How to Diagnose Faults in an Automatic Oval Printing Machine?

Feb 23, 2026

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I. Fault Self-Check and Alarm System
Modern equipment typically has fault self-check and alarm functions, which can promptly display abnormal codes or prompts. This is the most direct basis for diagnosis.

II. Common Fault Phenomena and Quick Diagnosis

1. Abnormal Noise and Vibration

Symptoms: Abnormal noise, shaking, or vibration occurs during operation.

Possible Causes: Loose screws, worn tracks/bearings, insufficient lubrication, stuck flywheel belt, or damaged bearings.

2. Control and Adjustment Malfunction

Symptoms: Control panel unresponsive, resistance cannot be adjusted, slope adjustment malfunction.

Possible Causes: Control panel malfunction, damaged resistance adjuster, hydraulic cylinder oil leak, or stuck mechanical parts.

3. Operation Interruption and Positioning Deviation

Symptoms: Machine suddenly stops, overall pattern misalignment, misregistration.

Possible Causes: Power supply problem, motor sensor malfunction, transmission system problem (such as flywheel belt), systematic positioning deviation.

4. Decreased Mechanical Precision

Judgment: The printed pattern appears blurry, ghosted, or has uneven diagonal lengths.

Possible Cause: Insufficient mechanical precision; calibration is required. ^[Previous Answer]^

III. Troubleshooting Process

Preliminary Inspection: Observe the equipment's appearance, listen for sounds, and check the control panel display.

Simple Solution: Tighten screws, apply grease, and restart the system.

Professional Repair: If the problem persists, contact a professional repair technician.

IV. Preventive Maintenance

Regular Lubrication: Apply grease to joints, tracks, and other parts monthly.

Regular Inspection: Inspect screws, electronic circuits, and transmission components quarterly.

Standardized Operation: Avoid overloading to reduce the occurrence of malfunctions.

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