Power Spring Design

Inspect inner and outer attachments, housing contact and the independent stop. A spring that still returns may nevertheless have local damage.

Stored or released rotational work is the integral of torque over angle. The full usable curve, with angle in radians, is required.

Relate travel to the effective winding radius through the actual spool geometry. A fixed circumference estimate may fail when cable builds in layers.

No. Speed depends on stored energy, moving inertia, resistance and damping throughout the return path.

List agreed torque limits at defined turn positions, direction and test speed. A single maximum value does not characterize useful operation.

Provide a direction diagram referenced to a visible housing or shaft datum and use a setting fixture that enforces the approved motion.