US 12,226,886 B2
Method for operating a machine tool, and machine tool
Christian Koschel, Augsburg (DE); Jan Friedmann, Denklingen (DE); and Stoyanka Ivanova, Landberg am Lech (DE)
Assigned to Hilti Aktiengesellschaft, Schaan (LI)
Appl. No. 17/774,335
Filed by Hilti Aktiengesellschaft, Schaan (LI)
PCT Filed Nov. 9, 2020, PCT No. PCT/EP2020/081454
§ 371(c)(1), (2) Date May 4, 2022,
PCT Pub. No. WO2021/099157, PCT Pub. Date May 27, 2021.
Claims priority of application No. 19210606 (EP), filed on Nov. 21, 2019.
Prior Publication US 2022/0402110 A1, Dec. 22, 2022
Int. Cl. B25F 5/00 (2006.01); B24B 23/02 (2006.01)
CPC B25F 5/001 (2013.01) [B24B 23/028 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for operating a machine tool having a tool rotatably bringable into operative connection with a driven shaft, wherein the machine tool has a drive for actuating the driven shaft, a controller for actuating the drive and at least one sensor operatively connected to the controller, the method comprising the steps of:
determining a speed of the driven shaft;
determining a speed of the tool using the sensor interacting with the tool; and
controlling an output device or controlling, in a predefined manner, the drive via the controller when a difference between the determined value of the driven shaft and the determined speed value of the tool is greater than a defined limit value.