Method for process monitoring of a rotating machining unit , drivable by an electric motor , for machining a component, said electric motor being formed with a motor controller comprising a detection module detecting the current consumption of the electric motor for determining the respective current torque of the electric motor , comprising the following steps: a. Detection of the actual values of the current consumption (I Ist ) of the electric motor corresponding to torque generation by means of the detection module ; b. Comparing the respective detected actual value (I Ist ) with stored target values (I min , I max ) of a target value range (I soll ), the target value range (I sοll ) being determined in a teach mode by means of a multiplicity N of current consumption (I Ist ) of the electric motor was previously detected by the detection module of the motor control during machining with the machining unit on such a component and the mean value (I M ) was determined therefrom, and a component-specific standard deviation σ is determined in order to calculate the lower and upper limit value (I min ) respectively (I max ) of the target value range (I soll ) of the current consumption of the machining unit ; c. Determining whether the actual value (I Ist ) of the current consumption is a permissible value from the target value range (I soll ) and d. Outputting of a signal (S) if the actual value is not a permissible value from the target value range, in order to thereby detect a torque deviation of the rotating machining tool , wherein, in the event of a deviation, a corresponding signal (S) is transmitted to an error counter and, if a predefined number of deviations detected by the error counter is exceeded, a switch-off unit interrupts machining with the machining tool or switches off the electric motor . a. Detection of the actual values of the current consumption (I Ist ) of the electric motor corresponding to torque generation by means of the detection module ; b. Comparing the respective detected actual value (I Ist ) with stored target values (I min , I max ) of a target value range (I soll ), the target value range (I sοll ) being determined in a teach mode by means of a multiplicity N of current consumption (I Ist ) of the electric motor was previously detected by the detection module of the motor control during machining with the machining unit on such a component and the mean value (I M ) was determined therefrom, and a component-specific standard deviation σ is determined in order to calculate the lower and upper limit value (I min ) respectively (I max ) of the target value range (I soll ) of the current consumption of the machining unit ; c. Determining whether the actual value (I Ist ) of the current consumption is a permissible value from the target value range (I soll ) and d. Outputting of a signal (S) if the actual value is not a permissible value from the target value range, in order to thereby detect a torque deviation of the rotating machining tool , wherein, in the event of a deviation, a corresponding signal (S) is transmitted to an error counter and, if a predefined number of deviations detected by the error counter is exceeded, a switch-off unit interrupts machining with the machining tool or switches off the electric motor . <EOS>