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Include dwell conditions when the application spends long periods at one position. Compare restart and subsequent output with the initial condition.

Use the design’s approved retaining fixture and release sequence. Removing the load attachment without restraint can permit rapid recoil.

Check wear, debris, contact pressure and dimensional change under the actual motion and environment, rather than assuming a soft guide is harmless.

Stick-slip and breakaway resistance become more visible when the mechanism pauses frequently. Measure restart behavior separately from continuous force.

Only after verifying pair output and alignment. A new spring and an aged spring may differ enough to change the mechanism’s balance.

Include spring envelope, shaft position, flange spacing and housing location relative to a common datum.