1. What happens in steering using electric telemotor.

A bridge lever moves the rheostat B and an unbalance current will drive the control torque motor. This in turn turns the screw block in the sealed oil bath, and thru the floating lever, causes movement of the actuator control rod.

Once the rudder moves, the control block via floating lever is moved again which turns the motor again, this causes the hunt rheostat to adjust such that there s no  imbalance current and the motor stops.