Abstract: A measurement tool includes a rotor to rotate about a longitudinal axis, an axial gap generator having a stator assembly adjacent to the rotor, and a movable support structure to which the stator assembly is mounted. The axial gap generator generates a voltage signal as a function of a gap spacing between the stator assembly and the rotor, where the gap spacing is parallel to the longitudinal axis. The movable support structure moves the stator assembly parallel to the longitudinal axis based at least in part on a physical property of an environment about the movable support structure.

Abstract: An electronic storage system includes a first cylindrical storage area. The first cylindrical storage area is configured to rotate about an axis. The first cylindrical storage area includes a first storage surface. The storage system further includes a first access head, configured to access information stored on the first storage surface, and a first head arm. The first access head is disposed on the first head arm. A corresponding method, cylindrical storage area, and head access assembly are also provided.