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Adedipe Jide Olusegun
Forestry research institute of Nigeria
Aerospace Engineering Automotive Engineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering

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Performance Evaluation of A Coconut Grating Machine Adedipe Jide Olusegun; Yusuf I.O; Oyeleke O.S
METALOGRAM Metalogram Vol.2 No.2 (April, 2026)
Publisher : Universitas Riau Kepulauan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33373/mtlg.v2i2.8576

Abstract

This study evaluates the performance of a locally fabricated coconut grating machine developed to address the inefficiencies, safety risks, and high labour demand associated with manual coconut grating. The machine operates on the principles of rotation and shearing. It comprises an electric motor, a stainless-steel grating shaft, a collector, and a reinforced support frame. A performance assessment was conducted using replicated trials to determine workability, throughput capacity, grating efficiency, and material loss. The evaluation involved measuring the initial and final weights of coconuts over twenty grating cycles. Results showed that the machine achieved a mean efficiency of 98%, attributed to its optimized shearing mechanism and minimal product loss (0.002 kg over an average grating duration of 59 s). Throughput capacity ranged from 0.16 to 0.77 kg/s, significantly surpassing manual grating operations. Graphical illustrations demonstrated that throughput increased with increasing material weight, while efficiency slightly declined at reduced loading; this could indicate that the machine performed optimally under moderate-to-high feed weights. Comparisons with manual grating revealed similar weight-loss trends but superior speed and safety advantages for the machine. Overall, the developed coconut grating machine offers a safe, efficient, and scalable solution for households and small-scale processors. For future improvements, focus could be on reducing clogging and enhancing adaptability to different coconut varieties.
Performance Evaluation Of A Motorized Potato (Ipomoea Batata L.) Peeling Machine Adedipe Jide Olusegun; Adepoju Y.A; Yusuf I.O; Oyeleke O.S
METALOGRAM Metalogram Vol.02 No.1 (December,2025)
Publisher : Universitas Riau Kepulauan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33373/mtlg.v2i1.8452

Abstract

This study evaluates the performance of a simple motorized potato (Ipomoea batatas L.) peeling machine. Evaluation parameters include peeling efficiency, weight loss, machine speed, and capacity. It highlights the correlations and variations between these parameters using graphical illustrations. The materials used were categorized into component materials, measuring tools and potato samples. Peeling operation was carried out and replicated 20 times. Results revealed an average weight loss of 27.5g, suggesting a well-calibrated blade engagement, a mean speed of 3.1 potatoes min, an average throughput of 450g/min and an average efficiency of 86.16%. There was a strong positive linear relationship between the initial weight and the final weight which infers a uniform peeling across all sizes. There was no consistent correlation between weight loss and throughput; this suggests that throughput was not tied to peeling aggressiveness, allowing focus on waste minimization without compromising output. Result revealed that as speed increases, throughput also increases, implying that speed was a productivity driver. There was an inverse relationship between weight loss and efficiency; high losses could signal over-aggressiveness. Efficiency was fairly high across all speeds ranging between 84.44 – 87.88 %, but tends slightly dip at the highest speeds. This suggests that increasing can slightly reduce peeling accuracy. In conclusion, the machine reveals a robust yet improvable machine for potato peeling. We therefore recommended that a sorter, speed controller and a feedback sensor be attached for optimization.
Optimization of Droplet Distribution and Spray Pattern Uniformity on a Multi-Nozzle Mobile Compression Pump (MMCP) Sprayer Adedipe Jide Olusegun
METALOGRAM Metalogram Vol.02 No.3 (August,2026)
Publisher : Universitas Riau Kepulauan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33373/mtlg.v2i3.9417

Abstract

This study evaluated MMCP sprayer under pump pressures between 150 – 450 kPa, nozzle height of 0.30 – 0.90 and speed of 0.10 – 0.45 m/s. Water was used with fluorescent tracer dye for patternator-based distribution. Response variables were coefficient of variation (CV) of spray, volume median diameter (VMD), drift loss, swath width, application rate, and field capacity. Results showed that pump pressure of 300 kPa produced the most uniformed spray distribution of CV of 7.3%. It had VMD of 261 μm classified as a medium-to-coarse spray. Spray drift increased above 350 kPa to 15.4% at 450 kPa; this exceeded the acceptable 5% threshold. Nozzle height of 0.50 – 0.55 m minimized distribution CV of 6.9 – 7.3%. This provides an effective swath width of 0.74 – 0.89 m. Application rate declined with increased speed, from 1,121 L/ha at 0.10 m/s to 249 L/ha at 0.45 m/s. Field capacity increased to 0.486 ha/h at the highest speed. Comparative tests confirmed that the MMCP achieved a field capacity of 0.302 ha/h; 5.3 times of manual knapsack which was 0.057 ha/h and can be compared in efficiency to motorized alternatives in capital and running costs. These findings confirmed its suitability as a technology for smallholder crop protection operations.
Co-Authors Adepoju Y.A Oyeleke O.S Yusuf I.O