Actuator Sizing
Actuator sizing turns a machine motion requirement into a physical component choice. In pneumatic systems this usually means calculating the cylinder bore and stroke required to generate sufficient force at available pressure, while also checking speed, guidance, mounting style, and the real load conditions experienced by the mechanism.
- Clamping and pressing motions in assembly fixtures.
- Pick-and-place lifts, pushers, and part escapements.
- Stopper cylinders on conveyors and indexing systems.
- Vacuum pick heads or guided slides with combined load cases.
The usable force from an actuator depends on pressure, effective area, friction, rod-side versus cap-side action, and real-world losses. Engineers also consider buckling risk on long strokes, off-axis loading, shock at end of travel, cushioning, and whether the mechanism needs guided motion instead of a basic cylinder. A correct actuator choice is always tied to the sequence, duty cycle, and mechanical arrangement around it.
- Using theoretical force only and leaving no margin for friction or dynamic load changes.
- Choosing stroke from rough geometry without checking hard-stop positions and sensor placement.
- Ignoring side load, which causes rapid seal wear and poor repeatability.
- Selecting a standard cylinder where a guided slide or compact actuator is actually needed.
- Forgetting retraction force is lower on the rod side for double-acting cylinders.
ClusterVise ties actuator sizing directly to machine requirements instead of leaving it in a separate hand calculation. When force, stroke, or cycle assumptions change, the linked valve, sensor, and pneumatic BOM choices can update with it, making the downstream impact visible immediately.
| Item | Selection | Basis |
|---|---|---|
| Load case | 180 N clamp force target | Includes workpiece variation |
| Available pressure | 6 bar regulated | Machine pneumatic supply |
| Recommended actuator | 40 mm bore compact cylinder | Maintains force margin |
| Stroke | 50 mm | Mechanism travel requirement |
| Feedback | Dual magnetic sensors | Extended and retracted confirmation |
