producing a high quality print. A standard Inkjet printer has a resolution of dpi. Newer models have further improved dpi. Inkjet printers were introduced in the. Unlike other types of printers, inkjet can print on a wide variety of media. to prepare a document for printing is to convert it into PDF format. “A printer is an external output device that takes data from a computer and generates output in the form of graphics / text on a paper”. There are two types of .
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Daisy-wheel and dot-matrix are two prominent types of impact printers. Daisy- Wheel Printers. • Daisy-wheel printers. – Print data in a single font and only in one. Describe the types of printers currently available. ▫ Describe the installation and configuration process for printers. ▫ Describe the types of scanners. Ink-jet: A type of printer that works by spraying ionized ink at a sheet of paper. . PDF. Other things to look for when downloading a printer. Page or Continous Form.
This mechanism is known as electro-mechanical mechanism. They are of two types.
Character Printer: It prints only one character at a time. It has relatively slower speed. Of them are Dot matrix printer s. Dot Matrix Printer: It prints characters as combination of dots. Dot matrix printers are the most popular among serial printers. These have a matrix of pins on the print head of the printer which form the character. The computer memory sends one character at a time to be printed by the printer.
The words get printed on the paper when the pin strikes the carbon. There are generally 24 pins. Laser Printer is a type of printer that utilizes a laser beam to produce an image on a drum. The light of the laser alters the electrical charge on the drum wherever it hits.
The drum is then rolled through a reservoir of toner, which is picked up by the charged portions of the drum. Finally, the toner is transferred to the paper through a combination of heat and pressure.
This is also the way copy machines work. Because an entire page is transmitted to a drum before the toner is applied, laser printers are sometimes called page printers.
There are two other types of page printers that fall under the category of laser printers even though they do not use lasers at all. Once the drum is charged, however, they both operate like a real laser printer. One of the chief characteristics of laser printers is their resolution — how many dots per inch dpi they lay down. The available resolutions range from dpi at the low end to 1, dpi at the high end.
In addition to text, laser printers are very adept at printing graphics, so you need significant amounts of memory in the printer to print high-resolution graphics. The rapid update of internet email through the s and into the s has largely displaced the need for printing as a means of moving documents, and a wide variety of reliable storage systems means that a "physical backup" is of little benefit today.
Even the desire for printed output for "offline reading" while on mass transit or aircraft has been displaced by e-book readers and tablet computers. Today, traditional printers are being used more for special purposes, like printing photographs or artwork, and are no longer a must-have peripheral. Starting around , 3D printing became an area of intense interest, allowing the creation of physical objects with the same sort of effort as an early laser printer required to produce a brochure.
These devices are in their earliest stages of development and have not yet become commonplace. Types of printers[ edit ] Personal printers are primarily designed to support individual users, and may be connected to only a single computer.
These printers are designed for low-volume, short-turnaround print jobs , requiring minimal setup time to produce a hard copy of a given document. However, they are generally slow devices ranging from 6 to around 25 pages per minute ppm , and the cost per page is relatively high. However, this is offset by the on-demand convenience. Some printers can print documents stored on memory cards or from digital cameras and scanners.
In addition to text, laser printers are very adept at printing graphics. However, you need significant amounts of memory in the printer to print high-resolution graphics. To print a full-page graphic at dpi, for example, you need at least 1 MB megabyte of printer RAM.
Because laser printers are no impact printers, they are much quieter than dot matrix. They are also relatively fast, although not as fast as some dot-matrix printers. The speed of laser printers ranges from about 4 to 20 pages of text per minute ppm.
A typical rate of 6 ppm is equivalent to about 40 characters per second cps. Laser printers are controlled through page description languages PDL's.
There are two de facto standards for PDL's: There are several versions of PCL, so a printer may be compatible with one but not another. In addition, many printers that claim compatibility cannot accept HP font cartridges. This is the de facto standard for Apple Macintosh printers and for all desktop publishing systems. Most software can print using either of this PDL's. PostScript tends to be a bit more expensive, but it has some features that PCL lacks and it is the standard for desktop publishing.
The 6 steps laser printing process. Conditioning or Charging — To make the drum receptive to new images, it must be charged. The EP drum is given a negative charge by the primary corona wire around and volts. Writing - A laser beam is use to write to the EP drum causing dots on the drum to lose some of the negative charge and become relatively positive charge.
Developing - A toner is transferred from the toner cylinder to the EP drum by attracting the area of the drum that has a Relative positive charge.
Transferring - The transfer corona wire puts a highly positive charge on the paper once the paper has a positive charge the negatively charge toner particle leaps from the drum into the paper. Fusing - The compression roller and fusing roller press and melts the toner into the paper the fuser gets very hot.
Cleaning — The Photosensitive drum is cleaned before it can take on a new image Other Types of Printers. Photo Printer — Is a type of printer use for printing photographs. Dye-Sublimation Printer — Is a type of printer which employs a printing process that uses heat to transfer dye to a medium such as a plastic card, printer paper or poster paper.
Thermal Printer- Is a type of printer that produces a printed image by selectively heating coated thermo chromic paper, or thermal paper as it is commonly known, when the paper passes over the thermal print head.
The coating turns black in the areas where it is heated which then produce an image. All-in-One Printer - A printer than can also do scanning, fax and make copies. Plotter - A large device use to print large posters and documents. Other things to look for when downloading a printer. Page or Continous Form. Line or Page Printing. Full Duplex Printing.
Memory or Spooler. IEEE standard supported the following: Printer Connections Network, or commonly Ethernet, connections are commonplace on network laser printers, though some other types of printers do employ this type of connection.
RJ45 Parallel is the original standard for printers and a lot of basic printers still rely on the parallel port connection.