A friend went to the market to buy a printer and walked into an Epson store. Epson staff explained that the Epson machine uses micro piezoelectric printing technology-good print quality. Turned into the HP store, HP staff highly recommended HP bubble technology-fast printing speed. My friend was confused for a while. Which one of the two different technologies is more cost-effective? Although I heard people talk about micro piezoelectric printing technology and bubble technology before, I have heard that they have their own advantages and disadvantages, but I have never really compared which one is better. If you choose the micro piezoelectric printing technology, will you lose the advantage of fast printing speed? If you choose bubble technology, then the quality of the print is not as good as micro piezoelectric printing technology? If you want to kill two birds with one stone-both print quality and speed, is it okay? In the case of the author's friends, I believe most consumers have encountered it before and have been confused. In the end, the author's friends finally bought a satisfactory printer after the author's review. You want to know which one the author's friend chose, so please read on.
1. On the ranking of seniority
If we talk about seniority, bubble jet technology was born 15 years earlier than micro piezoelectric printing technology. On one day in July 1977, when Ichiro Endo in the 22nd research room of the Canon Product Technology Institute in Meguro-ku, Tokyo, while conducting experiments in the laboratory, he accidentally placed a heated soldering iron on the attachment of the injection needle. The ink flew out quickly. Inspired by this, bubble inkjet technology was invented two years later. At the same time, Hewlett-Packard also invented the same technology, and began the history of inkjet printers.
The micro-piezo printing technology was born in 1994, which is more than a decade later than the bubble jet technology, but the micro-piezo printing technology is the real "brother" to be truly traced. Because as early as the 1970s, Epson began the research of piezoelectric technology. After nearly 20 years, finally in 1994, it successfully applied micro piezoelectric printing technology to the field of printers and realized productization. Both have been struggling to develop during these 15 years, but in terms of market acceptance, bubble jet technology still takes the lead in time. It has penetrated into the hearts of the people 15 years earlier than micro piezoelectric technology.
2. Anatomy of printing technology
1. Working principle
The working principle of the micro piezoelectric inkjet printing technology is completely different from the thermal bubble type. It places many small piezoelectric ceramics near the nozzle of the printhead of the inkjet printer, and it will deform and oscillate under the action of voltage. The principle of voltage is applied to it in time. The piezoelectric ceramic then expands and contracts so that the ink in the nozzle is ejected, forming a pattern on the surface of the output medium.
The working principle of bubble inkjet printing technology is to install the ink into a very tiny capillary tube, and then quickly heat the ink to the boiling point through a tiny heating pad to form a very tiny steam bubble. The expansion of the steam bubble will eject a drop of ink To the top of the capillary. Stop heating, the ink cools, the steam condenses and shrinks, and the ink stops flowing until the next time a steam bubble is generated, and so on.
2. Comparison of nozzles
The micro-voltage control technology adopted by Epson is characterized by the high printing resolution that can be easily achieved. With the unique ink process, a perfect photo printing effect can be obtained. The disadvantage is that the print head is too precise, and it is easy to malfunction when used improperly. Once the print head is blocked during use, the cost of dredge or replacement is relatively high, and it is not easy to handle. If the whole printer is not good, it may be scrapped. In addition, the cost of inkjet print heads made by micro piezoelectric inkjet technology is relatively high, so in order to reduce the user's cost, the print head and ink cartridge are generally made into a separate structure to reuse the head, and the ink does not need to be replaced when replacing the ink Print Head.
HP uses bubble inkjet printing technology, which is characterized by relatively mature technology, low production cost of nozzles, and the integrated design of nozzle ink cartridges. The most direct benefit for DIYs is the ease of adding ink, but this technology Decided that its print resolution (dpi) cannot be very high. However, the ink cartridge used in the bubble inkjet printing technology is the integration of the print head and the ink cartridge. The number of integrated nozzles on the nozzle is much more than the nozzles on the nozzle of the micro voltage control technology. The number of nozzles is arranged more, and the width of each line of printing is wider. , Of course, the time to complete a page of content will be short. Therefore, the same bubble inkjet printing technology is faster than the micro-voltage control technology in printing speed.
3. Ink drop comparison
Before discussing the two technologies, we need to know what makes the inkjet printer output beautiful photos and pictures? How is the difference in print quality between different models caused? To explore these issues, it is necessary to talk about the technology of the nozzle, the core of the inkjet printer, and the process of forming each ink droplet. Printing accuracy has always been a technical indicator that users are concerned about, and manufacturers are also focusing on this aspect. To effectively increase the value of dpi, the premise must have a sufficiently small ink dot, that is, a sufficiently small ink droplet volume. Only when the ink droplets are small enough can high printing accuracy be achieved and can it play a role in improving the final printing quality.
Reducing the volume of ink droplets, accurately controlling the position and dot shape of ink droplets on paper, and reducing the splashing of ink droplets have become an important technical problem that inkjet printer manufacturers have overcome in improving print quality. Piezoelectric nozzle technology controls the piezoelectric device through electric pulse signals to form the corresponding pressure on the ink, so that the corresponding volume of ink droplets are ejected from the nozzle. Compared with the bubble nozzle technology, due to the use of more accurate and high-speed electrical pulse signals for control, the volume of ink droplets is more accurately controlled, and the ejected ink dots are very round, which will form a splash, and at the same time make the direction of ink droplet ejection stable , The position of ink dots on paper is more accurate. Many models of Epson have reached a minimum droplet volume of 4 picoliters, 3 picoliters (Epson ME2), 2 picoliters (Canon i950), and individual models have reached a record 1.5 microliters (Epson Stylus Photo R800). In terms of ink droplet control, the micro piezoelectric method also has some inherent special advantages.
