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Actuator Arm Definition

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The Actuator Arm is also known as a head arm or access arm, the access arm is similar to an arm on a record player and is found inside all computer hard disk drives. The access arm allows the hard drive to move the read/write heads to the locations where information needs to be read or written to.

Examples and Applications of Actuators

Some examples of actuators of these various agents include:

  • Human - Arms, hands, fingers, legs
  • Part picking robot - Grasping mechanism, moving parts. Examples include solenoids and voice coil actuators.
  • Mail transfer agent - Update software
  • In engineering, actuators are a subdivision of transducers. They are devices which transform an input signal (mainly an electrical signal) into motion. Electrical motors, pneumatic actuators, hydraulic pistons, relays, comb drive, piezoelectric actuators, thermal bimorphs, Digital Micromirror Devices and electroactive polymers are some examples of such actuators.
  • Motors are mostly used when circular motions are needed, but can also be used for linear applications by transforming circular to linear motion with a bolt and screw transducer. On the other hand, some actuators are intrinsically linear, such as piezoelectric actuators.
  • In virtual instrumentation actuators and sensors are the hardware complements of virtual instruments. Computer programs of virtual instruments use actuators to act upon real world objects.

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