Here are all the possible meanings and translations of the word truncated. Princeton's WordNet(0.00 / 0 votes)Rate this definition: abbreviated, shortened, truncated(adj) cut short in duration. the abbreviated speech; her shortened life was clearly the result of smoking; an unsatisfactory truncated conversation.
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.
Actuator is a generic term used for any device that coverts any other energy to Mechanical movement. So in that sense it could include all Motors (rotating) all linear devices like linear motor, solenoids, servo drives anything. There are hydraulic actuators which can give very high force at very low speeds.