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  • 1. PRINTERS 20 nd June 2011
  • 2. INTRODUCTION
    • 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
  • 3. 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
  • 4. Advantage and Disadvantage
    • Advantage
      • It is cheap
    • Disadvantage
      • Very noisy when printing
  • 5. 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
  • 6. Advantages and Disadvantage
    • Advantages
      • Quiet when printing
      • Lightweight
      • Quite reliable
    • Disadvantage
      • Expensive than dot matrix printer
  • 7. 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
  • 8. Advantages and Disadvantage
    • Advantages
      • Prints faster
      • Better quality
    • Disadvantage
      • Very expensive
  • 9. Differences between the Printers
  • 10. 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
  • 11. 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
  • 12. 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
  • 13. 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
  • 14.