EN
Authors present ivestigation results of a belt separator designed in Institute of Agricultural Machines and Equipment, Academy of Agriculture and Technology in Olsztyn. The belt separator is provided to buckwheat seed separation from difficult to isolate impurities such as replum of wild radish, grain of rye, wheat and barley. The optimum values of constructional - operating parameters were determined. The matematical formulas describing the relationships among the above mentioned parameters and cleaning quality indices were also proposed.