Specific Cutting Energies for Various Parts of Cassava Plants Obtained from the Pendulum Principle Adapted with Bi-Axial Cutting Force Measuring Device
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Abstract
Cassava is a versatile plant due to all parts of this plant from top to root could be used for a number of purposes, particularly, cassava root. Cassava harvesting processes are involved some steps such as top and stem cutting, cassava tuber cutting, specimen collecting and size reduction of tuber for processing. Generally, cutting is used in several stages of the cassava harvesting process. This research was aimed to evaluate the dynamic force for further development of the suitable equipment for cassava farm. The pendulum 2-Axis cutting force principle for cassava cutting process was constructed and consisted of 4 parts: frame, cutting force measurement, cutting energy measurement, and data processing system. The cutting process was done at 3 different cutting angles of 15, 30 and 45 degrees. The results revealed that, when considering the lowest specific cutting energy, the suitable cutting angle for the top part of cassava stem, cassava tuber peduncle, and cassava tuber was 30 degree, specific cutting energies of 3.72, 5.46, and 0.35 joulespersquarecentimeter, respectively, were used. Whereas, cutting the cassava peduncle could be done at cutting angle of 45 degree, uses a specific cutting energy of 7.54 joules per squarecentimeter. It was clearly observed that cutting the end of cassava stem base which is the hardest part was taken the maximum specific cutting energy and specific maximum cutting force. On the other hand, the top end of cassava stem is consisted of soft tissue therefore the cutting was applied at the lowest specific cutting energy and specific maximum cutting force. To conclude, the pendulum principle cutting could measure the cutting energy and cutting force for cassava cutting process, including for assessment of the other agricultural product cutting force and cutting energy.
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