FIELD: grinding of substances. SUBSTANCE: laboratory vibratory mill is furnished with a clamping device connected to the mill drum by means of a spring cantilever beam or plate. Free resonance vibrations of the cantilever are initiated, boosted and maintained automatically by an electronic device operating in step with cantilever vibrations. The attained accuracy of frequency measurement is ± 0.001 Hz, and that of amplitude measurement is + 0.001 cm. An example of quantitative determination of dissipation channels of delivered mechanical energy is given. EFFECT: improved design. 3 cl, 1 dwg
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