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Laser Printer: Laser printer prints the contents by laser technology. It is fast in operation as it operates in
a similar manner as photocopy machines. The laser beam makes a shadow of the images with the help of
toner and transfers them on paper.
It is also known as a ‘Page Printer’ because it actually stores the content of the page in memory before
printing it. It can print up to 5 to 300 pages in a minute and the resolution output ranges from 600 dpi to
2400 dpi.
Plotter
Plotter is an output device that helps in printing high-quality posters, exes, visuals, charts, graphs, tables
and diagrams, etc. It can draw continuous lines and can produce output on paper, polyester film or coloured
transparencies. In the plotter, the figures are drawn by an electronic pen which is driven by a motor. It uses
inkjet cartridges (single or multicoloured) to spray colours for drawing and sketching.
Plotter is mostly used in CAD (Computer Aided Design), CAM (Computer Aided Manufacturing) and for
printing banner and DTP (Desktop Publishing) exes. Plotter can be classified into four categories:
Flatbed Plotter: It consists of a fixed horizontal at surface on which paper or any other medium is fixed.
The pen is mounted on a carriage that moves along the horizontal and vertical axis to print over the
medium.
Drum Plotter: It consists of one or more pen(s) which move across the drum. The output medium is
placed over the drum. The drum rotates either clockwise or anticlockwise under the control of plotting
instructions sent by the computer. The pen is mounted on the carriage and moves along with the carriage
either ‘left to right’ or ‘right to left’ from paper to print.
Micrographic Plotter: In this type of plotter, the paper or other medium is held on both sides at the edges
by pinch wheels which give back-and-forth movement to the paper while printing. It does not print over
the drum.
62 Touchpad Information Technology-IX

