Impact printers: Dot Matrix or Serial Printers

Dot Matrix or Serial Printers:

In a Dot Matrix printer, a print head is a collection of pins in 9×7 arrays. Values of all characters are stored in the printer buffer. When a character has to be printed, the printer sends the information to printer buffer. When the character head hits the paper, these pins are used to form a character. There is a carbon ribbon in between the print head and paper.  So, when the print head strikes an impression is produced in the paper.


  1. It prints one character at a time.
  2. Many fonts can be used.
  3. Characters are made by combining dots.
  4.  Poor printing speed and quality.

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