Method for detecting at least one tool state of a tool of a machine tool for machining workpieces and machine tool

A method for detecting at least one tool state of a tool of a machine tool for machining workpieces, which includes at least one tool holder, at least one tool holder drivable with an electric or rotary drive, at least one electrical, positioning drive, by which a distance, an angle, or the distance and the angle is adjustable at least between a workpiece and the at least one tool holder, which includes at least one tool which is arrangeable or arranged rotationally fixed in the tool holder and which includes at least one control unit comprising a storage means, comprising the steps of:

• detecting or providing at least one of tool data or workpiece data in the storage means or the control unit;
• providing at least one reference drive frequency of at least one of the rotary drive or the positioning drive, which can be assigned a reference tool state of the tool at least as a function of the tool data or the workpiece data;
• detecting at least one actual driving frequency of at least one of the rotary drive or the positioning drive;
• assigning the actual drive frequency of the at least one of the rotary drive or the positioning drive to a reference drive frequency of the at least one rotary drive or the positioning drive by the control unit and assigning the reference tool state of the tool by evaluating or interpreting at least the reference drive frequency assigned to the actual drive frequency by the control unit;
• generating a display signal by which the reference tool state is displayable or generating a message signal when the reference drive frequency associated with the actual drive frequency reaches or exceeds a reporting criterion.