Patent ID: 7853413

Claim:
A method for determining at least one characteristic value of an axis, comprising: providing a suspended driven axis of a machine, the axis being driven by a rotating drive unit or by a linear drive unit; providing a measurement and evaluation unit comprising a first device and a second device; connecting the measurement and evaluation unit to a torque sensor or to a force sensor; measuring a torque acting on the rotating or linear drive unit, or a force corresponding to said torque, along a predetermined movement path of the axis, wherein the torque or the force is measured in a forward direction and in a reverse direction, the torque or force being measured by the first device of the measurement and evaluation unit; and determining energy-conserving moments or energy-conserving forces or friction-dependent moments or friction-dependent forces by the second device of the measurement and evaluation unit based upon a computational overlaying of associated torque or force values as a direction-independent characteristic value.