in which the closing weld tips are offset from the plane of the workpiece (Fig. 1). As one of the tips first touch the workpiece, a force is created that slides or rotates the gun to a position that centers the gun tips about the workpiece (Fig. 2).



Quality, Workplace Issues, Cost, Downtime, Maintenance, Throughput (cycle time; PPH), are all potentially affected by this condition.

Subordinate Causes

  • Wrong cables or shunts
  • Inoperative equalization mechanism
  • Equalization spring too stiff
  • Workpiece outside of the equalization mechanism’s range
  • No equalizer

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