Thermal printing technology uses special thermal paper or labels to print without the need for ink or ribbon by controlling the heating elements of the print head. This technology is widely used in industries such as retail, logistics, and healthcare, and is widely welcomed due to its simplicity, efficiency, and energy-saving features.
Thermal printing technology has become an indispensable part of modern commercial applications due to its simplicity, efficiency, and environmental friendliness. This solution integrates advanced hardware and software technologies to provide reliable printing solutions, meeting the high-quality and high-efficiency printing needs of various industries while reducing operating costs and environmental impact.
From the above figure, it can be seen that thermal printers are mainly divided into the following three parts
1. Communication interface
We can use different interfaces as media to transmit printing data here. The Sirui Technology thermal printer solution currently supports serial/parallel/Bluetooth/wifi/USB interfaces, and the printing protocol supports ESC. If customization is required, please contact us.
2. Printing data processing
After receiving data, the thermal printer will determine whether it is an instruction or text content. If it is text content, it will directly read the font library data for font processing. If it is determined to be an instruction, it will perform corresponding processing. Generally, portable thermal printers do not require a font library because they are connected to an APP, so they use ESC's raster command for printing.
3. Print head driver
As can be seen, the above diagram is the circuit diagram of the print head, which includes the voltage VH used for heating and the ground GND. Depending on the size of the print head, the heating signal line STBx may vary, generally consisting of 64 point STBs, as well as LAT, DI, and CLK used for transmitting print data. Finally, the VDD power supply and print head temperature sensor TM provide internal operation
● Print head width: 9mm-219mm
● Printing density: 8dot/mm (203dpi)/12dot/mm (300dpi)
● Printing speed: 50mm/s-150mm/s
● Communication interface: serial/parallel/Bluetooth/wifi/USB
● Support instruction set: ESC
● Consumables binding: Supports
The above figure shows the timing sequence of data transmission in the print head. The relationship between CLK and DI can be seen, and their driving peripherals can be transmitted using SPI. For each line of data transmitted, the LAT signal will be lowered for signal latch, and then STBx will be enabled for heating, thus completing the printing of one line of data
The above figure shows the timing sequence of the stepper motor drive. The thermal printer sends current pulse signals to the motor, causing the stator coil to generate current and corresponding magnetic field, thereby causing the rotor to rotate. Each time a pulse signal is input, the rotor will rotate a fixed angle, which is called the step angle. By continuously inputting pulse signals, the continuous rotation of the motor can be achieved
Retail industry: Printing product labels and receipts.
Logistics industry: Printing of package labels and transportation documents.
Medical industry: Printing medical record labels and prescription labels.
Home Industry: Label Printing.
Education Industry: Error Machine.
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