PRINTER

PRINTER

Printer is a hard output device. A printer produces output usually in the form of text, on paper. There are lots of different printers available in the market. The most commonly used types of printers are:-

1.Dot-Matrix Printers
2.Ink Jet Printers
3.Laser Printers




1. DOT-MATRIX PRINTER

               A type of Printer that Produces characters and illustrations by striking pins against an  link ribbon to print closely spaced dots in the appropriate shape. Dot-Matrix printers are relatively expensive and do not produce high-quality output. However, they can print to multi page form( that is, carbon copy) Something laser and inkjet printer cannot do.
It forms characters on a page according to a pattern set for each character. It is mostly, use in commercial environment for invoice and report printing, where quality and  speed are not important. They are cheap to run and to  maintain but do not produce high quality output. it gives an output by striking its head on to the paper through the ribbon cartridge.
Dot-Matrix printer very in two important characteristics:-

• Speed:- Given in character per second the speed can vary from about 50 to over 500 cps. Most dot-matrix printers offer different speeds depending on the quality of print desired.
• Print quality:- Determined by the number of pins (the  mechanisms  that print the dots), it can vary from 9 to 24. The best dot-matrix printers (24 pins) can produce near letter-quality type,although you can still see difference if  you look closely.In addition to these characteristics, you should also consider the noise factor. Compared to laser and ink-jet printers, dot-matrix printers are notorious for  making a racket.
  
  2. INK-JET PRINTER
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