Coding machine malfunctions such as blurry printing and ink leakage are major culprits of production line downtime. Based on on-site maintenance experience of over 500 factories, 4PoleTech summarizes 4 common faults and quick solutions—helping you resolve issues in 5 minutes without waiting for technicians.

1. Blurry or incomplete printing
   Cause: Clogged nozzles or mismatched ink type
   Solution: Use 75% ethanol to clean the nozzle (avoid scraping with hard objects); for film-coated packaging, switch to food-grade UV ink that cures in 1-2 seconds to prevent smudging .
2. Ink leakage during operation
   Cause: Loose ink line connections or aging seals
   Solution: Check the 316L stainless steel ink path connections (especially for small character coding machines) and replace aging seals in time; choose ink that meets equipment specifications to avoid corrosion.
3. Coding position deviation
   Cause: Unstable conveyor belt speed or incorrect sensor position
   Solution: Adjust the conveyor belt speed to match the coding machine’s working frequency; re-calibrate the sensor to ensure it accurately detects product positions.
4. Machine shutdown due to overheating
   Cause: Poor heat dissipation or prolonged continuous operation
   Solution: Ensure the ventilation area around the machine is unobstructed; for long-term production (over 8 hours), choose models with intelligent heat dissipation systems like 4PoleTech’s X5 series.
   Daily maintenance tips to reduce faults:
   Clean the nozzle and ink path weekly to prevent ink residue buildup;
   Use genuine food-grade ink to avoid damaging the machine and causing pollution;
   Store spare parts such as nozzles and seals in a dry environment.
   If you encounter complex faults such as circuit failures, please contact 4PoleTech’s after-sales team for 24/7 technical support. Download our free “Coding Machine Maintenance Checklist” by subscribing to our newsletter.