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GRAPH PLOTTERS

GRAPH PLOTTERS.

GRAPH PLOTTERS are output devices that produce graphics, such as diagrams, maps, images, statistical charts etc, on paper.

GRAPH PLOTTERS use pens of different types, varying thickness & different colours, in order to plot.  The pens are usually under the direct or indirect influence of electronic pulses output by the computer.

Plotters are described/ named depending on the type of the base onto which the stationery is placed for the graphical output to be produced onto the paper.

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The 2 commonly available Graph plotters are: –

  • The Drum plotter.
  • The Flatbed plotter.

Characteristics of Graph Plotters.

  • They are large in size.
  • They use Ammonia papers.
  • They use special ink.
  • Have a wide carrying capacity.

Uses/ applications of Graph Plotters.

Graph Plotters are used: –

  • In Computer Aided Design (CAD) – are mainly used for printing large architectural or engineering drawings.  In this case, the computer is used to form the graphical design & the Plotter produces the output.
  • In Weather forecasting for drawing Isobars on weather maps.
  • In Statistical work for producing graphs or complicated mathematical formulas.
  • In Cartography to produce contour maps.
  • In Craft & Textile industry for drawing designs.

Advantages of Graph Plotters.

  • Can produce information in an easily understandable form.
  • Their presentation is quick & reliable.
  • They produce large graphical designs of high quality, which are easy to read & use.
  • A Plotter can be used to print even on A1 sized papers, while the largest paper size that can be used with a normal printer is A3.

Disadvantages of Graph Plotters.

  • They require Graphic software, which is usually very expensive.
  • Graph plotters operate at low speeds, hence are normally connected in an Off-line mode to avoid wasting the computer time.

Read More on PRINTERS AS OUTPUT DEVICES HERE.

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