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The core reasons for handheld inkjet printers not coding are concentrated in three categories: abnormal ink supply, nozzle clogging/failure, and equipment setting/operation problems. The details can be investigated according to the following dimensions:
1. Ink supply related issues
- The ink tank/ink bag is empty or is not installed properly, resulting in no ink entering the spray chamber.
- The ink has abnormal viscosity (such as viscosity caused by low temperature, and the ink has expired and deteriorates) and cannot flow normally.
- The ink supply line is blocked or leaks, interrupting ink transfer.
2. The sprinkler head is blocked or faulty
- The nozzle has not been used for a long time, and residual ink dries and blocks the nozzle (the most common reason).
- The nozzle is subject to physical impact, wear, or damage to internal components, and cannot discharge ink normally.
- The nozzle protective cover has not been removed, or there is foreign matter (such as dust, ink stains) blocking the nozzle.
3. Device setup and operation issues
- The coding function is not turned on (e.g., the "Printing" button is not pressed, the pause/standby mode is accidentally touched).
- The coding distance is too long (it exceeds the effective printing range of the equipment, and usually needs to be close to the sprayed object 1-3mm).
- Low power or poor battery contact, unstable power supply of the equipment, unable to drive the inkjet module.
- Parameter setting error (such as printing speed, character size settings are unreasonable, or "blank printing" mode is selected).
4. Other hardware failures
- Motherboard, printing module and other internal components failure, resulting in equipment can not issue printing instructions.
- The connecting wire is loose or in poor contact (such as the connecting wire between the nozzle and the host falls off).
