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PrintGuard Inline – Offset Inline Inspection System
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PrintGuard Inline – Offset Inline Inspection System

With experience from over 100 inline inspection systems installed on banknote printing machines, we advocate the concept of printing process quality control to improve product quality and reduce waste. Through analysis of printing defect data, it provides quality improvement suggestions and helps to enhance the efficiency of enterprises. The system performs real-time inspection and control for leaflets, textbooks, publications, pharmaceutical packaging, cigarette packaging, and consumer goods packaging. It supports a wide range of substrates, including white card, offset paper, coated paper, metallized paper, holographic paper, and gold/silver card.

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    Product features

    • Defect Detection: High-speed color cameras capture 100% of printed images for defect, registration, and color inspection.
    • Color Control: Monitors CMYK density variations during printing, directly linked to ink keys for fast adjustments.
    • Registration Check: Real-time detection of skew, color-to-color alignment, and front-to-back registration.
    • Waste Handling: Configurable thresholds; alarms, stop commands, markers, or ink-jet tagging for continuous or severe waste.
    • Smart Modeling: Automatic reference point selection with one-click intelligent modeling.
    • Data Analytics: Detection data can be uploaded to the MES system via the PrintVision platform. The system supports defect analysis, grading management, quality traceability, print quality scoring, and production shift evaluation based on quality metrics.

    Specifications

    Details

    Descriptions

    Compatible Presses

    Heidelberg, KBA, Komori, Mitsubishi, Roland, etc.

    Paper Weight

    30~450g

    Max Inspection Speed

    20,000 sheets/hour

    Installation Position

    Last cylinder

    Overprint Detection  Accuracy

    ≥ 0.1mm

    Inspection Format

    Matches all press format

    Color Deviation Detection

    Full-area ink density detection，CMYK density detection (optional)

    Waste Handling

    Sound & light alarm, marker insertion (optional), ink-jet marking (optional)

    Defect Type

    White spots, ink spots, streaks, smears, scumming, ghosting, see-through, holes, wrinkles, oil stains, insects, paper defects, tears, etc.

    Variable Information Detection

    Barcode, QR code, etc.

    First Print Inspection

    PDF template (optional)

     FAQs

    • What functions does the Offset Inline Inspection System provide?

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      The system continuously monitors print quality during production. It performs defect inspection, registration check, and color monitoring in real time, ensuring that quality issues are detected immediately. By identifying problems at an early stage, it prevents continuous defects and avoids large-scale waste.

    • How does the system control color consistency during printing?

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    • What is the accuracy of registration inspection?

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      The system detects color-to-color registration accuracy within 0.1 mm. It can also check alignment at all four corners, monitor skew errors, verify plate mounting during setup, and inspect front-to-back registration. This ensures that both initial setup and ongoing production meet high-precision alignment standards.

    • Is the system difficult to operate?

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      No. The system is designed for ease of use, featuring one-click modeling and one-click parameter switching. Operators can learn basic operations in less than 10 minutes, making the system user-friendly and efficient to run in daily production.

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