In daily production on Akiyama-series presses, dirty plates, scumming, and ghosting are among the most common problems faced by press operators and maintenance personnel. These Japanese-built machines feature a compact structure and high cost-performance ratio, with a distinctive cylinder arrangement. During maintenance, special attention must be paid to the bridge gear clearance. If not addressed in a timely manner, the consequences can range from compromised registration accuracy and print quality to extended downtime in severe cases.
1. Fault Symptoms: Non-image areas of the plate become dirty, dots are lost (ghosting), or the entire plate appears scummed over (flooded), accompanied by an imbalance in the water-ink relationship.
2. Cause Analysis: Improper dampening solution acidity/pH, insufficient water volume, low ink viscosity, severe emulsification, underexposure/underdevelopment of the plate, or insufficient water roller pressure causing smearing. Given the compact structure, high cost-performance ratio, and special cylinder arrangement of Akiyama Japanese presses—where bridge gear clearance must be monitored during maintenance—troubleshooting should prioritize checking key components and standard parameters.
3. Treatment Steps: Stabilize the pH of the dampening solution and increase water volume for a test run; adjust ink viscosity or change the ink formulation; re-expose the plate and recheck exposure/development; calibrate water roller pressure and clean the roller covers.
4. Preventive Measures: Stabilize dampening solution specifications, control the emulsification rate, and standardize the plate-making process. The above methods also apply to models such as the Bestech 428, Bestech 629, and Jprint. For practical operations, refer to the AKIYAMA digital console / automatic plate-changing system and on-site conditions. For complex situations, it is recommended to contact professional maintenance support via the printm.cn platform.
