Modifications of printers for PC presentation. Printers. Advantages and disadvantages of laser printers
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A printer is a widespread device for outputting information onto paper; its name is derived from the English verb to print - to print.
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Printers differ primarily in the printing method. Printers can be divided by information output, i.e. by the type of their devices: matrix (needle) inkjet laser
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Matrix printer
The main advantages of dot matrix printers were: There was a cheaper price compared to other types of printers, which were previously practically unavailable. But now dot matrix printers are rarely used. The disadvantages of dot matrix printers are: Slow speed. One page of text was printed within a minute, and a page with a graphic design took up to 4 minutes; Loud printing noise
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Jet printer
The main advantages of inkjet printers are: fairly low cost; the ability to print color images and high-quality photo printing; high printing speed; relatively quiet operation; low power consumption. The disadvantages of inkjet printers include: the high cost of consumables (cartridges and special paper); vulnerability of copies printed on non-branded paper to light and water; the high cost of one copy is about 25-30 kopecks, excluding the cost of paper.
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Laser printer
The main advantages of laser printers: high speed; large volumes of printing; low noise level during operation; resistance of printed copies to the influence of water and light; low cost per copy - about five kopecks per sheet.. Disadvantages of laser printers: the cost of a laser printer is 2 - 5 times higher than the cost of other types of printers. The number of pages that can be printed by a printer in a given time (for example, a month) is limited. high cost of powder and paper.
- The operating principle of the printing mechanism.
- Maximum paper sheet size.
- Use of color printing.
- Print speeds.
- Matrix
- Jet
- Laser (page)
- Thermal
- printing speed and their versatility;
- ability to work with any paper;
- low cost of printing;
- equipped with internal memory; (buffer), which receives data from the PC (from 4 to 64 KB);
- Possibility of using paper on a roll.
- Graphics take a long time to print (because the character set is not read from the printer’s internal memory (ROM), and each printed dot must be calculated).
- Always accompanied by noise (since a dot matrix printer is a mechanical device.
- “Dry ink” technology. Operating principle: under the influence of high temperature, particles of solid dye (most often graphite acted as this) were melted and applied to paper under pressure.
- “Spark” technology: generally similar to the previous one, but uses liquid ink.
- Piezoelectric technology: uses the phenomenon of piezoelectricity to apply ink to paper (film), which allows for very precise positioning of the ink particles, but requires a complex and expensive printing device (cartridge).
- “Bubble” technology: applies dye by pushing ink particles out of the container using a gas bubble formed inside the cartridge as a result of a sharp local increase in temperature and pressure.
- printers are almost silent;
- easily carry out color printing;
- Prints obtained using inkjet printers have high resolution laser quality.
Most laser printer manufacturers use the same printing mechanism as copiers.
There are a number of other printing technologies, such as sublimation printing and thermal transfer printing, which are used much less frequently. Laser and LED technologies (in the latter case, instead of a laser and a mirror deflecting the laser beam, a line of LEDs is used) are in many cases indistinguishable from the point of view of the end user.
- High noise level;
- Expensive.
- inkjet transfer of molten dye (thermoplastic printing);
- contact transfer of molten dye (thermal wax printing);
- thermal dye transfer (sublimation printing).
“Devices for a computer” - Mouse. Table of contents. Monitor. Hardware. Monitor is an information output device. Internal. A modem is a device for connecting computers. 1) External 2) Internal. Next. 2) Tablet. Jet.
“Input devices” - (Peripheral devices). Webcam. Consists of a pen and a flat tablet that is sensitive to pressure or proximity of the pen. Microphone. Test questions: Outwardly it looks like a pencil connected by a wire to a computer. For middle-class mice, the resolution is 400 – 800 dpi. Input device. The operation of any hardware requires software control.
"Printers" - Laser. They have the properties to dry out and wear out. Thermoblock, stove, fuser - a unit in which toner is baked into paper. Network. Rubber roller, press roller - presses the paper against the heating roller. Laser printer components. Over time, they lose their properties and must be regularly replaced by a specialist. Developer, carrier, developer - the smallest metal particles that transfer toner to the photo roll.
“Digital camera” - Super-compact, miniature. Digital cameras. Digital camera. Basically, behind the guise of unchanged optics, loom the characteristics of mirrorless cameras. Reinvented in other devices. Characterized by small size and size. Cameras with built-in optics: Compact (“Compact mill” of traditional sizes).
“Monitors and their types” - Monitor. LCD - thin plates containing complex matrices so-called. liquid crystals. The most famous monitor manufacturers are Apple. ... History of Monitors. LG. Operating principle of LCD. Monitors are part of any computer system. 191(1). The inner surface of the screen is covered with phosphor. Types of monitors.
