VERFAHREN ZUR OPTIMIERUNG DER FUNKTION EINER WERKZEUGMACHINE MIT EINER ZUSÄTZLICHEN STANGENFÜHRUNGSEINRICHTUNG UND ENTSPRECHENDE WERKZEUGMASCHINE

The method involves acting on two functional driving units (M1, M2) of a machine tool (1) to cause a speed difference of predetermined value (DV) between two speeds of rotation (V1, V2) of an active part (50) of a work piece spindle (5) and a rotatably bar guiding unit to partially avoid a parasitic event. The event is detectable over one of the machine tool, a bar (3) and a piece (2) and is estimated to be partially attributable to an interaction between a guiding unit (7) and the bar. An independent claim is also included for a machine tool for making by screw cutting a piece, in a bar.