A printer is any unit that prints text or illustrations on paper. There are plenty of types of printers. In terms of the technology utilized, printers end up in the following groups:
- daisy-wheel: like a ball-head typewriter, this kind of printer has a plastic or steel wheel upon which the shape of each personality sticks out in relief. A hammer presses the wheel against a ribbon, which makes an ink stain by means of the character in the paper.Daisy-wheel printers produce letter-quality printing but cannot print photos.
- dot-matrix: Creates figures by striking pins against an ink ribbon. Each pin makes a dot, and combinations of dots form characters and illustrations.
- ink-jet: Sprays ink at a sheet of paper. Ink-jet printers produce top-quality text and photos.
- laser: makes use of the exact same technology as copy devices. Laser printers produce very high quality text and images.
- LCD :Similar to a laser printer, but uses liquid crystals or light-emitting diodes instead of a laser to produce a picture on drum.
- line printer: Contains a string of characters or pins that print a whole line in the past. Range printers are very fast, but produce low-quality print.
- thermal printer: a cheap printer that works well by pushing heated pins against heat-sensitive report. Thermal printers are popular in calculators and fax machines.
Printers may also be classified because of the after faculties:
- top-notch type: The result produced by printers is considered either letter quality (as effective as a typewriter), almost letter high quality, or draft high quality. Just daisy-wheel, ink-jet, and laser printers create letter-quality type. Some dot-matrix printers claim letter-quality printing, but if you appear closely, you can see the difference.
- speed: Measured in characters per second (cps) or pages per minute (ppm), the rate of printers varies commonly. Daisy-wheel printers are the slowest, printing about 30 cps. Line printers are fastest (up to 3, 000 lines each minute). Dot-matrix printers can print up to 500 cps, and laser printers are priced between about 4 to 20 text pages each minute.
- effect or non-impact: effect printers include all printers that really work by striking an ink ribbon. Daisy-wheel, dot-matrix, and range printers tend to be impact printers. Non-impact printers consist of laser printers and ink-jet printers. The significant difference between influence and non-impact printers is impact printers are a lot noisier.
- photos:Some printers (daisy-wheel and range printers) can print just text. Various other printers can print both text and layouts.
- fonts : Some printers, particularly dot-matrix printers, tend to be limited by one or several fonts. On the other hand, laser and ink-jet printers can handle printing an almost endless number of fonts. Daisy-wheel printers may also print different fonts, but you have to replace the daisy wheel, making it hard to combine fonts in the same document.