4. Ink comparison
Since no heating is required during inkjet, the ink will not undergo chemical changes, and the requirements for the ink composition are not very high, but its production cost is relatively high, and it will be more expensive than the bubble technology. The disadvantage of the bubble technology is that the ink will be heated during use, and the ink is prone to chemical changes and unstable properties at high temperatures, so the authenticity of the color produced will be affected to a certain extent; on the other hand, because the ink passes through the bubble The directionality and volume of the ink particles are very difficult to control. The edges of the printed lines are easy to be uneven, which affects the print quality to a certain extent. Although the cost of nozzles made by thermal inkjet technology is relatively low, the electrodes in the nozzles are subject to electrolysis and corrosion, so they generally do not have a long service life. In addition, due to the chemical change of the ink due to heating, because the ink contains a lot of harmful ions, when a chemical reaction occurs, agglomerated substances will be generated, which will affect the health of the user for a long time.
3. Analysis of printing cost
Printing cost is a problem that users are more concerned about. The cost mainly comes from the consumption of consumables. The consumables of inkjet printers mainly include paper and ink cartridges. In terms of paper, the price of the printing media required to buy printers of various brands is not much different. The ink cartridge is the eternal pain in the user's heart. As long as the printer is used, the consumption of the ink cartridge is inevitable.
Printers using bubble technology usually have the print head and ink cartridge integrated together, commonly known as "head-water integration", while printers using micro piezoelectric printing technology usually have the print head and ink cartridge separated, commonly known as "head-water separation". The difference between the two printing technologies also brings about fundamentally different printing costs.
First of all, because of the "head-to-water integration" method of inkjet printers using bubble printing technology, each ink cartridge includes a new print head, so each of its ink cartridges is relatively expensive. The inkjet printer using micro piezoelectric printing technology uses "head water separation", so that when replacing the ink cartridge, there is no need to replace the print head. A print head can be used for a long time until the print head is damaged, so the cost of a single ink cartridge is lower .
Secondly, the two printing technologies "bubble" and "micropiezo", in addition to the above-mentioned different connection methods of the print head and the ink cartridge, at the same time, different ink dispensing methods are adopted, which also reflects the two Different ways. The inkjet printer of micro piezoelectric printing technology represented by Epson is usually divided into different colors, so that each drop of ink of each color can be fully utilized, which is more economical and practical. The inkjet printers with bubble printing technology represented by Hewlett-Packard use multiple colors of ink in a mixed manner, which is a waste because when one of the colors is used up, although all other colors are not used up, all replace.
Finally, printers that use "head-water separation" may cause nozzle clogging due to friction with paper and dryness of ink volatilization after a long period of use. Once blocked, the printed content will appear white lines, broken lines and colors Not allowed. As the use time of the print head increases, the more serious these phenomena are, the more opportunities there will be. The solution is to clean, use a lot of ink to flush the blocked nozzles away, wasting a lot of precious ink. When the number of nozzles that cannot be recovered reaches a certain amount, the print head must be replaced. In this regard, printers that use "head-water integration" will basically not appear, because the printer is newly purchased with the ink cartridge, each print head only needs to complete the print volume of one ink cartridge, the time and print volume are both a bit less.
In addition, the above only analyzes the cost of a single ink cartridge. In fact, the long-term cost of a printer using micro-piezo printing technology "head water separation" is higher than the inkjet printer using bubble printing technology "head water integration". Experiments show that inkjet printers that use "head-water separation" usually have a certain degree of clogging and damage when each printhead completes the printing task of 4 to 5 ink cartridges. The printhead of this printer It is usually much more expensive than "head is not integrated" (for example, a print head of Epson usually needs more than 300 yuan), and once replaced, it is equivalent to about half the price of the entire printer. At the same time, the replacement of this kind of print head usually requires a special maintenance master, and also needs to pay a certain maintenance cost, so that the cost allocated to each ink cartridge is actually higher than the "head water integrated" ink cartridge.
After comparative analysis, my friend finally chose Epson ME2, because the friend belongs to a family user, usually prints less, but pays great attention to print quality. If you choose the "head water separation" jet of piezoelectric printing technology represented by Epson In addition to fine printing quality, ink printers can save printing costs. Because a print head can still be used for a long time, if the maintenance is good, the printer may not need to replace the print head for a lifetime, so the total printing cost will be much lower, and the printing speed of Epson ME2 is compared with that of ME1. To improve, choose ME2 is the ideal two birds with one stone. So for some enterprise users or users with large print volume, how to choose these two technologies? The author proposes to choose the inkjet printer with bubble printing technology “head and water integration†represented by HP. Because the print head is replaced when the ink cartridge type is replaced, on the one hand, the print quality can be ensured, and on the other hand, the print head is usually not clogged or damaged. The price of the print head is also much cheaper than that of the "head water separation" You can also get a brand new ink cartridge at the same time. For business users and home users who print a lot, isn't print speed the most important? Does the rapid printing speed of bubble printing technology meet the requirements?
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