A servo-drive system for feedback-based control of motion and positioning of a motor comprises a current measurement device that obtains a measure of current being drawn by the drive motor from which to provide feedback. The current has an operating range which is made up of a relatively large current range for acceleration but remains within a relatively smaller current range for steady state operating of the motor. The current measurement device has a first, coarse, sensor optimized for measuring the relatively large current range and a second, fine, sensor optimized for measuring the relatively smaller current range, thereby to maximize feedback accuracy during steady state operation.