Hilti Aktiengesellschaft

Wittenstein Se

Jan Friedmann

Christian Koschel

Eduard Nill

Stoyanka Ivanova

Felix Grödl

A method for operating a hand-held machine tool including a tool that can be brought into operative connection with a driven shaft, the machine tool having a drive device for actuating the driven shaft, a control device for actuating the drive device and at least one sensor device operatively connected to the control device. The method includes: determining a value of a feed rate of the machine tool using the at least one sensor device; determining a speed value of the driven shaft; determining an output value by means of the control device on the basis of the speed value of the driven shaft and the value of the feed rate; and controlling an output device in a predefined manner and/or controlling the drive device in a predefined manner by means of the control device on the basis of the determined output value. A machine tool is also described.

Method for operating a hand-held machine tool, and hand-held machine tool

A method for operating a machine tool, in particular an angle grinder, including a tool rotatably bringable into operative connection with a driven shaft, the machine tool having a drive device for actuating the driven shaft, a control device for actuating the drive device and at least one sensor device operatively connected to the control device. The method has the following steps: determining a speed value of the driven shaft; determining a speed value of the tool using the sensor device, which interacts with the tool, controlling an output device and/or controlling, in a predefined manner, the drive device via the control device when a difference between the determined speed value of the driven shaft and the determined speed value of the tool is greater than a defined limit value. A machine tool for carrying out a method of this kind is also described.

Method for operating a machine tool, and machine tool

Mechanotronic implant for use in the human body, with a first element, a second element, a drive unit, which is connected in fixed manner to the first element, wherein the drive unit contains an output unit which is connected to the second element in order to move the second element relative to the first element, an implantable energy receiver connected to the drive unit for wireless powering of the drive unit with energy, and a switch in order to switch the drive unit from a first operating direction to a second operating direction.

Mechanotronic implant

Method for wirelessly transmitting energy from a primary device () to an implantable secondary device (), wherein the primary device includes a primary coil () and the secondary device () includes a secondary coil () for electromagnetic interaction with the primary coil (), with a control process which includes: measuring a primary current flowing through the primary coil () and a primary voltage applied to the primary coil, calculating a secondary current of the secondary coil () and a secondary voltage of the secondary coil () on the basis of the measured primary current and the measured primary voltage, comparing the calculated secondary current with a desired secondary current and/or the calculated secondary voltage with a desired secondary voltage, predefining a desired primary current and a desired primary voltage on the basis of the comparison, and operating the primary coil with the desired primary voltage and the desired primary current in order to transmit energy to the secondary coil ().

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Denklingen, Germany

Jan Friedmann