A subject support (12) includes a fixed portion (22) and a moveable portion (11) coupled to the fixed portion and configured to move along at least one axis relative to the fixed portion (22), and the coupling includes one or more points of friction (32) that move during movement of the moveable portion (11) and which wear due to at least movement by the moveable portion (11). The moveable portion (11) receives and supports at least one of an object or a subject during an imaging procedure with an imaging device (18). One or more inertial measurement units (IMUs) (50) are affixed to or embedded in the moveable portion (11) that directly measure acceleration of translation of the moveable portion (11) along one or more axes.
