In a holding arrangement (101) for a medical-optical instrument (103), an
electric motor is provided in a rotational joint (111, 119) to compensate
a load torque occurring in this rotational joint. This electric motor is
supplied with current in correspondence to a detected position of the
rotational joint (111, 119). A current control curve required for this
purpose is stored in a memory. This current control curve can be
determined in that the rotational joints are deflected with the electric
motor into predetermined positions and the current demand needed therefor
is detected. The holding arrangement (101) has a unit for actively
damping vibration including a vibration damping control loop. This
vibration damping control loop outputs a superposition motor current to
the electric motor as an actuating quantity in order to move the
rotational joint (111, 119) with the electric motor so that a detected
vibration of the holding arrangement (101) is countered.