Calculation of Spider Speed in PROTOS2-2 Cigarette Maker and Test on Cut Tobacco Fallout

To find out the relationship between spider's movement and tobacco fallout from cigarette ends in a cigarette transfer system, the analytical model and numerical model of spider mechanism were developed based on the principle of cigarette transfer in PROTOS2-2 cigarette maker, and the movement trajectory, cigarette catching speed and speed difference of suction carriers in spider were calculated separately. The results showed that: 1) The calculation results of analytical model well agreed with those of numerical model. 2) The speed difference between suction carrier and cigarette increased linearly with the increase of production speed. According to the calculation formula, it was proposed to reduce speed difference via enlarging the radius of pitch circle in planetary gear system. 3) The analytical model and numerical model was validated by the test of tobacco fallout, the amount of tobacco fallout positively correlated to production speed.