Harakati za mzunguko wa mfumo wa kufuta wa mashine ya mchele ni harakati za mzunguko wa mchele. Kupindua ni harakati za mzunguko wa mwelekeo mrefu wa mchele, wakati kuzunguka ni harakati za mzunguko wa mwelekeo mfupi wa mchele. Katika mchakato wa kufuta wa mashine ya mchele, mchele lazima uwe na harakati za kuzunguka ili kuruhusu sehemu zote za mchele kupokea athari ya kufuta ya mashine ya mchele kwa usawa, ili kuepuka hali ya kufuta isiyotosha au kusagwa kwa sehemu. Kuna njia tatu za kuzipata.
1. Rolling caused by white roller tendons (grooves) of rice mill. The direction of the velocity when the rice grain is separated from the rib (groove) is at an Angle with the tangent line, which makes the rice grain produce more collisions and rolls more times on a circumference.
2. Rolling caused by rice milling cutter, screen hole and convex point. The rice grain moves with speed. When it reaches the rice knife, the edge of the rice knife will bounce back Different “angles make the grains of rice roll. When there are many milling cutters, screen holes and convex points in the whitening room, there are many tumbling times, and vice versa. However, the number cannot increase indefinitely, which is limited by the whitening chamber structure and factors influencing the process effect.
3. Kupiga kwa mlipuko wa hewa kutoka kwa mashine ya mchele. Kupuliza kwa mchele kumekuwa ikienea zaidi, upepo chini ya shinikizo fulani kutoka ndani ya roller nyeupe hadi kwenye uso wa mashimo au nyufa, kasi ya upepo inayomiminwa kwa kawaida ni kubwa kuliko kasi ya kusimamishwa kwa mchele. Wakati hewa inaingia kwenye chumba cha kufuta cha mashine ya mchele, ujazo unapanuka, shinikizo linapungua, na mtiririko wa mchanganyiko wa hewa huundwa.