Abstract: A stand, for example, for mounting a medical instrument, has a first part and second part which is connected to the first part in a rotationally movable manner via a rotary joint and can be moved relative to the first part about an axis of rotation. The stand includes a drive module supported on the first part. The module has a drive member coupled to the second part. A control device having a controller is connected to the drive module and intended for setting a drive torque provided by the drive member. The control device includes a torque sensor for detecting a torque acting on the second part and a control-signal assembly connected to the controller. The control-signal assembly from the torque detected and a setpoint value generates a signal, which is fed to the controller and is intended for setting the drive torque provided by the drive member.

Abstract: The invention relates to a medical apparatus having a medical optical appliance and a holding device with at least two holding arms which are connected movably to one another with at least one degree of freedom of movement via a joint and with an actuator which is connected to the two holding arms in such a way that a force can be exerted via the actuator between the two holding arms in the direction of the degree of freedom of movement. A control unit comprises a first regulator for outputting a first control signal to the actuator via an adjusting element. The medical optical appliance is mounted on the holding device.

Abstract: A stand, for example, for mounting a medical instrument, has a first part and second part which is connected to the first part in a rotationally movable manner via a rotary joint and can be moved relative to the first part about an axis of rotation. The stand includes a drive module supported on the first part. The module having a drive member coupled to the second part. A control device having a controller is connected to the drive module and intended for setting a drive torque provided by the drive member. The control device includes a torque sensor for detecting a torque acting on the second part and a control-signal assembly connected to the controller. The control-signal assembly from the torque detected and a setpoint value generates a signal, which is fed to the controller and is intended for setting the drive moment provided by the drive member.

Abstract: The invention relates to a medical apparatus having a medical optical appliance and a holding device with at least two holding arms which are connected movably to one another with at least one degree of freedom of movement via a joint and with an actuator which is connected to the two holding arms in such a way that a force can be exerted via the actuator between the two holding arms in the direction of the degree of freedom of movement. A control unit comprises a first regulator for outputting a first control signal to the actuator via an adjusting element. The medical optical appliance is mounted on the holding device.