FIELD: measurement technology, examination of operational conditions of driving mechanisms and kinematic diagrams. SUBSTANCE: gear has two diamagnetic discs-cups each carrying ring of film magnetic carrier, put on different sections of inspected object, cathode-ray oscillographic indicator, illumination mode switch. Universal magnetic head is installed immobile in opposition to each ring of film magnetic carrier. Additional pair of magnetic heads is mounted opposite to both rings for cophasal circular displacement. Pair of sine-cosine transducers fixed near boundaries of dynamically deformed region of revolving object is employed in the capacity of primary converters of angular position of inspected object. Gear is supplemented with switches of brightness modulation, brightness attenuation of cyclograms and cyclogram inversion. EFFECT: possibility of inversion of polarity of reproduced cyclograms with simultaneous display of main and inverted polar cyclograms, timely brightness attenuation of individual cyclograms and formed curvilinear ring figures. 2 cl, 4 dwg
