Introduction

The mono black rotary-ink-jet printing press of Oyang has currently reached a speed of 120 meters per minute, ranking among the best in the industry. So how does it achieve such a high running speed? This article will analyze it carefully for you.

CTI-PRO-440K-HD Rotary Ink-jet Digital Printing Machine

Firstly, let's introduce the print head used in this machine: Epson I3200A1 - HD. The resolution of a single print head is 1200dpi, consisting of four columns of nozzles with a single resolution of 400dpi.

（Two rows of nozzles, 400 nozzles per row,3200 noozles totally.）

Overview of the market advantages of high-resolution printheads

This is a widely used high-resolution print head in the market, and it has the following advantages

1. High resolution: With a resolution as high as 1200dpi, it can present very clear and delicate images and text, achieving excellent printing results.

2. High-precision ink droplet ejection: The ink droplet ejection performance is excellent, being able to precisely control the size and ejection frequency of ink droplets, making the images more vivid and lifelike.

3. Flexible color configuration: Users can choose different ink color combinations according to specific requirements, and using adjacent 4 channels for the same color ink can further improve the accuracy of ink droplet landing points, thus achieving more accurate and vivid color output.

4. Good compatibility: It can use the same circuit boards, inks, and waveforms as the I3200 - A1 (4-channel) print head. This compatibility enables users to avoid large-scale replacement and adjustment of related supporting equipment and consumables when upgrading or replacing the print head, reducing the use cost and operation difficulty.

5. High durability: The piezoelectric drive has high durability and can still be used normally after 1060 billion piezoelectric durability tests.

6. Easy to maintain: Compared with some other print heads, the cleaning process of this print head is relatively simple and fast. It only needs to be rinsed with clean water and then wiped with a clean cloth to be cleaned, reducing the maintenance time and cost.

7. High cost-performance: While possessing excellent performances such as high resolution and high precision, its price is relatively reasonable. In the industrial field where multi-head applications are widespread, it can reduce the cost of printing units, providing users with a high cost-performance choice.

Dual-color printhead configuration and printing resolution and speed analysis in CMYK mode

When printing in the color CMYK mode, a one-head two-color color matching mode is adopted. That is, a set of CMYK colors will be printed by two print heads. For the print head arranged in the front: the four columns of nozzles of a single print head are divided into two groups, with two columns in each group. One group is for black inkjet and the other is for blue inkjet. For the print head arranged at the back, one group is for yellow inkjet and the other is for red inkjet.

(The color arrangement of a single print head module: black and blue as one group, red and yellow as another group)

In the normal resolution mode: 600dpi (vertical resolution) * 1200dpi (horizontal resolution) 1 bit, the running speed of the device is 90 meters per minute. Among them, the horizontal resolution: 1200dpi is determined by the physical resolution of the print head, so it is fixed and unchangeable. And the vertical resolution is the key factor determining the operation of the device. The theoretical ink droplet ejection frequency per second of a single nozzle of the Epson I3200A1 - HD print head is 43000 times. To ensure the stable operation of the device, this value is basically locked at 40000 times. Therefore, taking the resolution of 600dpi of a color digital printing press as the standard. The basic principle of its running speed is as follows

40000 ink droplet ejections per second / 600dpi = 66.66 inches per second = 1.693 meters per second

1.693 meters * 60 seconds = 101.58 meters per minute

To ensure that all parts of the device can operate stably in coordination, we have set the stable production speed at 90 meters per minute.

When we print in black mode, all four columns and two groups of nozzles on the print head perform black ink-jet (i.e., dual channels). That is, theoretically, the speed in color printing mode can be doubled. However, based on the actual needs of customers, the black printing mode with a resolution of 600dpi may not have a sufficient density. Therefore, we have developed a higher density resolution of 800dpi.

The speed calculation principle

80000 ink droplet ejections per second (dual channels) / 800dpi = 100 inches per second = 2.54 meters per second

2.54 meters per second * 60 seconds = 152.4 meters per minute

Conclusion

To ensure that all parts of the device can operate stably in coordination, we have set the stable production speed at 120 meters per minute.

This is the principle by which the mono black rotary-inkjet printing press of Oyang can achieve ultra-high-speed printing. Welcome to follow, and I will bring you more information about Oyang Digital!