Printer

PRINTER

PRINTER is a device that accepts text and graphic output from a computer and transfer information to paper.printer vary in size,speed,sophicated and cost.It is a output device.It generally connect through power plug-in.

THE PRINTER QUALITIES ARE:

Color: Color is important for users who need to print pages for presentations or maps and other pages where color is part of the information. Color printers can also be set to print only in black-and-white. some printers are more expensive to operate since they use two ink cartridges (one color and one black ink) that need to be replaced after a certain number of pages. Users who don’t have a specific need for color and who print a lot of pages will find a black-and-white printer cheaper to operate.

Resolution: Printer resolution is usually measured in dots per inch ( dpi ). Most inexpensive printers provide sufficient resolution for most purposes at 600 dpi.

Speed: The speed of the printer becomes important. Inexpensive printers print only about 3 to 6 sheets per minute. Color printing is slower. More expensive printers are much faster.

Memory: Most printers come with a small amount of memory (for example, 1 mb) that can be expanded by the user. Having more than the minimum amount of memory is helpful and faster when printing out pages with large images or tables with lines around them.



Printers Languages

Printers languages are commands from the computer to the printers to tell the printer how to format the document being printed. These commands manage font size, graphics, compression of data sent to the printer, color etc.

TWO MOST POPULAR PRINTER LANGUAGES ARE :

Postscript and Printer Control Language.

Postscript is a printer language that uses English phrases and programmatic constructions to describe the appearance of a printed page to the printers. It introduced new features such as outline font s and vector graphics . Printers now come from the factory with or can be loaded with Postscript support.

Postscript is not restricted to printers and It can be used with any device. Devices that creates an image using dots such as screen displays, slide recorders, and image setters.

SOME COMMON THINGS SHOULD KEEP IN MIND DURING PRINTING:

If there are no lights or no display on the front of the printers. And if printer is not getting electricity or power. Then Check to make sure the power cord is plugged in .

ü The computer and the printer must be communicating before the printer will print. When you send a document to print, does a small printer appear on the Windows taskbar.

If the printers has paper in the paper tray, the paper may be jammed . Then Take the paper out of the paper tray. Also check to see that the top piece of paper is not crinkled or bent.