plotters are output devices.They are used to produce precise and good quality graphics and drawing under computer's control.They use ink pen or ink-jet to draw graphics or drawings.Either single color or multicolours pens can be employed.The pens are driven by motor.Drawing can be prepared on paper,vellum or mylar (polyster film). colour transparency can also be prepared.
Pen plotters are slow devices.The graphics and drawing produced by pen plotters are uniform and precise,and they are of very good quality. they are used for low to medium volume job. A pen plotter can make from several seconds (for simple drawing) to several minutes (for complex drawings) to produce a drawing. ut it takes much less time as compared to traditional hand methods of producing drawings . A complex drawing which can take about a month by traditional hand method can be produced in less than an hour using plotters.
the pen plotter may be classified into the following types:
Drum plotters:
A drum plotter contains a large cylinder and a pen carriage . the paper is placed over the drum (i.e. cylinder). The drum rotates back and forth to give up and down movement . The pen is mounted horizontally on the carriage. The pen moves along with the carriage left to right or right to left on the paper to produce drawings . Under the computer control both the drum and the pen move to produce the desired drawings. Several pens with ink of different colours can be mounted on the carriage for multicolour drawings. Since each pen is program selectable, a multicoloured drawing can be produced.
Microgrip plotter:
Such plotter don't use drums. The paper or any other medium is held(gripped) on both sides at the age y pinch wheels which give back and forth paper movement. With such plotters high performance is attained at a low cost.
Flat-Bed plotters:
Some plotters employ ink-jets in place of ink pens. The paper is placed on a drum and the ink-jets with different-coloured ink are mounted on a carriage. Such plotters are capable of producing multicolour large drawings.
Pen plotters are slow devices.The graphics and drawing produced by pen plotters are uniform and precise,and they are of very good quality. they are used for low to medium volume job. A pen plotter can make from several seconds (for simple drawing) to several minutes (for complex drawings) to produce a drawing. ut it takes much less time as compared to traditional hand methods of producing drawings . A complex drawing which can take about a month by traditional hand method can be produced in less than an hour using plotters.
the pen plotter may be classified into the following types:
Drum plotters:
A drum plotter contains a large cylinder and a pen carriage . the paper is placed over the drum (i.e. cylinder). The drum rotates back and forth to give up and down movement . The pen is mounted horizontally on the carriage. The pen moves along with the carriage left to right or right to left on the paper to produce drawings . Under the computer control both the drum and the pen move to produce the desired drawings. Several pens with ink of different colours can be mounted on the carriage for multicolour drawings. Since each pen is program selectable, a multicoloured drawing can be produced.
Microgrip plotter:
Such plotter don't use drums. The paper or any other medium is held(gripped) on both sides at the age y pinch wheels which give back and forth paper movement. With such plotters high performance is attained at a low cost.
Flat-Bed plotters:
Some plotters employ ink-jets in place of ink pens. The paper is placed on a drum and the ink-jets with different-coloured ink are mounted on a carriage. Such plotters are capable of producing multicolour large drawings.
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