Development and Evaluation of Mango Grader

A computerized grading machine was developed and evaluated to grade Alphonso mangoes on weight basis in five grades. A logistic software was developed to run the grader. The performance of the grader was evaluated at four speeds (480, 600, 720 and 840 m/s), four microprocessor settings (B₁, B₂, B₃ and B₄) and their effect was observed on five grades of mango viz., Grade I (326–375 g), Grade II (276–325 g), Grade III (226–275 g), Grade IV (176-225g) and Grade V (< 175 > 376 g) for single lane. The statistically analyzed data showed maximum capacity of 950 kg/h with maximum grading efficiency of 95.13% at 720 m/s speed and B₄ setting. The cost of manual grading was Rs. 350/t as against Rs. 190/t for the grader.