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Printers & Ploters
What is a Printer?
A printer is an electromechanical device which converts
the text and graphical documents from electronic form to
the physical form. Generally they are the external
peripheral devices which are connected with the
computers or laptops through a cable or wirelessly to
receive input data and print them on the papers. A wide
range of printers are available with a variety of features
ranging from printing black and white text documents to
high quality colored graphic images.
*overview of printers
      *daisy wheel printers
        *dot matrix printer
             *inkjet printer
              *laser printer
*other high quality printers
Overview of printers
*categorizing printers
*evaluating printers
–

 Printers fall in two categories
*impact printers user device to strike an inked
  ribbon ,pressing ink from the ribbon on to
  the paper.
*Non-impact printers use different methods
  to place ink(or another substance) on the
  page.
 When evaluating printers, consider four criteria
*image quality –measured in dots per inch(dpi).most
  printers produce 300 to 600 dpi.
*speed-measured in pages per minutes(ppm) or
  characters per seconds(cps).
*initial cost-consumer printers cost $250or less, but
  professional printers can cost thousands of dollars.
*cost of operations-this refers to the cost of supplies
  used by the printers.

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Surbhi fcpit ppt. copy

  • 2. What is a Printer? A printer is an electromechanical device which converts the text and graphical documents from electronic form to the physical form. Generally they are the external peripheral devices which are connected with the computers or laptops through a cable or wirelessly to receive input data and print them on the papers. A wide range of printers are available with a variety of features ranging from printing black and white text documents to high quality colored graphic images.
  • 3. *overview of printers *daisy wheel printers *dot matrix printer *inkjet printer *laser printer *other high quality printers
  • 4. Overview of printers *categorizing printers *evaluating printers
  • 5. –  Printers fall in two categories *impact printers user device to strike an inked ribbon ,pressing ink from the ribbon on to the paper. *Non-impact printers use different methods to place ink(or another substance) on the page.
  • 6.  When evaluating printers, consider four criteria *image quality –measured in dots per inch(dpi).most printers produce 300 to 600 dpi. *speed-measured in pages per minutes(ppm) or characters per seconds(cps). *initial cost-consumer printers cost $250or less, but professional printers can cost thousands of dollars. *cost of operations-this refers to the cost of supplies used by the printers.
  • 7. Daisy Wheel Printers Daisy wheel printers print only characters and symbols and cannot print graphics. They are generally slow with a printing speed of about 10 to 75 characters per second. By 1980 daisy wheel printers were the dominant printers for quality printing but since the prices of laser and inkjet printers have declined and quality of dot matrix printers has been improved, the daisy wheel printers are now obsolete.
  • 9.  how do dot-matrix printers work?  performance
  • 10.  These are a common type of impact printers.  Its printer’s print head contains a cluster of pins. The printer can push the pins out to form patterns in rapid sequence.  The pins press an inkedribbon against the paper, creating an image.
  • 12. Lower- resolution dot matrix printers use 9 pins . Higher- resolutions models have 24 pins. Speed is measured in characters per seconds. Some dot matrix printers print 500 cps.
  • 13.  How do ink jet printers work?  performance
  • 14.  These are an example of non impact printers.  These spray tiny droplet of ink onto the paper.  These are available for color and black and white printing.
  • 16.  Ink jet printers offer speed of(2-4 ppm) and resolution of (300-600 dpi). Comparable to low-end laser printer.  Ink jet printers are inexpensive and have low operating costs.
  • 17. How do laser printers work? Performance.
  • 19.  These are non impact printers.  They use heat and pressure to bond particles of toner to paper.  They are available for color and black and white printing.
  • 21. They provide resolution from 300- 1200 dpi and higher. Black and white usually produce 4- 16 ppm. Laser printers produce higher- quality print than ink jet printers , but are more expensive.
  • 22. Print shops and publishers use these printers to create high-quality color images: *Thermal-wax *Dye-sublimation *Fiery *IRIS
  • 23. Some special types of printers Photo Printer – These inkjet printers are color printers that produce photo lab quality pictures on photo papers. Although they can also be used to print documents but they are specially designed for printing the photo. They have a large number of nozzles that can print very fine droplets to enhance the image quality. They can print a 4 x 6 inch photos directly from the digital cameras without need of a computer.
  • 25. Dye Sublimation Printers – These are latest innovative printers that are specially designed for high quality photo printing. They magnetize the ink over a charged paper to produce a very high quality picture. These printers are suitable to photo hobbyists but are a quite expensive.
  • 26. Portable Printers - They are small light weight inkjet or thermal printers specially designed for the users to carry out with the laptops while travelling. Generally these printers have a lower quality for image printing and higher cost because of its compact design.
  • 28. Plotter is a computer printer to print vector graphics. In the past, plotters were used in applications such as computer- aided design, though they have generally been replaced with wide-format conventional printers. It is now commonplace to refer to such wide-format printers as "plotters," even though they technically aren't. * Overview Pen plotters print by moving a pen or other instrument across the surface of a piece of paper. This means that plotters are restricted to line art, rather than raster graphics as with other printers. Pen plotters can draw complex line art, including text, but do so slowly because of the mechanical movement of the pens. They are often incapable of efficiently creating a solid region of color, but can hatch an area by drawing a number of close, regular lines. Plotters offered the fastest way to efficiently produce very large drawings or color high-resolution vector-based artwork when computer memory was very expensive and processor power was very limited, and other types of printers had limited graphic output capabilities. Pen plotters have essentially become obsolete, and have been replaced by large- format inkjet printers and LED toner based printers. Such devices may still understand vector languages originally designed for plotter use, because in many uses, they offer a more efficient alternative to raster data.
  • 29. Types of a Plotters There are three types of Plotters. They are the Drum Plotter, The Flat bed plotter and also the Inkjet Plotter. All of the three types are explained explicitly in the below mentioned lines. In the past a plotter was widely used in application such as the CAD, though it doesn't happen that way anymore.
  • 30. The Drum Plotter Have you ever sat and spent time to ponder over what a plotter ever did? Apparently, the Drum Plotter happens to be an output device. In case of the Drum Plotters the pen is motioned on a single axis track while the paper itself moves on a cylindrical drum in a perfect bid to add another axis to the same. That's the reason why the size of the graph is limited only by the width of the drum and can be of any length. The Flat bed Plotter This is yet another output device associated with a plotter for it is one of the three types of a plotter. Now in case of the Flat bed Plotter, the paper is fixed on a flat surface while the pens are motioned to draw the image. This is the plotter type which can successfully use several colored pens for the purpose so that the effect is different from the regular.
  • 31. The Inkjet Plotter This is the third kind of Plotter which is called as the Inkjet plotter. It effectively pushes beads of ink directly onto the medium. In Today's world, virtually all inkjets create colour. Low- end inkjets make the most of the three ink colours (cyan, magenta and yellow), but finally create a complex black that is often mud-spattered. Four-color inkjets make use of the black ink created for pure black printing alone.