Plotters and Printers

1. Output Devices

Output devices convert digital information into physical form. In computer graphics, plotters and printers are used to obtain permanent visual output.

• Produce hard copy
• Used for text and graphics
• Permanent output

2. Plotters

A plotter is a special output device used to produce large, high-quality vector graphics drawings such as engineering designs and maps.

• Works on vector graphics
• Uses pen or ink system
• High accuracy output

3. Types of Plotters

• Flatbed Plotter: Paper is fixed, pen moves
• Drum Plotter: Paper moves over rotating drum
• Inkjet Plotter: Uses inkjet technology

4. Advantages and Limitations of Plotters

• Advantages: High precision, large output size
• Limitations: Expensive, slower than printers

5. Printers

A printer is an output device that produces text and graphics on paper. Printers are widely used in homes, offices, and educational institutions.

• Low cost output device
• Supports text and images
• Fast printing speed

6. Types of Printers

• Impact Printers: Dot Matrix
• Non-Impact Printers: Inkjet, Laser

7. Inkjet Printer

Inkjet printers spray tiny droplets of ink onto paper to produce images and text. They are popular for color printing.

• Good color quality
• Low initial cost
• Slower than laser printers

8. Laser Printer

Laser printers use laser beams and electrostatic charges to transfer toner onto paper. They are fast and efficient.

• High printing speed
• Sharp text quality
• Ideal for bulk printing

9. Plotter vs Printer

Plotter                       Printer
---------------------------  ----------------------------
Vector based                  Raster based
Used for large drawings       Used for text & images
High precision                Moderate precision
Expensive                     Affordable

10. Applications

• Engineering drawings
• Architectural plans
• Office documentation
• Graphic design prints

Practice Questions

1. What is a plotter?
2. List types of plotters.
3. Differentiate plotter and printer.
4. Explain inkjet and laser printers.
5. Write applications of plotters.

Practice Task