Printer and it's types

Printer and its types.... Their working and the functionality of each printer.... how they work and what is the process by which the printer prints the data on the paper/sheet

1. A presentation on “PRINTERS” By Ankit Chauhan(204903)

2. PRINTER A  printer  is a peripheral machine which makes a persistent representation of graphics or text, usually on paper. A printer is a peripheral device which makes a representation of an electronic document on physical media.  The different types of printers include 3D printer, inkjet printer, laser printer, thermal printer, etc.

3. Printer Non-Impact Printer Impact Printer Inkjet Dot-Matrix Daisy Wheel Laser Thermal

4. “Impact Printer” These printers have a mechanism that touches the paper to create an image. These printers work by banging a print head containing a number of metal pins which strike an inked ribbon placed between the print head and the paper . Impact printers produces heavy noise.

5. “Non-Impact Printer” The printers that prints on paper without striking the paper are known as non-impact printers. They does not work by applying force. Non-impact printers include laser printers and ink-jet printers. Non Impact printers are less quieter. Non-Impact can print up to 24 pages per minute.

6. Impact VS Non-Impact Printer Impact printers functions by applying force, where non impact printers does not do so. Non-Impact printers prints without touching the paper, where impact printers does not do so . Non-Impact printers are faster and produce high quality output than impact printers. Non-Impact produce almost no noise during printing where impact printers produce loud noise while printing . Non-Impact printers print more pages per minutes

7. “Dot-Matrix Printer” The term dot matrix refers to the process of placing dots to form an image. Its speed is usually 30 to 550 characters per second. This is the cheapest and the most noisy printer and has a low print quality. Dot- Matrix were 1st introduced by centronics in 1970.

8. Output of Dot-Matrix

9. “Daisy Wheel Printer” A daisy wheel printer is basically an impact printer consisting of a wheel and attached extensions on which molded metal characters are mounted. A daisy wheel printer produces letter quality print and it can’t produce graphics output.

10. Output of D aisy Wheel

11. How Daisy Wheel works? In a daisy wheel printer, a hammer presses the wheel against a ribbon which in turn makes an ink stain on the paper in the form of a character mounted on the wheel extensions . These printers are very noisy as there occur great movement during the printing. Its printing speed is also very slow, less than 90 characters per second (cps).

12. “Inkjet Printer” Inkjet printing  is a type of  computer printing  that recreates a  digital image  by propelling droplets of ink onto paper and plastic substrates . Inkjet technology was developed in the 1960s, but first commercialized by IBM in 1976. Ink-jet printer is type of non-impact printer. It creates output on paper by spraying tiny drops of liquid ink. Inkjet printer has print-head that can spray very fine drops of ink.

13. How Inkjet Printer works? Print head having four ink cartridges moves . Software instructs where to apply dots of ink, which color and what quantity to use. Electrical pulses are sent to the resistors behind each nozzle. Vapor bubbles of ink are formed by resistors and the ink is forced to the paper through nozzles. A matrix of dots called print head forms characters and pictures.

14. In the inkjet printing mechanism, the print head has several tiny nozzles, also called jets. As the paper moves past the print head, the nozzles spray ink onto it, forming the characters and images. An inkjet printer can produce from 100 to several hundred pages, depending on the nature of the hard copy, before the ink cartridges must be replaced. There is usually one black ink cartridge and one so-called color cartridge containing ink in primary pigments (cyan, magenta, and yellow). Some inkjet printers use a single cartridge with cyan, magenta, yellow, and black ink. A few models require separate cartridges for each primary pigment, along with a black ink cartridge.

15. Functioning of Inkjet Printer

16. “Thermal Printer” It generates images by pushing electrically heated pins against heat-sensitive paper. Prints by using heat. Commonly used for printing labels and barcodes. It is of three types:- Basic thermal printer Thermal wax transfer Thermal dye transfer

17. Basic Thermal Printer Inexpensive Image quality is low. Images tend to fade overtime. Receipts receives from ATM, petrol pump, etc. Thermal wax transfer printer Melts a wax-based ink onto special paper in tiny dots. Thermal dye transfer printer Heats ribbon containing dye and then diffuses the dye onto specially coated paper. High print quality. Can print as much faster then inkjet and laser printer.

18. “Laser Printer” A machine that produces very good quality printed material from a computer by using a controlled ray of very powerful light. Laser printer comes in different sizes. Provides the highest quality print. More expansive than Inkjet printer.

19. How a laser printer works They work by using a heated wire to positively charge a drum, which is then passed over by a laser that reverses the charge in the areas that it hits. The now-negatively charged areas of the drum represents the image or text that is to be printed. A toner roller is passed over the drum, and toner particles stick to the negatively charged areas. A sheet of paper is then fed underneath the toner-coated drum and the toner is passed onto its surface, creating a printer copy of a digital document or image.

20. Working of Laser printer

21. Comparison between Impact and Non-Impact printer Impact Printer Non-Impact Printer Use striking mechanism for printing. Use ink for printing. Make noise during printing. Silent Printers. Slow in working. Fast in working. Low quality printing. High quality printing. Cheap or inexpensive. Expensive. Examples :- 1) Dot Matrix 2) Daisy Wheel Examples :- 1) Inkjet 2) Thermal

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