In daily production on BEIREN series printing presses, doubling and ghosting are among the most common problems encountered by press operators and maintenance personnel. As a representative domestic offset press brand, this model features strong parts interchangeability, low maintenance costs, and electrical systems mostly controlled by domestic PLCs. If not addressed promptly, the consequences range from compromised registration accuracy and print quality in minor cases, to extended downtime in severe ones.
1. Fault Symptoms: Periodic doubling appears on the printed product parallel to the image, or regular ink density variation (ghosting) appears in solid areas.
2. Cause Analysis: Mismatch between roller diameter and oscillating roller phase produces roller doubling; loose or unevenly tensioned blankets; insufficient ink train supply causing solid-area ghosting; cylinder vibration. Given the characteristics of BEIREN as a representative domestic offset press—strong parts interchangeability, low maintenance costs, and domestic PLC-controlled electrical systems—troubleshooting should prioritize checking key components and standard parameters.
3. Operational Pitfalls: Checking roller diameter and oscillating ink settings; re-tensioning blankets and leveling packing; increasing ink train supply or changing color sequence prone to ghosting; reinforcing cylinder bearings to reduce vibration.
4. Common Mistakes: Avoid blindly increasing pressure or water supply based on experience; any parameter changes on the BEIREN control console must be recorded and verified; never force manual rotation or bypass safety interlocks while the press is running.
5. Preventive Measures: Regularly measure roller diameters; avoid prolonged solid printing with low ink settings; replace blankets on a scheduled basis. The above methods also apply to BEIREN 300, BEIREN 400, PZ4880, N300 and other models. For practical operation, refer to the domestic CNC system / centralized lubrication control and on-site conditions. For complex situations, it is recommended to contact professional maintenance support through the printm.cn platform.
