Your SlideShare is downloading. ×
Upcoming SlideShare
Loading in...5

Thanks for flagging this SlideShare!

Oops! An error has occurred.

Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply



Published on

Published in: Technology

  • Be the first to comment

No Downloads
Total Views
On Slideshare
From Embeds
Number of Embeds
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

No notes for slide


  • 1. 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
  • 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.