How to test printhead material compatibility?

We all know that inkjet printheads can be divided into oily printheads, water-based printheads, and water-oil general-purpose printheads, depending on the ink used.

What kind of ink can be applied to a model of print head, not to mention that it is necessary to repeat a large number of test work in a controlled test environment for a long time to prove that the ink will not corrode or penetrate the inner cavity of the ink path of the print head. Material to ensure that the print head works properly during the expected life.

Taking the XAAR 1201 print head as an example, the ink path cavity is composed of five different materials. In the test, each material sample needs to be continuously immersed for 12 weeks in a fixed constant temperature and humidity environment, and the degree of corrosion and penetration of each material is recorded periodically to determine whether the ink can pass the test.

This type of test is called material compatibility testing and requires the use of a material compatibility test package from the original printhead. The test results are authoritative and representative. If you just fill the ink into the print head and hit the bubble, you can judge whether the ink is available. This is not a professional test behavior. The result is often the risk is passed on to the printer user.

If it is a desktop printer printhead for office use, the original design is to print daily documents, the amount of ink is not large, not often printed in large quantities, and must be used with the original ink, the printing effect is guaranteed. After such a print head is transplanted to a photo machine, various problems caused by changes in the use environment are unacceptable to many end users.

How can a UV printer printhead be maintained like a new one?

How can a UV printer printhead be maintained like a new one?

UV printer print head maintenance methods are available in four ways, including initial installation, routine maintenance, fault maintenance, and maintenance during the fake period:

After the equipment is installed, the equipment is initially installed to maintain the print head.
In order to get the print head into optimal operation, before the UV printer officially begins to undertake the production business, please be sure to print some pictures as much as possible in 1-2 days. The picture is best CMYK/LC/LM/W 7 colors. Used, and add color bars on both sides of the screen to ensure that 7 print heads are always in the inkjet state.

How to maintain the print head after the daily work is completed

In the off state
After all the print jobs are completed every day, in order to keep the print head in optimal working condition and to avoid clogging the nozzle due to UV ink evaporation, please follow the method below to maintain the device and let the device stay overnight.
1. Turn off the UV printer power supply.
2. Clean the non-woven fabric with a special cleaning solution, then pour the cleaning solution onto the non-woven fabric to make it wet.
3. Move the handpiece back to the rightmost cleaning station and tightly bond the nozzle to the nonwoven.
4. Keep this state for the device to stay overnight.

Power on
1. Turn off the UV lamp and draw the wind on the platform.
2, print the test strip, check whether the print head status is intact, if not in good condition, continue to maintain the print head until the print head is in good condition (no needle, no oblique spray)
3, do not turn off the computer and software, let the machine standby flash

After the nozzle was found to be slightly blocked, the treatment method was found.
1. Regularly maintain the print head (slightly wipe the print head surface with a non-woven fabric) until the print head is in good condition.
2, cleaning solution maintenance (squeeze the surface of the print head with a sponge stick to the cleaning solution for 1-2 minutes), then wipe the surface of the print head with a non-woven fabric, check the print head status diagram, and repeat the operation several times until printing The head status is normal.
3, combined with the cleaning solution maintenance method, increase the print head correction voltage 1-2V print 2 m * 1 m color block (print the print head state problem color color block) interval 2-3 times check the print head state map until the print head status normal.
4. Do not rinse the print head without authorization. If the print head is damaged, the consequences will be at your own risk!

After the equipment is installed, the equipment is initially installed to maintain the print head.
The UV printer is not used for a long time, and the printer's print head is easily blocked. Especially during the Spring Festival, the temperature is relatively low, and the ink is prone to deposits and impurities after being frozen. Ensure that the room temperature is between 20 ° C and 30 ° C. If the temperature is too low, it may cause serious damage.

Xaar Print Head Will Become The Mainstream Print Head of UV Flatbed Printer

The Xaar 1001 printhead has many patented design techniques that lead the development of digital inkjet decoration technology in many respects, especially the superior printing results produced by the use of ink droplets to optimize grayscale technology, which highlights its outstanding leadership.

Specifically, the Xaar 1001 printhead has the advantage of having ink drop optimization technology:
This technology enables the ejection of ink droplets of various sizes and sizes on the ceramic tile, which means that the size of the ink droplets can be varied. The variable ink droplet model has the following advantages:

1) The image is more HD and sharper
The high-naturalized nozzles per inch of the Xaar 1001 printhead produce sharp, sharp droplets with a smaller ink drop pattern, which results in sharper images and sharper images during the actual printing process. Printing ink droplets of different sizes is also known as grayscale or grayscale printing technology. The original inkjet device is binary. The ink droplets printed by the two-state printing are of no size. All of them are of one model. When the printhead is printed, it only prints or does not print. In terms of image forming, the intensity and lightness of the color is achieved by the amount of ink droplets. When the image is enlarged to a certain extent, the edge of the image will form a more pronounced zigzag shape, so for some images that are relatively more demanding. It is difficult to achieve a more perfect image effect. And when the ink droplets have a different size, it can make the image more perfect.

