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63899-002 Rev. A 3/20/2024
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Counterclockwise vs. Clockwise Rotation
Figure 2
F.2-2 REFERENCE DIRECTION
All SQM actuators have a limited range of motion between 0° - 90°. Means of operation
mandates the actuator to re-home before each startup. This requires the actuator to rotate the
“D” shaft to a different position either less than 0° or greater than 90°. Figure 3 below gives a
more detailed view.
1. Reference Open – Based on the direction of operation rotation, rotating to a position greater
than 90° is called referencing the “open” side.
2. Reference Closed - Based on the direction of operation rotation, rotating to a position less
than 0° is called referencing the “closed” side.
Referencing Open vs. Referencing Closed
Figure 3