Printer is a hardware output device used to produce a hard copy on the text or image oriented document. Printers are available colored or black & white. Printer resolution has improved greatly over the years as costs have continued to fall down. Among the printer types available are the daisy wheel, the location actual printing mechanism is similar to the IBM electric typewriter with its ball and wheel paper striking device; the dot matrix; a lot of it jet; the laser printer, designed for prime resolution, the high-speed line printer generates low quality output; the LCD and LED, both high quality devices and the thermal printer regarding example might be found with older copy or fax machines. Some printers, such as the line and daisy wheel, are prepared for producing text-only information. Hewlett Packard, Cannon, and Epson are one of the many companies manufacturing low-cost, high-speed quality printers capable of many functions.
A printer produces output in text as well as graphics on a paper. Before engaging in details about the kinds of printers, one must has an associated with the print quality, an important feature of hard copy devices.
Typeset Quality: These types of prints are mostly being used in gossip columns or text books in the form of letters and characters fully formed, using solid lines.
Near-typeset Quality: this print is similar in quality to the produced by a type-set machine, for instance print found in magazines.
Letter Quality: this print is made using fully formed characters, as opposed to characters made up of series of strains.
Near-letter Quality: the best way printing mode by head passing about the same line multiple cases.
Standard Quality: could be produced when characters composed of dots or lines are formed by one single pass of paper head.
Draft Quality: the characters are formed with a minimum number of dots or lines so are smaller than basic quality characters.
These printers produce prints by hammering or pin striking on the ink ribbon, which leaves an impression for this print on the paper. These printers are also divided into;
The mechanism of there printers are exactly like ordinary typewriters. Chance of these printers is measured in characters per second (CPS). These printers are;
1. Daisy Wheel Printers
These printers are accustomed to get the quality of type on typewriters. The daisy printers are so called because the print mechanism looks like a daisy. These printers give letter quality print but are slow typically 25-55 characters per other.
2. Dot -Matrix Printers
These printers use heads containing nine to twenty four pins. These pins produce patterns of dots on the paper to form the individual characters. The printing cost of them printers is less than others furthermore typically print as fast as possible of 100-600 characters per second. These printers can give draft quality, standard quality and near-letter quality prints.
These printers possess a special mechanism that prints a whole line at shortly after. These printers can typically print in the plethora of 400 letters per minute (LPM) to 8000 letters per minute (LPM). They are 132 column printers, having 132 printing heads. These printers can be of following types;
1. Drum Printers
These printers have a total character set engraved around the circumference of print position of the drum. Large amount of print positions across the drum equals the quantity of characters in a line entirely on an internetsite. One complete round is required to print a whole line.
2. Chain Printers
Chain printers use a series of print characters wrapped around two pulleys. Cherish the drum printer, a chain printer has one hammer for each print employment. The chain rotates until all for this required print positions at risk have been filled. Then, the page moves up to print the other line.
Band printers operate exactly the same as chain printers. However, they make use of a steel band instead for a chain and have fewer hammers. 'impact photo printers. These printers are categorized into subsequent kinds dependant on they technology they invest in.
4. Ink-jet Printers
These printers have tiny nozzles that spray charged ink dirt. These particles are passed through an electric powered field that arranges the charged ink droplets into characters. A lot of it is made available to the paper and dries instantly. These printers produce quality output at the of 300 characters per second.
These printers use heat to transfer ink in some recoverable format. Thermal printers produce near letter quality patterns. They bond ink onto the paper by heating pins that press against a special wax-inked bows. Thermal wax printers produce color images by melting color wax onto dollar. These printers are twice as fast as ink-jet printers so are used for animation and graphic arts applications. Some thermal printers use special heat sensitive paper, which turned black at the places where the hot pins strike. Fax machine is the example of these type of thermal unit.
6. Dye-Diffusion Printers
Dye-diffusion printers produce the photos by heating the ribbon to vaporize the dye and diffusion paper. Are generally expensive, and used for photography for quality imagery. They can produce millions of different color colors.
7. Electrostatic Printer
These printers are fast, high-resolution printers, used where complex images are that are required. Such as mapping integrated circuit design, satellite imaging, and remote sensing. These printers are definitely expensive.
8. Laser Printers
Laser printers are used where the best output will be the main bill. These printers produce high-quality text and graphics. For you to produce a print, a laser beam is presented to a mirror that bounces the beam onto a drum, leaving negative charge on the drum. Then, positively charged toner (ink) sticks into the drum. The drum rolls on the paper, the ink is in order to the stock.
Rashid javed writes articles about computer basics such as concept of connectivity and basics of computer