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In this study the operational speed of screw based pick and place mechanism was compared with that of a crank-rocker based pick and place mechanism analytically for the design of a seeding machine for system of rice intensification (SRI) seedling tray. The configurations of the two types of mechanisms were generated based on their positions relative to a seedling tray conveyor, seed container and size of seeding manifold. The screw based mechanism consists of a vertical screw to which the seeding manifold was mounted and a horizontal screw to which the vertical mechanism was mounted. The vertical screw bearing the seeding manifold reciprocates down to pick seeds from seed container and back to the initial position. The horizontal screw translates horizontally to deliver the vertical screw bearing the seeding manifold to the seedling tray on the conveyor. The crank-rocker based mechanism consists of a pair of crank-rocker carrying a seeding manifold in between them. The mechanism rotates clock wise to pick seed and counter clock wise to drop the seed on the seedling tray. The time required for a complete pick and place circle was computed for both mechanisms using basic mechanics principles. Crank-rocker mechanism with a theoretical pick and place period of 1 second was found to be better than the screw based mechanism with 78.8 second per pick and place circle.


Seedling tray seeding screw mechanism crack rocker mechanism speed of operation

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How to Cite
Abdulkadir, T. D., Mahadi, M. R. ., Wayayok, A. ., & Kassim, M. S. . (2021). Analytical Comparison between the Speed of Screw and Crank-Rocker BasedPick and Place Mechanisms for Seedling Tray Seeding Machine. Basrah Journal of Agricultural Sciences, 34, 108–118.


  1. Abdulkadir, T. D., Mahadi, M. R., Wayayok, A., & Kassim, M. S. (2019). Optimization of vacuum manifold design for seeding of SRI seedling tray. CogentEngineering,6:1.
  2. Angeles, J., Morozov, A., & Navarro, O. (2000). A Novel manipulator architecture for the production of scara motions. In Proceedings of the 2000 ICRA Millennium Conference IEEE International Conference on Robotics and Automation, 3, 2370–2375.
  3. Bashar, Z. U., Wayayok, A., Amin, M. S. M., Mahadi, M. R., & Ehsan, S. D. (2015). Single seedling nursery tray: An innovative breakthrough to quality seedling raising technique for SRI transplanting machine. Research Journal of Applied Sciences, Engineering and Technology, 10, 1258–1265. rjaset.10.1820.
  4. Bharadwaj, N., Kalbandhe, S., Hepat, M., Shende, R., & Sahare, P. P. H. (2018). Design and fabrication of pneumatic arm.International Research Journal of Engineering and Technology, 5, 2762–2767.
  5. Myszka, D. H. (2012). Machines and Mechanisms: Applied Kinematic Analysis, 4th ed. New Jersey, U., Pearson Education Inc.376pp.
  6. Ellis, K. P., Vittes, F. J., & Kobza, J. E. (2001). Optimizing the performance of a surface mount placement machine. electronics packaging manufacturing, IEEE Transactions On, 24, 160–170.
  7. Ibrahim, K., Ramadan, A., Fanni, M., Kobayashi, Y., Abo-Ismail, A., & Fujie, M. G. (2015). Development of a New 4-DOF endoscopic parallel manipulator based on screw theory for laparoscopic surgery. Mechatronics, 28, 4–17.
  8. Jain, R. K., Majumder, S., Ghosh, B., &Saha, S. (2015). Design and manufacturing of mobile micro manipulation system with a compliant piezoelectric actuator based micro gripper. Journal of Manufacturing, 35, 76–91.
  9. Karimi Eskandary, P., & Angeles, J. (2018). The translating π-joint: design and applications. Mechanism and Machine Theory, 122, 361–370.
  10. Koutsoyiannis, D., & Angelakis, A. N. (2003). Hydrologic and Hygraulic Science and Technology in Ancient Greece. In Encyclopidia of Water Science (pp. 415–417). Mercel Deckker Inc. 270 Madison Avenue, New York 10016 120016393
  11. Li, X., Chen, W., Lin, W., & Low, K. H. (2017). A Variable stiffness robotic gripper basedon structure-controlled principle. IEEE Transactions on Automation Science and Engineering, 1–10.
  12. Liu, X. J., & Wang, J. (2003). Some new parallel mechanisms containing the planar four-bar parallelogram.International Journal of Robotics Research, 22, 717–732.
  13. Lokhande, T. G., Chatpalliwar, A. S., & Bhoyar, A. A. (2012). Optimizing efficiency of square threaded mechanical screw jack by varying helix angle. International Journal of Modern Engineering Research, 2, 504–508.
  14. Magdy, M., Elgammal, A. T., & Mohamed, A. M. (2016). New fuhy decoupled manipulator with three translational motion for pick and. In The 2nd International Conference on Control, Automation and Robotics. Hong Kong: IEEE, 258–262.
  15. Nishimura, T., Tennomi, M., Suzuki, Y., Tsuji, T., & Watanabe, T. (2018). Lightweight, high-force gripper inspired by chuck clamping devices. IEEE Robotics and Automation Letters,3,1.
  16. Repcic, N., Saric, I., & Avdic, V. (2012). Theoretical Reviews on how to improve the degree of efficiency on power screws.In Proceedings of the 16th International Research/Expert Conference „Trends in the Development of Machinery and Associated Technology” TMT 2012, 511–514.
  17. Sclater, N., & Chironis, N. P. (2011). Mechanism and mechanical devices source book, Third Edition. London: McGraw-Hill
  18. Trinh, G., Copplestone, G., O’Connor, M., Hu, S., Nowak, S., Cheung, K., & Cellucci, D. (2017). Robotically assembled aerospace structures: Digital material assembly using a gantry-type Assembler. In IEEE Aerospace Conference Proceedings (pp. 1–7). Big Sky, MT, USA.
  19. Wang, H., Liu, Y., Li, M., Huang, H., Xu, H. M., Hong, R. J., & Shen, H. (2010). Multifunctional TiO2nanowires-modified nanoparticles bilayer film for 3D dye-sensitized solar cells. Optoelectronics and Advanced Materials, Rapid Communications, 4, 1166–1169.
  20. Xiao, S., & Li, Y. (2012). Mobility and Kinematic Analysis of a Novel Dexterous Micro Gripper. Proceedings - IEEE International Conference on Robotics and Automation, 2523–2528.
  21. Xin-Jun Liu, Feng Gao, Li-Ping Wang, & Jinsong Wang. (2001). On the Analysis of a New Spatial Three-degrees-of-freedom Parallel Manipulator. Robotics and Automation, IEEE Transactions On, 17, 959–968.
  22. Yannopoulos, S. I., Lyberatos, G., Theodossiou, N., Li, W., Valipour, M., Tamburrino, A., & Angelakis, A. N. (2015). Evolution of water lifting devices (pumps) over the centuries worldwide.Water, 7, 5031–5060.