Nkọwa usoro:A na-awụnye ihe na-arụ ọrụ n'ime hopper m (ya na mmiri) site na etiti ihe, ma enwere ngwaọrụ vibration n'okpuru hopper. Ngwaọrụ na-ama jijiji na-arụ ọrụ iji kesaa ihe arụrụ arụ na hopper na eriri ebu ebuli elu. Enwere oghere ndọta siri ike na azụ nke eriri ebu, nke na-eme ka arụ ọrụ ahụ na-agba ọsọ na trajectory na-acha uhie uhie n'elu. Mgbe oghere magnetik siri ike ruru n'elu, a na-emegharị ya, na workpiece dabara n'ụgbọelu na-arụ ọrụ na-esote nke usoro ahụ.