Abstract: A seismic shaker is described, the seismic shaker comprising:—a base plate;—an electromagnetic motor comprising a mover and a stator, the stator being mounted to the base plate, and—a guiding mechanism comprising a plurality of rods connecting the stator to the mover, the guiding mechanism being configured to enable a displacement of the mover relative to the stator in a first direction and restrict a displacement in a plane substantially perpendicular to the first direction.

Abstract: A seven-degrees of freedom modular robotic device is provided for controlling an instrument, e.g. a bone-drilling or milling device with a precision of about 50 ?m and maximum force of 50 N. The robotic device is a serial kinematic chain of six rotational degrees of freedom and one translational degree of freedom.

Abstract: Robot 1 for bone removal from the skull 2 of a patient which robot 1 comprises a base 3 connected to a robotic arm 4 comprising a series of joints 5 to 11, where the first joint 5 of the series is connected to the base 3 and the last joint 11 of the series is connected to a surgical instrument 12, so that the series of joints 5 to 11 provide degrees of freedom on different axes to the surgical instrument 12, which robot 1 is provided with a headrest 13 for the skull 2, where the headrest 13 is directly fixated to or is integrated in the base 3 of the robot, next to the first joint 5 of the series 5 to 11.

Abstract: A seven-degrees of freedom modular robotic device is provided for controlling an instrument, e.g. a bone-drilling or milling device with a precision of about 50 ?m and maximum force of 50 N. The robotic device is a serial kinematic chain of six rotational degrees of freedom and one translational degree of freedom.