“Devices on the computer” - This method is called “mouse gestures”. The operation of touchpads is based on measuring the capacitance of the finger or measuring the capacitance between the sensors. The trackball can be thought of as a two-dimensional scroll wheel. Joystick. Induction mice. A trackball is a ball that rotates in any direction. Trackballs.
There are a total of 27 presentations in the topic
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The main structural elements of the toner compartment (Fig. 1.17.): 1 - Magnetic roller (Magnetic Developer Roller, Mag Roller, Developer Roller). It is a metal tube, inside of which there is a stationary magnetic core. The toner is attracted to the magnetic roller, which, before being supplied to the drum, acquires a negative charge under the influence of direct or alternating voltage. 2 - “Doctor” (Doctor Blade, Metering Blade). Provides uniform distribution of a thin layer of toner on the magnetic roller. Structurally, it is made in the form of a metal frame (stamping) with a flexible plate (blade) at the end. 3 - Mag Roller Sealing Blade. A thin plate similar in function to the Recovery Blade. Covers the area between the magnetic roller and the toner supply compartment. The Mag Roller Sealing Blade allows toner remaining on the magnetic roller to flow into the compartment, preventing toner from leaking backwards. 4 - Toner Reservoir. Inside it is the “working” toner, which will be transferred to the paper during the printing process. In addition, a toner activator (Toner Agitator Bar) is built into the hopper - a wire frame designed for mixing toner. The main structural elements of the toner compartment (Fig. 1.17.): 1 - Magnetic roller (Magnetic Developer Roller, Mag Roller, Developer Roller). It is a metal tube, inside of which there is a stationary magnetic core. The toner is attracted to the magnetic roller, which, before being supplied to the drum, acquires a negative charge under the influence of direct or alternating voltage. 2 - “Doctor” (Doctor Blade, Metering Blade). Provides uniform distribution of a thin layer of toner on the magnetic roller. Structurally, it is made in the form of a metal frame (stamping) with a flexible plate (blade) at the end. 3 - Mag Roller Sealing Blade. A thin plate similar in function to the Recovery Blade. Covers the area between the magnetic roller and the toner supply compartment. The Mag Roller Sealing Blade allows toner remaining on the magnetic roller to flow into the compartment, preventing toner from leaking backwards. 4 - Toner Reservoir. Inside it is the “working” toner, which will be transferred to the paper during the printing process. In addition, a toner activator (Toner Agitator Bar) is built into the hopper - a wire frame designed for mixing toner.
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5. Capacity for "working off". This is where “bad” toner is collected, that is, particles that have not transferred from the photo roller to the paper, dust, etc. If you disassemble an empty cartridge, container (1) will be empty, and container (5) will contain a noticeable amount of seductively black powder. But this is not toner, this is “working off”! If you pour this crap into the toner hopper (1) and insert such a miracle into the printer, then the printer... will print, but very poorly, dirty, and the further it goes, the worse, because most of the powder will get from the cartridge into the printer mechanism , which will very soon lead to the need for complete cleaning and prevention. Or it will completely disable it. 5. Capacity for "working off". This is where “bad” toner is collected, that is, particles that have not transferred from the photo roller to the paper, dust, etc. If you disassemble an empty cartridge, container (1) will be empty, and container (5) will contain a noticeable amount of seductively black powder. But this is not toner, this is “working off”! If you pour this crap into the toner hopper (1) and insert such a miracle into the printer, then the printer... will print, but very poorly, dirty, and the further it goes, the worse, because most of the powder will get from the cartridge into the printer mechanism , which will very soon lead to the need for complete cleaning and prevention. Or it will completely disable it. 6. Squeegee (knife, blade). With each revolution of the photo roller, it cleans off everything that has stuck to it and has not transferred to the paper. And all this crap ends up in bunker (5). Complete restoration of the cartridge involves replacing both the photo roller and the squeegee, but since... the squeegee is less susceptible to wear, sometimes only the drum is changed. (If the squeegee is well preserved and/or good print quality is no longer expected from the cartridge, this is acceptable.) Which, naturally, should cost less, because although the squeegee itself is not expensive, installing it and adjusting it is a much more time-consuming and precise job than replacing the drum.
