Browsing by Author "Sibanda, V."

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    Design of a Control System for a Vending Machine
    (Elsevier, 2020) Murena, E.; Sibanda, V.; Sibanda, S.; Mpofu, K.
    Vending machines are available in many public places for vending of items like snacks, beverages, newspapers, tickets and smoking cigarettes Recently developed vending machine requires a control system to offer a variety of products to the general public. In this light, this paper, therefore, is aimed at developing a control system for the developed vending machine by developing various inputs required to make the machine function efficiently. The system controls and monitors the vending machine functions, namely: alarm system, product dispensing, refrigeration and payment system. The microcomputer capitalises on the evolution of high-performance processors and stable operating systems to implement control requirements. The project shall use intelligent vending machine input/output board to link other machine peripherals. The control system shall enable the machine to handle coin, mobile and point of sale terminal payment options. Implementation of the control system enhances flexibility in payment, remote machine monitoring and inventory control, and improved user experience through the integration of digital touch screen user interfaces and high-speed transaction processing
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    Reconfiguration ramp-up cost analysis for a reconfigurable guillotine shear and bending press machine
    (Cogent Engineering, 2022-05-28) Sibanda, V.; Mpofu, K.; Daniyan, I.; Ale, F.
    Reconfiguration is an important manufacturing step that allows the system or the machine to change its function or capacity when introducing a new part family. The purpose of this study is to present a method for determining the reconfiguration ramp-cost for the reconfigurable guillotine shear and bending press machine. To achieve this, the development of reconfiguration ramp-up and costing models was demonstrated. This focuses on the analysis of the ramp-up time and the cost of reconfiguring a dual functional reconfigurable guillotine shear and bending press machine. This includes the conversion of the machine from one function to another and length variation as well as the identification of the ramp-up characteristics and reconfiguration requirements for the machine conversion. From the findings of this study, the conversion cost reduces from $0.3965 during the manual operation to $0.0264 for the automatic operation. This amounts to 93.34% reduction in the conversion cost. In addition, the reconfiguration ramp-up cost reduced from $9.05 for the manual process to $8.68 for the automatic process, which amounts to a 4.08% reduction in the cost. It is expected that the findings of this study will allow manufacturing industries to achieve cost-effectiveness per unit time during reconfiguration operations for improved profitability.