Method of diagnosis of a machine tool, corresponding machine tool and computer program product

A method, comprising:

• performing diagnosis of operation of a machine tool comprising at least one sensor coupled to said machine tool, wherein the machine tool comprises an end-effector configured to be moved along one or more axes of a working envelope by one or more actuators,
• said method comprising operations of:
• generating a programming sequence of movement of the end-effector along one or more axes of said machine tool, wherein the programming sequence comprises machining-programming sequence instructions to apply at least one single impulsive variation of a kinematic quantity of movement of the end effector along one or more axes;
• controlling the movement of the end-effector along one or more axes of said machine tool by means of a control chain comprising:
• performing said operation of generating said programming sequence, obtaining as a result a trajectory of movement for actuation of one or more axes of said machine tool from said programming sequence, and
• supplying said trajectory of movement for actuation of one or more axes of said machine tool to actuators of said one or more axes;
• receiving a read-out signal of said at least one sensor coupled to said machine tool;
• and
• processing said read-out signal of said at least one sensor coupled to said machine tool,
• generating a reference read-out signal corresponding to the machining-programming sequence without the at least one single impulsive variation;
• comparing said read-out signal with the reference read-out signal;
• and
• modifying the read-out signal based on the comparison;
• wherein said impulsive variation is included in a machining-programming sequence predetermined on the basis of a workpiece to be machined within the working envelope of the machine tool,
• said machining-programming sequence comprising instructions that apply at least one single impulsive variation of a kinematic quantity of movement of the end-effector with respect to one or more actuators in said trajectory of movement, so that the at least one single impulsive variation-propagates through said control chain,
• wherein said operation of processing said read-out signal comprises processing a response of said machine tool to said at least one single impulsive variation included in the machining-programming sequence, and wherein said operation of processing said read-out signal comprises an artificial-neural-network processing via one or more artificial neural networks configured for analysing one or more signals indicative of the status of the machine tool in said read-out signal.