Question 1

What is the DPI of the print head? How to choose DPI?

Accepted Answer

DPI is resolution: measured in DPI (dots per inch), common ones are 203dpi, 300dpi, 600dpi, etc. The higher the resolution, the finer the print. 203dpi: basic logistics labels, thick barcodes (such as shipping labels). 300dpi: fine barcodes (such as medical labels), small text or simple graphics. 600dpi: high-precision images, micro text (such as electronic component labels, anti-counterfeiting labels).

Question 2

Can the print head be repaired?

Accepted Answer

The print head is a precision electronic component and is usually not repairable. It is recommended to replace it directly.

Question 3

How long is the life of the print head?

Accepted Answer

Depending on the frequency of use, media type and maintenance, it is generally 30-50 km in length, and some industrial print heads can print up to 100 km in length.

Question 4

What is the difference between thermal transfer and thermal printing?

Accepted Answer

Thermal transfer printing: requires a ribbon, and the printed content is durable, suitable for long-term labels (such as logistics and warehousing). Thermal printing: no ribbon is required, and the thermal paper is directly heated to develop color, but the inside is easy to fade (such as cash register receipts).

Question 5

What is the working principle of a thermal transfer print head?

Accepted Answer

The interior of the print head is composed of tiny heating elements (dot matrix). After power is turned on, the heating elements are selectively heated according to the printing signal, so that the ribbon coating melts and transfers to the surface of the medium to form a clear image or text.

Question 6

What are the advantages of Codewel compatible print heads?

Accepted Answer

1 Ultra-high quality, all accessories are 100% brand new, made in China.
2 Adopt thin film technology and independently develop internal circuit board design.
3 Provide the same warranty as the original print head.
4 With a 20-year experience R&D team in the first-class Rohm company, the quality of the print head can be controlled.

Question 7

How to correctly install the thermal transfer print head?

Accepted Answer

1 Turn off the power of the device and remove the old print head according to the steps in the instruction manual.
2 Clean the installation area to ensure that there is no dust or residue.
3 Align the new print head and fix the screws (avoid over-tightening).
Calibrate the pressure after installation to ensure that the print head and the rubber roller are in uniform contact.

Question 8

What should I do if the printing density is uneven?

Accepted Answer

1 Check whether the print head pressure is balanced and adjust the rubber roller pressure.
2 Clean the surface of the print head.
3 Confirm that the ribbon matches the media (such as wax-based, mixed-based or resin-based carbon ribbon).

Question 9

How often do you need to clean the print head?

Accepted Answer

1 Regular use: Clean after each roll of ribbon is replaced or at the end of each day's work.
2 High-load use: clean every 2-3 hours.
3 Clean immediately when you find that the print quality has deteriorated.

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