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.
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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