2) Produce a wider color gamut
Another feature based on ink drop optimization technology is the automatic drop model selector. This automatic drop model selector gives the tile a different glaze depending on the degree of absorption of the tile to create a wider tile. Color gamut.

3) Grayscale printing
The ability to print ink drops that can print different sizes is called "grayscale printing." As described earlier, grayscale printing can make the pattern more perfect. The realization of gray scale is to quickly eject the ink droplets one by one after precise calculation. These small ink droplets are quickly merged into new sizes according to different requirements after leaving the nozzle, so that the ink droplets reaching the tile surface are made. Different sizes have been produced, that is, grayscale printing has been achieved.

 Xaar 1001GS6 print head
In the Xaar1001GS6 printhead, each of the most basic normal printing single-shot processes can equally eject six ink droplets of the same size, and then the six drops of ink quickly merge into one drop as soon as they leave the nozzle. The most basic ink drop. When the gray level is achieved, there is one more injection process for each level, so the model of the ink drop is a multiple of 6. Then, the gray level of Xaar 1001GS6 is 0, 6, 12, 18, 24, 36, 42 ink droplets of several grades. Ink drop models are automatically selected as needed.

In fact, combining the highly natural resolution and grayscale methods, the Xaar 1001 printhead produces a resolution higher than 1000 microns, close to the human eye's recognition limit. In other words, a perfect presentation can be achieved within the normal line of sight. So, the Xaar100 1GS6 printhead can create stunning images and high-definition images.

Xaar 1001GS12 print head
According to the above analysis, the Xaar 1001GS12 printhead can eject a larger volume of ink from 12 to 84 volumes, and can spray more ink for a thicker tile color effect. As a better option, the Xaar 1001GS12 printhead produces the same ink coverage as the Xaar 1001GS6, but prints at twice the speed of the GS6.

The print quality of both printheads is much higher than that of the two-state printhead. The two-state printhead has been described above because it does not change the size of the ink droplets. However, the two models of the Sel 1001 can easily make tile manufacturers achieve excellent reproduction of natural materials such as marble and granite, as well as highly creative new designs.

Ink optimization technology
In order to achieve the high quality ceramic inks and special color effects that ceramic manufacturers want, ceramic ink manufacturers have created new inks for digital inkjet printing. To ensure that every drop of ink that is approved is ejected in the most ideal way, Xaar technology fine-tunes the way the printhead is ejected to form a data file for each type of ink. This is called: " The waveform optimization file is the waveform file. Xaar technology works closely with other components to produce a waveform of each drop, ensuring the accuracy of the drop position, optimum operating voltage, print confidence, and the most fundamental yield increase. Once successfully verified, digital ceramic inks will ensure long-term damage to the printhead, and the best waveform will produce unparalleled print results and double savings in operating costs.

This is not difficult to understand, because the basic physical and chemical properties of each type of ink are different, such as the viscosity, specific gravity of the ink, and so on. As mentioned above, the nozzle is a very precise and precise process when it is working, so that the tiny droplets are combined in the short time and short distance and accurately placed in the corresponding position. It is necessary to have a very accurate calculation of the entire printing process to be realized, so any small data influence can cause errors in this process, resulting in deviation of ink droplets. Therefore, the nozzle requires very detailed performance testing and data analysis for each drop of ink. The data file corresponding to each drop of ink is what we call the waveform file, which is why Serge has always insisted that customers use the correct waveform file. (The wave file is described in detail later)

Our Chunyuqiufeng CF-1016 UV flatbed printer uses the Xaar 1201 printhead.

High print quality, highly versatile and easy to integrate

The Xaar 1201 is a Thin Film Piezo Silicon Micro Electrical Mechanical System (MEMS) technology printhead for printing wide-format graphics (WFG) and textiles with dye sublimation, eco-solvent, UV or aqueous inks. It has 1280 nozzles arranged in 4 rows Printing either 1 or 2 colours at 600 dpi or 4 colours at 300 dpi native resolution.

This is the perfect printhead for OEMs looking to design graphics printers for banners, signage and POS applications because it delivers a high quality of print combined with high productivity and is easy to integrate; therefore time-to-market is minimised.

The Xaar 1201 gives OEMs an assured supply and reputable, quality printhead for the WFG and textiles markets. High print speed, high accuracy and reliability are achieved by the MEMS technology making the Xaar 1201 printhead suitable for either static or multi-pass scanning applications.

All in all, Xaar's unique waveforms and qualified inks guarantee the best quality and maximum usable time.