Method and grinding machine for fabricating a workpiece comprising a helical groove

A method for machining a workpiece by a grinding machine arranged for retaining the workpiece and comprising a rotating abrasive wheel;

• the workpiece comprising a desired helical groove having a predetermined length, a predetermined depth and a predetermined helix pattern to be machined at a surface of the workpiece by means of the abrasive wheel of the grinding machine;
• the method comprising:
• machining calibration groove on the surface according to said predetermined helix pattern and by means of the abrasive wheel;
• wherein the calibration groove has a calibration length that is equal to or smaller than the predetermined length of the desired helical groove and has a calibration depth that is smaller than the predetermined depth of the desired helical groove;
• determine an abrasive wheel dimension of the abrasive wheel by measuring the calibration depth;
• using said determined abrasive wheel dimension for machining the desired helical groove on said surface by means of said abrasive wheel.