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Seiko Print Head VS Xaar Print Head: Daily Maintenance

Since the structure and design of the Seiko print head and the XAAR print head are different, the daily maintenance will also be different, so we cannot operate the Seiko print heads according to the daily operation methods of the XAAR print head.

Differences in Ink Requirement

First of all, the accuracy of Seiko print heads is much higher than that of XAAR ones, which means that the ink dots of a single hole of Seiko ones are very small, only 35pl. The ink dots of the XAAR printhead are 80pl. In this case, the requirements for the ink are very high. The dye particles and impurities in the ink will affect the nozzle holes, causing the nozzle holes to be blocked and deflected. Therefore, you must first choose Seiko’s special ink, because the ink’s particles, viscosity, and other indicators are completely different from ordinary XAAR printhead ink. Choosing inks suitable for other print heads or substitute inks will have an impact on the Seiko print heads. At least, problems such as frequent ink breaks and blurred printing may occur. At worst, it may cause internal damage to the printhead, causing irreparable losses.

Indoor Cleanliness of Seiko Print Head

Compared with XAAR printheads, Seiko printheads require relatively high indoor cleanliness. Although the ink supply system of Seiko equipment adopts a closed design, fine dust cannot be avoided from entering the ink supply system. This dust may cause deposition inside the printhead and block the nozzle holes, so it is also necessary to ensure the cleanliness of the indoor environment. The test results show that equipment working in a relatively clean environment has a significantly lower probability of print head clogging and deflection than equipment working in a dusty environment.

Seiko Print Head Circuit

Compared with the XAAR print head, the circuit part of the Seiko print head is exposed to the outside. During cleaning and night protection, be sure not to let cleaning fluid and ink come into contact with the exposed circuit part and the nozzle connection part. If it comes into contact with cleaning fluid or liquid, be sure to wipe it clean in time, and then dry it before powering on, otherwise, the circuit board and electrodes of the print head will be damaged.

Seiko 510-50 print head

Differences in Print Head Clogging

Because the printing accuracy of Seiko print heads is relatively high, the printing quality will be significantly affected when the nozzle holes are clogged. Therefore, when the print heads are found to be clogged, they must be cleaned immediately. Due to the characteristics of the ink, if the nozzle holes are not cleaned in time, the ink in the nozzle will completely solidify, which is not conducive to smooth cleaning.

Usage of Non-Woven Fabric for Xaar Print Head

When protecting XAAR printheads at night, many customers will use the same non-woven fabric repeatedly. This will cause the non-woven fabric to be contaminated by impurities in the air and the ink components in the non-woven fabric to dry up when it is idle, which is not conducive to the protection of the printhead. Therefore, it is recommended that customers who use Seiko printhead ensure the cleanliness of the non-woven fabric and the content of the non-woven fabric cleaning fluid during night protection, and frequently replace it with new ones. To avoid damage to the nozzle holes of the printhead.

The nozzle of the Seiko printhead is protected by steel sheets to prevent it from being scratched during the printing process. However, the nozzle part of the printhead is not made of steel, so do not use hard objects or non-standard cotton swabs and paper towels to wipe the surface of the printhead. Otherwise, it will cause damage to the water-repellent film around the nozzle, causing the ink to drip during printing.

Printhead Cleaning Methods

When the printhead is removed and cleaned, a syringe may be used for cleaning. Many XAAR printhead users mostly use plastic syringes for printhead cleaning and do not clean the inside of the syringe before cleaning the printhead. It is strongly recommended that users of Seiko printheads use a glass syringe when cleaning it. Because the plastic part of the plastic syringe, especially the black rubber part, will react chemically with the cleaning fluid and be corroded, and the corroded rubber components will spread to the cleaning fluid, causing contamination of the cleaning fluid. When it enters the interior of the printhead, it causes the printhead filter and nozzle holes to become clogged. When cleaning Seiko printheads, try to use the equipment’s own cleaning function to clean them.

Time for Soaking the Printhead

Customers using XAAR printheads often use the soaking method when the printhead is clogged. Some customers will soak the XAAR 128 printhead for up to 1 week or even longer. The purpose of this is to allow the inside of the printhead and the nozzle to be fully soaked with cleaning fluid for a long time. To obtain a better cleaning effect. However, Seiko printheads cannot be soaked in cleaning fluid for a long time, because soaking for more than 48 hours will have an impact on the printhead, causing the nozzle nozzle to deflect. The time for soaking the printhead in cleaning fluid should be within 48 hours.

Selection of Cleaning Fluid

For printheads that have not been used for a long time (used printheads), XAAR generally uses a special protective liquid to inject it into the interior of the printhead. This liquid is non-volatile and can ensure that the nozzle holes are moist and not blocked within a certain period. However, this kind of protective liquid is not suitable for Seiko printheads. When the Seiko printheads are not used for a long time, you can use Seiko’s special cleaning fluid to clean out the ink inside the nozzles until the outflowing cleaning fluid has no obvious color, and then remove the cleaning fluid inside the printheads. After it is vacated naturally, follow the daily printhead protection method and use non-woven fabric and plastic wrap to protect it.


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