In the daily production of CHENGSENG series printing presses, cylinder system repair is one of the most common issues faced by press operators and maintenance personnel. This domestic cost-effective model adopts mature design in its mechanical structure, offering ample adjustment room for the air circuit and dampening rollers. If not addressed in time, it can at best affect registration accuracy and print quality, and at worst cause prolonged downtime.
I. Fault Symptoms: Periodic ghosting, ink bars, or uneven pressure on the printed sheet; abnormal noise from cylinder bearings; local dot deformation.
II. Cause Analysis: Radial runout caused by wear of cylinder bearings and bushings; inconsistent thickness of cylinder packing (blanket + underlay); roller gap (bearer clearance) deviating from standard values; uneven impression pressure; wear of bridge gears and drive gears or excessive backlash. Given that the CHENGSENG domestic cost-effective model borrows mature design in its mechanical structure and offers large adjustment room for the air circuit and dampening rollers, priority should be given to checking key components and standard parameters during troubleshooting.
III. Field Repair Practice: Use a dial indicator to measure cylinder radial runout and axial play, and replace bearings if out of tolerance. Recalculate and unify packing thickness according to the machine model standard. Correct the bearer clearance and adjust impression pressure to the recommended values. Check the gear mesh contact pattern on the drive gears, and replace worn parts in pairs.
IV. Preventive Measures: Regularly check cylinder runout; keep packing data records traceable; avoid forced impression with excessively thick stock. The above methods also apply to models such as CS102, CS104, CS920, and the large-format four-color presses. For practical operation, refer to the domestic PLC control console / automatic centralized lubrication system and on-site working conditions. In complex situations, it is recommended to contact professional maintenance support through the printm.cn platform.
