Vorrichtung zum Feststellen des Arbeitszustands in einer Werkzeugmaschine

摘要

An apparatus for detecting machining conditions in a machine tool characterised by a non-contact type displacement detector means (20) for detecting predetermined displacement of a part (8) of a workpiece or tool carrying member (8,9; 15) of a machine tool and for producing detection signals in relation thereto; a plurality of different frequency band pass filters (33,34,35) coupled to the detector means (20) so as to receive the detection signals from the latter; and comparator means (36b,36c,36d) for comparing output signals of said different frequency band pass filters (33,34,35) with respective set values.