Abstract: A method for releasing a drill core from a drill bit of a core drilling device, with an intuitive movement being recognized and used as a trigger for a shaking process for the drill core. The intuitive movement may be for example a shaking movement of the core drilling device. A core drilling device for carrying out the proposed method is also provided. The core drilling device preferably includes a sensor system for detecting the intuitive movement of the core drilling device, while the sensor system may for example comprise a gyro sensor.

Abstract: A method for braking a rotating tool of an electric machine tool, wherein the electric machine tool includes a machine electronics system and a motor. A braking method in which the braking process includes sub-sequences for feeding back the released braking energy and for driving the electric motor. The braking method is characterized by a changeover between the sub-sequences, wherein the changeover takes place after predefined time periods for the individual sub-sequences have elapsed. An electric machine tool for carrying out the braking method is also provided. The electric machine tool may be, in particular, an electric grinder.

Abstract: A method for braking a rotating tool of an electric machine tool, wherein the electric machine tool includes a machine electronics system and a motor. A braking method in which the braking process includes sub-sequences for feeding back the released braking energy and for driving the electric motor. The braking method is characterized by a changeover between the sub-sequences, wherein the changeover can either be initiated as a function of a voltage in an intermediate circuit of the machine electronics system. An invention relates to an electric machine tool for carrying out the braking method is also provided. The electric machine tool may be, in particular, an electric grinder.