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7. Device for fixing the image on paper (fuse, fuser, “stove”) This unit is located in the printer, not in the cartridge, but its “well-being” depends most of all on the quality of the toner. The upper shaft is hollow metal, covered with thin Teflon, and a tubular heating lamp is located along its axis. The lower shaft is covered with heat-resistant rubber. The paper passes between them, the hot Teflon layer melts the toner, and the image is fixed on the paper. For some reason, bad toner tends to stick to the Teflon, and not to the paper. Gradually, its layer grows, this is noticeable in the spots on the image, and in the future this leads to the destruction of the Teflon layer and the need to change the Teflon shaft. So never, ever print with bad toner! And if this happens, then run a dozen sheets of clean paper through the printer so that the dirt from the roller transfers to it at least partially and quickly switch to normal toner. Either all the dirt will go away gradually, or the drum will have to be cleaned mechanically. The process is delicate. 7. Device for fixing the image on paper (fuse, fuser, “stove”) This unit is located in the printer, not in the cartridge, but its “well-being” depends most of all on the quality of the toner. The upper shaft is hollow metal, covered with thin Teflon, and a tubular heating lamp is located along its axis. The lower shaft is covered with heat-resistant rubber. The paper passes between them, the hot Teflon layer melts the toner, and the image is fixed on the paper. For some reason, bad toner tends to stick to the Teflon, and not to the paper. Gradually, its layer grows, this is noticeable in the spots on the image, and in the future this leads to the destruction of the Teflon layer and the need to change the Teflon shaft. So never, ever print with bad toner! And if this happens, then run a dozen sheets of clean paper through the printer so that the dirt from the roller transfers to it at least partially and quickly switch to normal toner. Either all the dirt will go away gradually, or the drum will have to be cleaned mechanically. The process is delicate.
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A printer is a device that outputs encoded information from a computer in the form of printed copies of text or graphics. There are matrix, laser and inkjet printers for universal and special purposes.
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Dot Matrix Printer A dot matrix printer is a printer that uses a combination of small pins to print on an ink ribbon, leaving a character imprint on the paper. Each character printed on the printer is formed from a set of 9, 18 or 24 needles formed in a vertical column. Read more>>
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Inkjet An inkjet printer is a printer that generates characters in the form of a sequence of ink dots. The print head of an inkjet printer has micronozzles through which heated, quick-drying ink is sprayed onto the page. There are one-color, three-color and four-color inkjet printers. Read more>>
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Laser >> Laser printer is a printer that displays on paper an image of a page previously generated in the computer’s memory. Physically, a laser printer “melts” particles of ink powder (toner) into the paper. More details
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Which printer should you choose? Before purchasing a printer, you should immediately decide what type of printing you need. Inkjet printers are primarily used for light volume household color printing - they are best suited for printing. color photographs or illustrated documents. However, for large volumes of printing with significant ink consumption, they become unprofitable to use. Therefore, if you only need black and white printing in large volumes - from 150-200 sheets per month, you should opt for a laser printer. In the vast majority of other cases, an inkjet printer will work for you. If you have a writer and a photographer living under the same roof at home, it’s worth purchasing both devices - fortunately, their cost is currently not that high.
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Dot Matrix Printer Dot matrix printers are gradually falling out of use because they are very slow and noisy and produce poor quality copies. However, the cost of printing one copy on a dot matrix printer is low, and dot matrix printers allow you to make up to three copies simultaneously. Therefore, at present, dot matrix printers are most often used in conditions unfavorable for other printers, for example, in production, in those workplaces where a large amount of text information needs to be constantly printed. Prices for dot matrix printers are quite stable - they are not currently decreasing and, according to experts, are unlikely to decrease in the future.
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Inkjet Printer Inkjet printers are primarily used for light-volume household color printing - they are best suited for printing color photographs or illustrated documents. However, for large volumes of printing with significant ink consumption, they become unprofitable to use. Inkjet printers can print images of very high quality on special paper. Such printers for professional work with color images are called photo printers. Some can print images directly from a digital camera, and some models have a color LCD screen that allows you to preview the image before printing.
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Advantages and disadvantages of inkjet printers The main advantages are: fairly low cost; the ability to print color images and high-quality photo printing; high printing speed; relatively quiet operation; low power consumption. Also, some models of inkjet printers allow you to print not only on paper, but also on films, CDs, and fabrics. The disadvantages include: high cost of consumables (cartridges and special paper); vulnerability of copies printed on non-branded paper to light and water; the high cost of one copy is about 25-30 kopecks, excluding the cost of paper.
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Laser printer Entry-level laser printers allow you to produce only black and white copies, but of high quality and very quickly. Recently, laser printers have become increasingly popular, due to very good reasons: Prices for laser printers have dropped sharply. Color laser printing has become cheaper and of higher quality - with significant quantities of prints, laser printers quickly justify the money spent on their purchase. Extremely high quality prints, especially text and business graphics, printed using laser printers. Laser printers, compared to their counterparts of other types, are easier to maintain, more reliable and economical. For example, one refill of a laser printer cartridge allows you to print from 2.5 to 10 thousand copies, and the average monthly resource of its drum, depending on the model, ranges from 10 to 60 thousand prints. Laser printers print quickly and quietly, which is very important for office work.
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Advantages and disadvantages of laser printers Main advantages: high speed; large volumes of printing; low noise level during operation; resistance of printed copies to the influence of water and light; low cost per copy - about five kopecks per sheet. Laser printers have achieved such significant advantages due to their qualitatively excellent operating principle. Disadvantages are: high price, low radiation.
