In the daily production of BEIREN series presses, dampening and inking system faults are among the most common problems encountered by press operators and maintenance personnel. As a representative domestic offset press, this model features strong parts interchangeability, low maintenance costs, and electrical systems mostly controlled by domestic PLCs. If not addressed promptly, the consequences can range from compromised registration accuracy and print quality to extended downtime in severe cases.
1. Fault Symptoms: Ink-water imbalance causing scumming, plugging, or dry-up on the plate; inconsistent ink density from front to back; water roller bouncing and smearing the plate.
2. Cause Analysis: Improper pressure adjustment or roller surface aging on dampening and inking rollers; drift in dampening solution ratio (isopropanol/alcohol-free); mismatch in timing and phase between water and ink distribution; roller bearing seizure causing bounce. Given the characteristics of BEIREN as a representative domestic offset press with strong parts interchangeability, low maintenance costs, and domestic PLC-controlled electrical systems, priority should be given to checking key components and standard parameters during troubleshooting.
3. Maintenance Guide: Use feeler gauges to correct pressures on inking rollers, dampening rollers, plate cylinders, and vibrator rollers one by one; reconfigure dampening solution according to conductivity and pH values; verify and, if necessary, reset the phase of water and ink distribution timing; replace bouncing roller bearings or regrind roller surfaces.
4. Daily Maintenance: Record dampening solution conductivity and pH daily; regularly clean dampening roller covers; establish a standard roller pressure documentation file. The above methods also apply to models such as BEIREN 300, BEIREN 400, PZ4880, and N300. For practical operations, refer to the domestic CNC system / centralized lubrication control and on-site working conditions. For complex situations, it is recommended to contact professional maintenance support through the printm.cn platform.
