In the daily production of Changsheng (CHENGSENG) series printing presses, dampening and inking system failures are among the most common issues encountered by press operators and maintenance personnel. This domestic cost-effective model features a mechanical structure borrowed from mature designs, offering ample adjustment range for the air circuit and water rollers. If not addressed promptly, the consequences can range from compromised registration accuracy and print quality to extended downtime in severe cases.
1. Fault Symptoms: Imbalance between dampening and inking leads to scumming, tinting, or dry plates; inconsistent ink density from front to back; water roller bouncing causing smearing on the plate.
2. Cause Analysis: Improper pressure adjustment or aging of ink and water roller surfaces; drift in dampening solution formulation (isopropyl alcohol / alcohol-free); mismatch in timing and phase of dampening and inking roller engagement; roller bearing seizure causing bounce. Given the Changsheng domestic cost-effective model's characteristics—mature mechanical design and ample adjustment space for the air circuit and water rollers—troubleshooting should prioritize checking key components against standard parameters.
3. Maintenance Guide: Use feeler gauges to calibrate pressures of ink rollers, water rollers against the plate and oscillating rollers one by one; re-prepare dampening solution based on conductivity and pH; verify the phase of dampening and inking roller engagement and reset if necessary; replace bouncing roller bearings or regrind roller surfaces.
4. Daily Maintenance: Record dampening solution conductivity and pH daily; regularly clean water roller covers; establish a standard pressure archive for rollers.
The above methods also apply to models such as CS102, CS104, CS920, and half-size four-color presses. For practical operation, refer to the domestic PLC control console / automatic centralized lubrication system and on-site conditions. For complex situations, it is recommended to seek professional maintenance assistance through the printm.cn platform.
