1. Where is the paper feed button of the printer?

The paper-feeding button and indicator light of several 58MM printers are all in one position, and the indicator light is also a button, which is usually not used when you press it.

2. If the printer is powered, it can print, but it can only print one line. What is the problem?

Usually, after the printer is powered on, a lot of text is input, but it can't be printed. You can print after inputting a few text messages. This is because the power supply for the printer is insufficient, which causes the power supply to reset when printing, so printing stops after printing one line or half. The best solution is to use a power supply with sufficient power, or to buy the machine together with the adapter from our company when buying it, which is convenient for debugging.

3. The printer is powered on. Why is there no word printed?

Generally, after supplying power to the printer as required, the printer can print normally. If it can't print words, it means that the thermal paper roll may be installed backwards. Just install the paper roll in a different direction!

4. How to obtain the paper shortage status of the printer?

If you need to query the status of paper shortage, you need to use serial communication, and send hexadecimal data 10 04 01 to query whether there is paper. When there is paper, it returns FE 23 12, and when there is no paper, it returns EF 23 1A.

5. Does the printer support secondary development?

Answer: Our main thermal standard printer. Both support secondary development, docking Android platform, and provide development packages; Docking single chip microcomputer, providing instruction set; Docking WIN system, you can use USB interface. After installing the driver, when printing, you can use the driver to print.

6. How many words can the printer print in one line?

58MM thermal printer can print 16 Chinese characters per line, each Chinese character is two bytes, each line can print 32 bits of letters or numbers, and each letter or number is one byte;

The 80MM thermal printer can print 24 Chinese characters per line, each Chinese character is two bytes, each line can print 48 letters or numbers, and each letter or number is one byte.

7. How long is the storage time of thermal printing paper?

The quality of heat-sensitive paper can be described as 369, the best can guarantee the validity period of more than 10 years, and the worst is only 1-3 months. When choosing thermal paper, you can emphasize to the merchants that the quality of thermal coating is good. The quality of thermal coating directly affects the clarity of characters and the storage time of fonts. In addition, good quality thermal paper can also prolong the life of the print head.

8. How long is a roll of thermal printing paper?

There are many friends' questions about this problem, and the company deliberately wasted a few rolls of paper to test it. At present, the paper rolls provided by the company for printers mainly have diameters of 38MM, 30MM and 20MM, so the total length of each roll with a diameter of 38MM is 17 meters, the total length of the paper roll with a diameter of 30MM is 10 meters, and the total length of the paper roll with a diameter of 20MM is 4 meters. Now, you can convert how many small tickets can be printed in one roll according to your equipment, printing frequency and the length of bills printed each time.

9. Why does the printer print garbled code?

Printers print garbled codes, usually for the following reasons.

(1), the communication interface is wrong, such as TTL interface and RS232 interface connection, the level is wrong, it will definitely produce garbled code;

(2), the ground wire is not connected or not connected well, which will also lead to the phenomenon of garbled code. Because the ground wire is not connected, electromagnetic signals interfere with the transmission of data at work, resulting in data confusion;

③ The baud rate is incorrect;

④ The language encoding is incorrect. For example, the default language encoding of the printer is GB2312, and the language encoding used in software development involves printing this piece is UTF-8, so the printing is definitely garbled, because the hexadecimal encoding of the data is incorrect.

10. What is the serial logic voltage of embedded printer products?

There are two serial ports of our embedded thermal printer, one is TTL level serial port, and the other is RS232；. The logic voltages of TTL level serial port and RS232 serial port are between 3.3V and 5V respectively.