A: This issue is usually related to:
• Unbalanced rollers
• Loose transmission components
• Excessive operating speed beyond machine design limits
Solution:
Balance the rollers, tighten transmission components, and operate the machine within the recommended speed range.
Note: Stable operation ensures better print quality and extends machine lifespan.

A: Possible causes include:
• Loose mechanical components
• Insufficient lubrication
• Bearing wear

Solution:
Stop the machine immediately, inspect all fasteners, apply proper lubrication, and replace worn bearings if necessary.
Note: Abnormal noise is an early warning signal and should never be ignored.

A: This is often caused by:
• Excessive printing pressure
• Poor-quality or incompatible printing plates
• Improper plate installation

Solution:
Reduce printing pressure, use qualified flexo plates designed for water-based ink, and ensure correct plate mounting.
Note: Proper pressure control significantly extends plate service life.

A: Common reasons include:
• Poor ink drying performance
• High ambient humidity
• Insufficient ventilation or drying airflow

Solution:
Use water-based ink suitable for the local climate, improve workshop ventilation, and enhance air circulation in the printing section.
Note: Environmental conditions have a direct impact on water-based ink drying speed.

A: This problem is usually related to:
• Ink viscosity is too low
• Insufficient pressure between rollers
• Clogged anilox roller cells

Solution:
Increase ink viscosity to the recommended level, adjust roller pressure, and clean the anilox roller thoroughly.
Note: Regular anilox cleaning is critical for stable and repeatable print results.

A: This issue is commonly caused by:
• Excessive printing speed
• Ink viscosity that is too low
• Excessive pressure between printing rollers

Solution:
Reduce the printing speed appropriately, adjust the ink viscosity to the recommended range, and decrease roller pressure to a stable and controlled level.
Note: Ink misting not only affects print quality but also increases machine contamination and maintenance frequency.

A: Typical causes include:
• Dirty anilox roller cells
• Uneven pressure between rollers
• Ink circulation system contamination

Solution:
Clean the anilox roller regularly, balance the roller pressures, and ensure the ink circulation system is clean and functioning properly.
Note: Proper anilox maintenance directly affects print quality and ink consumption.

A: This is often caused by:
• Corrugated sheets stacked unevenly on the feeding table
• Incorrect front stop height setting relative to board thickness
• Improper guide wheel position or insufficient pressure
• Dust, debris, or waste paper blocking the feeding path

Solution:
Keep sheets neatly aligned, adjust the front stop height to approximately 1.5 times the board thickness, reset the guide wheel position and pressure, and clean the feeding section thoroughly.
Note: Keeping the feeding path clean is essential for stable high-speed operation.

A: Possible reasons include:
• Creasing wheel pressure is too low
• Creasing wheel surface is worn
• Incorrect creasing position

Solution:
Gradually increase the creasing wheel pressure, replace worn creasing wheels, and readjust the creasing position.
Note: Pressure adjustment should be done step by step to avoid cracking the liner or fluting.

A: This problem is typically related to:
• Dull slotting knives
• Insufficient slotting knife pressure
• Poor or unsuitable corrugated board quality

Solution:
Sharpen or replace the slotting knives, adjust the slotting pressure properly, and use corrugated board with suitable paper strength and quality.
Note: Slotting knives should be inspected and maintained on a regular basis.

A: Common causes include:
• Skewed or unstable sheet feeding
• Misalignment of the printing plate position

Solution:
Check and adjust the feeding system to ensure smooth and straight sheet delivery, and recalibrate the printing plate position.
Note: Regular registration calibration is recommended to maintain stable printing accuracy.