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Wide Web Inspection System | OBSERVER 4000M, OVERSEER 100 & 200 Comparison
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Wide Web Inspection System
Wide Web Inspection System
Real-Time Print Quality Control
for Wide Web Production Lines
SICHANGO wide web inspection systems deliver 100% continuous defect detection across the full web width — up to 4,000 mm at 600 m/min. Choose from three platforms engineered for mainstream, high-end, and large-FoV printing environments.
Platform Specifications
4,000 mm
Max web width — all models
600 m/min
Maximum line speed
1600×900
Sensor resolution, all platforms
30X
Max optical zoom — OVERSEER 200
200×120 mm
Largest field of view — OVERSEER 200
4,000 mm
Max web width — all three models
1600×900
Sensor resolution across all platforms
30X
Maximum optical zoom — OVERSEER 200
200×120 mm
Largest field of view — OVERSEER 200
Overview
What Is a Wide Web Inspection System?
A wide web inspection system is a high-speed camera-based quality control platform mounted directly on printing and converting lines. It captures stabilized, high-resolution images of fast-moving printed webs — converting motion into clear still-images that operators can analyze in real time, at full production speed.
The "web" is the continuous sheet of material traveling through the press — film, foil, paper, or nonwovens. Wide web systems must cover the complete cross-web width without gaps, detecting surface defects, print errors, color deviations, and registration issues before material advances to downstream processes.
Without inline inspection, defects are typically discovered after the roll is complete — leading to full-roll rejection, raw material waste, and customer complaints. SICHANGO wide web inspection systems eliminate these failure points through continuous 100% coverage, automatic alerting, and position-accurate defect logging at every meter of production.
Compatible Press Types
Flexographic, gravure, offset, digital, hybrid, laminating, coating, and slitting lines
Trusted on Global Press Brands
BOBST, Windmöller & Hölscher, Mark Andy, Gallus, Nilpeter, OMET, UTECO, Weigang
Installed in 30+ Countries
SICHANGO systems serve label converters, flexible packaging producers, and specialty printers worldwide
Retrofit & New Press Installation
Custom mounting brackets and rail systems available for existing machines of any brand
Product Line
Three Platforms. One Web Width.
All three SICHANGO wide web inspection systems support up to 4,000 mm web width with 1600×900 sensor resolution. The difference lies in field of view, optical zoom, movement type, and software feature depth — each matched to a specific production environment.
SICHANGO
OBSERVER 4000M
Mainstream Printing Monitor
| Max web width | 4,000 mm |
| Field of View | 100 × 75 mm |
| Sensor resolution | 1600 × 900 |
| Optical lens | 10X |
| Movement | Manual & Motorized |
| Keypad | On camera / Remote |
| Back strobe | Yes |
| Dual camera | Yes |
OVERSEER
100
High-End Overseer Controller
| Max web width | 4,000 mm |
| Field of View | 100 × 75 mm |
| Sensor resolution | 1600 × 900 |
| Optical lens | 10X |
| Movement | Motorized |
| Keypad | Remote keypad |
| Back strobe | Manual & Motorized |
| Dual camera | Yes |
OVERSEER
200
High-End Large FoV Monitor
| Max web width | 4,000 mm |
| Field of View | 200 × 120 mm |
| Sensor resolution | 1600 × 900 |
| Optical lens | 30X |
| Movement | Motorized |
| Keypad | Remote keypad |
| Back strobe | Motorized |
| Dual camera | Yes |
Full Comparison
System & Software Configuration Matrix
Complete feature breakdown — system hardware and software capabilities for all three platforms side by side, directly from the SICHANGO product specification sheet.
| Feature | OBSERVER 4000M | OVERSEER 100 | OVERSEER 200 |
|---|---|---|---|
| System Configuration | |||
| Max web width | 4,000 mm | 4,000 mm | 4,000 mm |
| Field of View (FoV) | 100 × 75 mm | 100 × 75 mm | 200 × 120 mm |
| Sensor resolution | 1600 × 900 | 1600 × 900 | 1600 × 900 |
| Optical lens | 10X | 10X | 30X |
| Movement | Manual & Motorized | Motorized | Motorized |
| Keypad | On camera / Remote | Remote keypad | Remote keypad |
| Mouse control | — | ✓ | ✓ |
| Touch monitor | — | ✓ | ✓ |
| Dual camera | ✓ | ✓ | ✓ |
| Dual monitor | — | ✓ | ✓ |
| Back strobe | ✓ | Manual & Motorized | Motorized |
| Software Configuration | |||
| Split view | ✓ | ✓ | ✓ |
| Rotate | ✓ | ✓ | ✓ |
| CMYK / RGB Value monitoring | ✓ | ✓ | ✓ |
| White Balance | ✓ | ✓ | ✓ |
| Position Memory | ✓ | ✓ | ✓ |
| Job Save | — | ✓ | ✓ |
| PPS (Print Position Storage) | — | ✓ | ✓ |
| ACS (Auto Scan / Panoramic) | — | ✓ | ✓ |
PPS & ACS — What They Mean in Production PPS (Print Position Storage) saves camera positions, inspection windows, and CMYK tolerance values per job — so repeat orders load with zero recalibration. ACS (Auto Colour Scan) automatically sweeps the camera across the X or Y axis to generate a complete panoramic image of the full print layout at production speed — enabling layout verification and defect mapping without stopping the press.
