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    Printer Printer Presentation Transcript

    • PRINTERS 20 nd June 2011
      • What is a Printer?
        • It is an output device that produces text and graphics on paper.
      • Function - To present data on paper
      • Types of Printer:-
        • Inkjet Printer
        • Laser Printer
        • Dot-Matrix Printer
        • Plotter
    • Dot Matrix Printer
      • Consists of a print head with a number of pins.
      • These pins move in and out to print a character in the form of dots.
      • Printer speed - 100-800 per second (cps)
      • Uses fanfold paper
        • A fanfold paper is a long continuous paper with holes at the edges
      • Printing quality depends on the printer resolution
        • Printer resolution measures how closely the printer can print dots
        • Measured in terms of dots per inch (dpi)
      • Two types of printer quality
        • Draft quality - uses low resolution
        • Near letter quality - uses high resolution
    • Advantage and Disadvantage
      • Advantage
        • It is cheap
      • Disadvantage
        • Very noisy when printing
    • Ink Jet Printer
      • Consists of a print head with a number of tiny nozzles. The ink is pushed through the tiny nozzles onto the paper to form tiny dots
      • Uses A4 papers
      • Printer speed - 2 to 10 pages per minute (ppm)
      • Printer Resolution
        • Draft quality
        • Near letter quality - better quality than dot matrix because ink is darker
    • Advantages and Disadvantage
      • Advantages
        • Quiet when printing
        • Lightweight
        • Quite reliable
      • Disadvantage
        • Expensive than dot matrix printer
    • Laser Printer
      • It prints images by transferring ‘ink powder’ onto a piece of paper using a laser beam
      • Printer speed - 4 to 17 pages pages per minute (ppm)
      • Printer resolution
        • Draft quality
        • Near Letter quality
        • Letter quality
    • Advantages and Disadvantage
      • Advantages
        • Prints faster
        • Better quality
      • Disadvantage
        • Very expensive
    • Differences between the Printers
    • Images are transformed onto a piece of paper with ‘mix powder’ using a laser beam A print head with a no of tiny nozzles. It uses melted wax in cartridge packing to form tiny dots It has a print head with a number of pins. These pins move and form dots on paper MECHANISM Slightly popular Very Popular Less dependent POPULARITY Toner Ink Cartridge Ribbon USED Silence Quiet Noisy NOISE LEVEL 4-17ppm (Fastest) 2-10ppm (Faster) 100-400cps (Slow) SPEED Letter quality Near letter quality Low/Draft quality RESOLUTION Heavy Lighter Bulky SIZE Expensive Cheaper depends on quality and speed Cheap COST Laser Printer InkJet Printer Dot Matrix Printer Printer Type
    • Plotter
      • A device that draws picture on paper based on commands from a computer
      • It differ from printers because plotter draws lines using a pen
      • It can produce continuous lines, whereas printers can only simulate lines by printing a closely spaced series of dots
      • Function - moves special pens across the paper to create a drawing or design
      • Uses by Engineers, Architects and Designers
    • Types of Plotter
      • Three types of Plotter
        • Flatbed Plotters
          • Hold the paper still while the pens move
        • Drum Plotters
          • Roll the paper over a cylinder
        • Pinch-Rollers Plotters
          • Mixture of the two types above
    • Advantages and Disadvantages
      • Advantages
        • Speed - Faster than other printers
        • Precision - Allows to print more precise lines
        • Versatility -It can be hooked up to any computer
      • Disadvantages
        • Can take over half an hour to produce a print, depending on the size and complexity of the image produced
        • Not able to print photo-quality images
        • Cost a bit more than other printers
        • Very large equipment