![]() There doesn’t seem to be a great deal of difference, but when you see the printed samples, there’s an obvious improvement in quality.Īlthough both kinds may offer options for character definition (usually by varying the horizontal spacing, defined as pitch), the 24-pin models are capable of printing finer detail and thus sharper images. A similar 24-pin printer has a resolution of 360 x 180. A 9-pin printer might be capable of 240 x 216 dots per inch, for example. Comparison with other types of printers doesn’t give a realistic view of print quality. Manufacturers often quote dots per inch (dpi), which can be confusing. Over their many years of development, print heads have had anywhere from 7 to 36 pins, though now there are just two choices: 9 pins or 24 pins, the latter in two slightly offset rows of 12. As the print head moves horizontally, it creates character shapes by pushing different combinations of pins forward into the ink ribbon and into contact with the paper. The print head of a dot matrix printer is composed of a number of pins (or wires), in a vertical row. Don’t expect to get high-resolution color images out of one. ![]() ![]() Dot matrix printers can be an efficient and cost-effective solution, but they’re quite function specific.
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