CIJ inkjet printer solution

Main control type selection Desktop inkjet printer, handheld inkjet printer, large character inkjet printer
This solution integrates the print head drive board and control board into a unified controller, the cost of the controller is reduced by 70%, and multiple functions are added. It is currently in mass production.
The plan is mainly to reduce the cost and failure rate of the controller. Previously, due to the large number of electronic modules and defects in the design, the equipment failure rate was high. After research, the following solutions were finally adopted:


1. Integrate the touch screen driver board, core driver board, and print head driver board into a single control board;
2. Simplified power supply, built-in DC/DC module in the control board, reducing the number of switching power supplies to one;
3. Optimize the internal algorithm, cancel the core board, and use STM32 as the main control CPU;
4. Recompile the touch screen driver, which is highly integrated into the main control CPU, without the need to realize through the interface between modules;
5. Printing can be triggered by photoelectric switch, built-in 256 printing speed, users can adjust the printing speed to adapt to the speed of the production line;
6. The printing can be triggered by a photoelectric switch, connected to a synchronizer, and the nozzle printing speed can be automatically adjusted to synchronize according to the synchronizer's dynamic tracking of the production line speed;
7. The reserved data processing speed of the controller is much higher than the speed of the print head, and can support a maximum printing speed of 500 m/min (provided that the print head can meet it) 8. Built-in 10 kinds of Chinese character libraries, 10 file font size adjustment, built-in Pinyin input method ; It can also be operated by computer connection, and data can be exported and imported through U disk at the same time;
9. Font: The maximum height is 18mm, and the maximum number of lines printed by a single nozzle is 8 lines of Chinese characters or letters;
10. Large storage capacity: The maximum length of a single print is 300 meters, and the maximum can store 499 sets of print data, which can meet most of the needs;
11. Auxiliary function: can print two-dimensional code, can print by serial number, can print bar code;
12. High precision: the maximum resolution of jet printing is 360DPI (depending on the print head);
Taking into account the high requirements of performance and cost, this solution did not use the main control system on the market, but redesigned the hardware, using the highly integrated STM32 as the main control chip, redesigned the main control system, and superimposed processing through a unique cache The algorithm uses low-speed cache to solve the problem of data lag during high-speed printing, while STM is responsible for data processing, touch screen drive, data communication, and nozzle drive tasks. The power supply part uses a multi-channel DC/DC solution, and the power supply circuit is stable and efficient , While taking into account the charging power management.

The controller of this project can actually be upgraded. For example, it can add two-color inkjet function, switch two colors of ink through the controller, one machine can meet multiple usage occasions, and even realize color inkjet printing with RGB ink. Since the customer can add multiple nozzles to improve the efficiency of the machine, this development has not been realized due to cost considerations. After communicating with the customer, we will leave it to the subsequent projects to add such functions.

Industry Classification: Industrial Electronics

Development platform: STM STMicroelectronics

Delivery form: complete machine

Performance parameters: STM32 is used as the main control CPU;

Application scenario: industrial printing