Cause: Incorrect Cylinder

The weld cylinder will not provide the proper range of electrode force or motion.


The weld cylinder serves two primary functions:

  • The cylinder stroke separates the electrodes to allow part access
  • The cylinder closes the electrodes on the workpiece to provide the required welding force
  • The following is a basic list of cylinder characteristics which must be considered for proper equipment function: bore, stroke, single or dual action, type (air, hydraulic, or hybrid), seal type, shaft length, overall length, mounting details, cushions, etc.


Detectable evidence may include:


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

Subordinate Causes

  • Correct cylinder unavailable
  • Improper maintenance
  • Incorrect nameplate
  • Incorrect rework

Note: Similar considerations may be applied to servo motor systems.

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