A conical suspended sieve, with oscillatory circular motion, was tested for rapeseeds screening, in order to estimate the influence of oscillation parameters on the separation process. Amplitude and frequency of oscillation were modified, as well as the feed flow with material. Distribution curves were drawn for the separated seeds under the sieve for various distanced from the top edge of the sieve, where feeding was made. By regression analysis by means of Gauss distribution law, were determined the coefficients of distribution function and the correlation with the experimental data. By determining the position of the peak of distribution curve depending on the working regime parameters was estimated the influence of oscillation amplitude on the process of seeds separation.
