Most dot-matrix printers offer different speeds depending on the quality of print desired.People in daily life often encounters a lot of paper bills, and even some friends joked that "there are more receipts in the hand than banknotes!" And do you find that Even both are receipts, But types are very different: one kind of small receipt is plain paper, and the other kind of ticket is more smooth. Speed : Given in characters per second (cps), the speed can vary from about 50 to over 500 cps. Dot-matrix printers are two important characteristics :
Ink invades the guide plate of the print head, causing grit to adhere to it this grit slowly causes the channels in the guide plate to wear from circles into ovals or slots, providing less and less accurate guidance to the printing wires.
These machines can be highly durable, but eventually wear out. Most dot matrix printers have a single vertical line of dot making equipment on their print heads others have a few interleaved rows in order to improve dot density.
The moving portion of the printer is called the print head, and when running the printer as a generic text device it generally prints one line of text at a time. Facing the ribbon and the paper is a small guide plate pierced with holes to serve as guides for the pins. 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 (pawls). Unlike a typewriter or daisy wheel printer, letters are drawn out of a dot matrix, and thus, varied fonts and arbitrary graphics can be produced.īecause the printing involves mechanical pressure, these printers can create carbon copies and carbon less copies. A Dot Matrix Printer or Impact Matrix Printer refers to a type of computer printer with a print head that runs back and forth on the page and prints by impact, striking an ink-soaked cloth ribbon against the paper, much like a typewriter.
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