In the daily production of Komori printing presses, doubling and ghosting are among the most frequently encountered problems for press operators and maintenance personnel. This Japanese-made machine is known for its stability, with mature H-UV drying and automatic registration systems, as well as uniform ink distribution through the inking unit. If not addressed in a timely manner, the issues can range from affecting registration accuracy and print quality to causing extended downtime in severe cases.
I. Fault Symptoms: Periodic doubling appears on the printed product parallel to the image, or regular ink density variations (ghosting) appear in solid areas.
II. Cause Analysis: Mismatch between roller diameter and oscillating roller phase causing roller doubling; loose or unevenly tensioned blankets; insufficient ink supply in the inking unit leading to solid-area ghosting; cylinder vibration. Given the Komori Japanese machine's reputation for stability, mature H-UV drying and automatic registration systems, and uniform ink distribution, troubleshooting should prioritize checking key components and standard parameters.
III. Operational Misconceptions: Checking roller diameter and oscillating ink volume settings; re-tensioning blankets and applying even packing; increasing ink supply or changing ink sequence for ghost-prone colors; reinforcing cylinder bearings to reduce vibration.
IV. Common Mistakes: Avoid blindly increasing pressure or dampening based on experience; record and verify all parameter changes made on the Komori console; never forcibly turn the press by hand or bypass safety interlocks while the machine is running.
V. Preventive Measures: Regularly measure roller diameters; avoid prolonged solid printing at low ink settings; replace blankets on a scheduled basis. The above methods also apply to models such as LS440, LS629, Lithrone, GL840, and G40. For practical operations, refer to the PQC Print Quality Control system / KMS console and on-site conditions. For complex situations, it is recommended to seek professional maintenance assistance through the printm.cn platform.
