1. Rotary Actuator Servomechanism

2. Definitions A rotary actuator is an actuator that produces a rotary motion or torque. An actuator that directs force in a circular motion. Rotary actuators are sometimes called motors. A rotary actuator is the most compact device available for producing torque from hydraulic or pneumatic pressure. 3. Actuator power sources Stepper motors a form of electric motor that has the ability to move in discrete steps of a fixed size. Servomotors a packaged combination of several components motor | gear train | position encoder Fluid power actuators drived as an actuator, internally constructed both hydraulic and pneumatic power. Vacuum actuators vacuum powered rotary actuators, without pneumatic power. 4. Rotary Actuator Operation 5. Applications General Industry camming indexing clamping braking tensioning positioning tilting safety closure systems Marine opening and closing hatches swinging cargo handing gear opening and closing fire and collision bulkhead doors valve operation positioning hydrofoils steering control Robotics rotation and positioning Materials Handling switching conveyors turning and positioning container clamps on lift trucks tensioning and guiding operating valves braking lifting Metals Processing upending coils turnstiles walking beams immersion/agitation mechanisms 6. Servomechanism as a Rotary Actuator Small R/C servo mechanism 1. electric motor 2. position feedback potentiometer 3. reduction gear 4. actuator arm 7. Rotary encoder A rotary encoder, also called a shaft encoder, is an electro-mechanical device that converts the angular position or motion of a shaft or axle to an analog or digital code.