In daily production on Mitsubishi series presses, ghosting and doubling are among the most common issues faced by press operators and maintenance personnel. These Japanese-built machines are known for high durability and stable ink density, with cylinder diameters designed to balance speed and quality. If not addressed promptly, the consequences range from impaired registration accuracy and print quality to prolonged downtime in severe cases.
1. Fault Symptoms: Periodic doubling appears on the print parallel to the image, or regular density variations (ghosting) appear in solid areas.
2. Cause Analysis: Mismatch between roller diameter and oscillating roller phase causes roller ghosting; blanket looseness or uneven tension; insufficient ink supply in the ink train leading to solid-area ghosting; cylinder vibration. Given that Mitsubishi Japanese machines excel in durability and ink stability, with cylinder diameters engineered for both speed and quality, troubleshooting should prioritize checking key components against standard parameters.
3. Operational Misconceptions: Verify roller diameters and oscillating roller ink volume settings; re-tighten the blanket and even out the packing; increase ink supply or change the order of ghost-prone colors; reinforce cylinder bearings to reduce vibration.
4. Common Mistakes: Never blindly increase pressure or dampening based on experience; any changes to Mitsubishi console parameters must be recorded and re-verified; do not 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. These methods also apply to models such as the D3000, DiaPress, Diamond series, and 3F. For practical operation, refer to the MAC automatic control system / CCB ink fountain and on-site conditions. For complex situations, it is recommended to contact professional maintenance support via the printm.cn platform.
