Rotary position sensors include potentiometers, resolvers and a variety of magnetic and capacitive technologies.

Motor controllers receive supply voltages and provide signals to motor drives that are interfaced to motors.

Servo drives provide electrical drive outputs to servo motors in closed-loop motion control systems where position feedback and corrective signals optimize position and speed accuracy

Linear encoders sense and digitize linear position change for positional measurement and feedback to control systems

Incremental rotary encoders are multi-turn sensors that use optical, mechanical, or magnetic index-counting for angular measurement.

DC servomotors are generally small and powerful for their size, and easy to control.

AC servomotors are responsive, high-acceleration motors typically constructed as permanent magnet synchronous motors.