Method for compensating milling cutter deflection

A system, comprising:

• a numerical control for a machine tool having a plurality of axes, wherein the numerical control is adapted to perform a method for compensating for deflection of a milling cutter during processing of a workpiece, the method including:
• performing a learning cut on a test workpiece having a known geometry using the milling cutter mounted on a tool spindle in a climb milling mode;
• ascertaining a linear correlation between a quantity that is proportional to torque of a drive of the tool spindle and the deflection of the milling cutter normal to a surface of the test workpiece, the deflection being determined by comparing an actual contour of the test workpiece to a setpoint contour;
• storing the linear correlation for the milling cutter;
• and
• machining the workpiece by the milling cutter using the climb milling mode, and utilizing the stored linear correlation in order to compensate for the deflection of the milling cutter by applying a positional correction that is proportional to the quantity to a setpoint position of the axes of the machine tool.