What is the difference between 9 pin and 24 pin dot matrix printers?
Actually they would use the same cable. A 9 pin print head has 9 pins in a vertical line, each with a solenoid to propel it against the ribbon, making contact and leaving a dot of ink on the paper. A 24 pin print head has, you guessed it, 24 pins. They are smaller in diameter, and in a staggered pattern rather than vertical. This allows for greater print density an a smoother looking printed character.
