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2. Rotary actuator - Wikipedia

   en.wikipedia.org/wiki/Rotary_actuator

   A rotary actuator is an actuator that produces a rotary motion or torque. The simplest actuator is purely mechanical, where linear motion in one direction gives rise to rotation. The most common actuators are electrically powered; others may be powered pneumatically or hydraulically , or use energy stored in springs .

3. Servomotor - Wikipedia

   en.wikipedia.org/wiki/Servomotor

   This is the steering actuator of a large robot vehicle. Industrial servomotors and gearboxes, with standardised flange mountings for interchangeability. A servomotor (or servo motor or simply servo) [1] is a rotary or linear actuator that allows for precise control of angular or linear position, velocity, and acceleration in a mechanical system.

4. Servo (radio control) - Wikipedia

   en.wikipedia.org/wiki/Servo_(radio_control)

   Servos (also RC servos) are small, cheap, mass-produced servomotors or other actuators used for radio control and small-scale robotics. [citation needed] Most servos are rotary actuators although other types are available. Linear actuators are sometimes used, although it is more common to use a rotary actuator with a bellcrank and pushrod.

5. Actuator - Wikipedia

   en.wikipedia.org/wiki/Actuator

   Rotary actuators can have up to a rotation of 360 degrees. This allows it to differ from a linear motor as the linear is bound to a set distance compared to the rotary motor. Rotary motors have the ability to be set at any given degree in a field making the device easier to set up still with durability and a set torque.

6. Roller screw - Wikipedia

   en.wikipedia.org/wiki/Roller_screw

   Planetary roller screws are used as the actuating mechanism in many electromechanical linear actuators. Due to its complexity, the roller screw is a relatively expensive actuator (as much as an order of magnitude more expensive than ball screws), but may be suitable for high-precision, high-speed, heavy-load, long-life, and heavy-use applications.

7. Rotary encoder - Wikipedia

   en.wikipedia.org/wiki/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 analog or digital output signals. [1] There are two main types of rotary encoder: absolute and incremental. The output of an absolute encoder indicates the current shaft position, making it an angle ...