1. Over-reliance on "automatic cleaning" and neglecting deep maintenance. Many operators frequently activate the machine's built-in "printhead cleaning" function as soon as they notice ink flow problems from the printhead.
The problem is: this basic cleaning only removes minor blockages and is ineffective against dried ink deposits or accumulated impurities. Excessive cleaning also wastes ink, increases waste ink, and can even lead to ink pressure imbalances.
Correct approach: If three consecutive automatic cleaning cycles are ineffective, stop operation and use an ultrasonic cleaner for deep cleaning, or contact professional after-sales service for disassembly and maintenance.
2. Focusing only on the printhead and neglecting the transmission system inspection. Maintenance often focuses on the printhead assembly while neglecting the condition monitoring of the transmission system.
Actual impact: Problems such as loose timing belts, excessive gear meshing clearance, and insufficient guide rail lubrication can cause station positioning drift, manifesting as "misregistration," which is often misdiagnosed as a printhead problem, delaying the diagnosis of the true fault.
Recommendations: Check the timing belt tension monthly and inspect the wear of transmission components every 6 months to ensure stable mechanical operation.
3. Using Inferior Consumables, Creating Potential for Clogging
To reduce costs, some users choose non-original manufacturer-certified inks or cleaning agents.
Risk Points: Inferior inks contain many impurities and have unstable viscosity, easily causing nozzle micro-clogging or ink path blockage; temperature changes may also cause precipitation, forming stubborn blockages.
Prevention Measures: Insist on using genuine inks recommended by the equipment manufacturer, and allow them to stand in a constant temperature environment for a period of time before replacement to ensure viscosity stability.
4. Lazy Maintenance: Incomplete Cleaning and Inadequate Lubrication
Daily cleaning only scratches the surface, leaving ink to accumulate in hidden areas such as guide rail corners and the bottom of the ink stack, forming hard deposits.
Lubrication is often haphazard, using ordinary grease instead of high-temperature grease, which easily dries and fails at high temperatures.
Consequences: Increased guide rail resistance, accelerated bearing wear, and noticeable resistance when manually pushing the table without prompting attention.
Improvement Directions: Thoroughly clean the guide rails and table after daily shutdown; apply high-temperature grease to transmission nodes monthly to maintain smooth operation.
5. Neglecting Environmental Factors: Static Electricity and Temperature/Humidity as "Hidden Killers"
Static electricity buildup in dry environments can interfere with ink droplet flight paths and attract dust, contaminating printheads.
When workshop temperatures are too low, ink viscosity increases, reducing fluidity; when too high, it easily evaporates and dries.
Solutions: Maintain workshop humidity between 40-60%, and use a humidifier or constant-temperature ink tank if necessary; regularly clean dust from the equipment's static grounding points to ensure proper grounding.
6. Unstable Voltage Without a Regulated Power Supply
Fluctuating power supply voltage, like a "roller coaster," can cause printheads to become sluggish or even burn out the control module.
Common Misconception: "A slight voltage difference doesn't matter"-In reality, PLC control systems are extremely sensitive to voltage fluctuations.
Solution: Equip the equipment with a dedicated regulated power supply to ensure the input voltage is stable within the range of 380V±5%.
7. Lack of Maintenance Records, Inability to Trace the Root Cause of Problems
The lack of a systematic maintenance log makes it impossible to determine whether certain types of faults occur periodically, or to assess spare parts replacement cycles.
Recommended Practice: Establish a maintenance log to record each cleaning, lubrication, component replacement, and fault handling event, facilitating subsequent analysis and plan optimization.
