what are actuator encoders used for
LECTURE 3: Actuators, Encoders, Relays and Switches. Actuators: An actuator is the device that brings about the mechanical movements required for any physical process in the factory. Internally, actuators can be broken down into two separate modules: the signal amplifier and the transducer. The amplifier converts the low power control signal into a high power signal that is fed into the transducer, which actually converts the amplified control signal into the required form of energy. Figure 3.1.
Encoders . Encoders are sensors used to detect position. They can be linear, or rotational. The problem with linear encoders is that they have to travel the entire length of their range. Linear encoders, therefore, are long and expensive. Rotational encoders, on the other hand, are small and relatively cheap and less unwieldy.