| Prior to developing a cumin thresher, the efficiency factors of cumin threshing was investigated. The effect of thresher variables including the moisture content, cylinder type and cylinder speed, feed rate and concave clearance on weight percentage of separated seeds, shattered stems and damaged seeds were studied in this research. The results showed that as moisture content increased from 7% to 13%, separated seed and damaged seed decreased from 92.8% to 90.4% and from 10.1% to 7.6%, respectively. However, increasing cylinder speed from 12.8 to 16.5 m/s, increased the percentage of separated seed, shattered stems and damaged seed. The cylinder type did not have significant effect on weight percentage of separated seed, while it had a significant... |
