Browsing by Author "Waqas Asghar"

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    PLC based automation of carding section
    (UMT Lahore, 2011-05-31) Iqbal Hussain; Waqas Asghar; M. Ghayyas Khan; Muhammad Sajid Khan
    The use of control systems such as computers to control industrial machinery and processes, replacing human operators, is called automation. Automation greatly reduces the need for human sensory and mental requirements and provides control without human intervention. It provides facilities such as moving heavier loads accurately, precise positioning, moving very fast or very slowly, reduced manual handling, and improved efficiency. We have used a programmable logic controller (PLC) for the automation of a carding machine. A programmable logic controller is a device that was invented to replace the necessary sequential relay circuits for machine control. It works by monitoring its inputs and, depending on their state, turning its outputs on or off. The user enters a program, usually via software, that produces the desired results. A programmable logic controller is a user-friendly, microprocessor-based specialized computer that carries out control functions of many types and levels of complexity. Its purpose is to monitor crucial process parameters and adjust process operations accordingly. A carding machine is used for the alignment of threads, and thus uniform sliver is produced. A by-product in the form of garbage is also obtained. Different types of carding machines are available in the market, but in past years many carding machines were manually operated or lacked effective control mechanisms for garbage collection. These machines were time-consuming, had low production rates, high costs, and required increased manpower. To overcome these problems, the carding machine needs to be automated. Automation of the carding machine requires control of many digital inputs and outputs.
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    A question mark on emerging zinc-related nutritional deficiencies in Pakistani population
    (Asia-Pacific Journal of Public Health, 2018) Waqas Asghar; Wahab Nazir; Nauman Khalid
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    A question mark on emerging zinc-related nutritional deficiencies in Pakistani population
    (Asia-Pacific Journal of Public Health, 2018) Waqas Asghar; Wahab Nazir; Nauman Khalid