Presentation on Printers

Topic: Dot Matrix printerPresentation by Bilal Sardar

INTRODUCTION

• The Dot-matrix printer is one of the earliest printers, they were available since the pc’s.

• This printer has print head that runs back and forth, or in an up and down motion, on the page .

• The printers were used in early 70s n 80s.• It prints by impact, striking an ink-soaked cloth

ribbon against the paper, much like the print mechanism on a typewriter.

• The dot matrix printer is also called Impact printer

Example of Dot Matrix printers

Working Mechanism

• Each dot is produced by a tiny metal rod, also called a "wire" or "pin", which is driven forward by the power of a tiny electromagnet or solenoid, either directly or through small levers.

• These tiny pins were strike against the ribbon which was soaked in ink.

• The number of the pins detemined the quality of printing . The most common types are 9 pin and 24 pin.

• More the pins the greater the quality.

Graphical representation.

The pin connected to the spring and behind it there is a electro magnet connected with the circuit. The paper is placed after the ribbon and when the circuit is closed and then opened then a hammering effect is produced which cause the pin to strike on the ribbon and then emboss the print on to the paper.

Printing Examples

Other types of Impact printers

• Daisy Wheel Printer

• It consisit of a wheel type structure and works on the same principle as of dot matrix.

• More of the impact printers are there but here only the most common were displayed!

Other types of Impact printers

• Band printer• In this type of printer theRequired characters placed inThe chains which is then srike’dWith the head, same principleAs that of dot-matrix.

Dot matrix printer issues

ConclusionThe use of dot matrix in disappearing day by day.It has been limited to small commercial space machines such as a shop cash register in which a receipt is printed with a impact printer on the paper enrolled on a drum, the other use is the credit card swipe machine!

The More commercial use or a personnel use is now nearly extinct although many small organizations seems to be using such technology today as well such as low grade schools! The future of impact printers is dark, the only place which I see where such printers are to be seen next is the science and technology museum.

Thank

you