System Architecture
How a Wide Web Inspection System Works
From illumination through sensor capture, pre-processing, CMYK classification, and operator output — every stage must operate within a tight latency budget to maintain defect position accuracy at line speed.
Fig. 1 — Functional signal flow of a SICHANGO wide web inspection system. Speed-sync pixel clocking ensures spatial resolution consistency regardless of web speed variation throughout the shift.
Defect Classification
What Can Wide Web Inspection Systems Detect?
SICHANGO wide web inspection systems identify defects across eight primary categories — continuously, at full production speed, across the complete web width.
Pinholes & Voids
Sub-millimeter openings in film or foil. Critical for barrier packaging integrity and pharmaceutical compliance.
Streaks & Scratches
Longitudinal marks from roller contamination, die lip buildup, or substrate tension variation during production.
Print Misregistration
Cross-web or machine-direction shift of color planes beyond tolerance — detected per color separation in real time.
Coating Voids
Uncoated patches in barrier, adhesive, or functional coating layers on flexible packaging substrates.
Color Deviation
Delta-E out-of-tolerance zones measured via CMYK/RGB value monitoring against a stored reference target.
Wrinkles & Creases
Surface deformation on film or foil webs detected through structured illumination contrast and back strobe mode.
Inclusions & Gels
Foreign particles or unmelted resin embedded in extruded film — visible in both transmitted and reflected light.
Edge Defects
Fraying, curl, or tearing at web edges indicating tension control or slitting process issues requiring operator attention.
Balancing False Positives vs. False Negatives
Every wide web inspection system must manage two failure modes: false positives — flagging good material and reducing OEE — and false negatives — passing a real defect to the customer. In pharmaceutical packaging, a missed defect carries regulatory liability. In high-volume label production, excessive false alarms destroy throughput. Detection thresholds must be configured asymmetrically per application and defect class.
Optical Engineering
Uniform Illumination Across 4,000 mm
Achieving consistent illuminance across a 4-meter web width is a core optical challenge. The segmented LED architecture in SICHANGO systems maintains illuminance variation below 3% end-to-end — ensuring equal defect detection sensitivity at web edges and center alike.
Fig. 2 — Cross-web illuminance uniformity comparison for three illumination architectures across 4,000 mm. SICHANGO's segmented LED design achieves <3% variation, ensuring equal sensitivity at both web edges and center.
Integration Process
From Installation to Qualified Production
Commissioning a wide web inspection system is a calibration process — not simply a hardware installation. Follow these five stages to reach reliable production-ready detection.
1
Mechanical Integration & Sensor Positioning
Mount the camera bar perpendicular to the web with the field of view centered on the production area. OBSERVER 4000M supports manual or motorized positioning. OVERSEER 100 and 200 offer full motorized movement via remote keypad — enabling repositioning without press stoppage. Verify the FoV covers the full web width with a 5–10% margin on each edge.
2
Illumination Setup & White Balance Calibration
Run the web at production speed with a calibration-grade white reference substrate. Execute white balance calibration to normalize sensor sensitivity across the full 1600×900 field. Position Memory on all three platforms stores this calibration state per job for fast retrieval on repeat orders.
3
Reference Acquisition & PPS Job Storage
Capture a multi-meter reference of defect-free production material at production speed. Define CMYK/RGB tolerance windows and spatial inspection regions. Use PPS (Print Position Storage) on OVERSEER 100 and 200 to save all parameters — camera positions, ROI regions, and tolerance values — for instant recall on repeat orders.
4
ACS Panoramic Scan & Coverage Verification
On OVERSEER 100 and 200, run an ACS (Auto Colour Scan) to generate a full panoramic image of the print layout across the complete web width. Use this to verify detection coverage, identify inspection window gaps, and perform a first-run layout check — all at production speed without stopping the press.
5
Operator Validation & Alert Integration
Introduce known-defect reference samples and confirm that alerts trigger at the correct cross-web and machine-direction position. On touch-monitor systems (OVERSEER 100, 200), validate the GUI-driven operator workflow. Verify that split-view and dual-camera outputs display correctly on the production floor monitor before releasing the system to full production.
Return on Investment
Where the Value Comes From
For flexible packaging and label converters running 3-shift operations, SICHANGO wide web inspection system installations typically achieve payback within 14–22 months.
The dominant driver is early-detection roll rejection. Catching a process excursion at meter 150 of a roll — rather than at the end-of-line slitter — saves the entire downstream value added to that material: converting labor, ink, energy, and machine time.
Material waste reduction consistently ranks as the single largest value driver, accounting for 42% of total ROI across packaging and label converter deployments.
Customer Complaint Elimination
Beyond material savings, the second-largest ROI driver is the elimination of customer complaints — which carry compounding costs: credit notes, rush reprints, freight, account relationship damage, and potential loss of future orders.
Industry Applications
Which Industries Use Wide Web Inspection?
SICHANGO wide web inspection systems are deployed across flexible packaging, label, pharmaceutical, nonwovens, and specialty printing — wherever print quality and material integrity are business-critical.
Flexible Packaging Film
OBSERVER 4000MExtrusion and printing lines for polyolefin film, laminates, and high-barrier packaging substrates.
Key detection: gels, pinholes, streaks, coating voids
Flexographic Print Lines
OVERSEER 100 / 200Real-time print quality monitoring on flexo and gravure presses for flexible packaging and cartons.
Key detection: misregister, hickeys, ink density, color delta-E
Label & Narrow Web Printing
OVERSEER 100Pressure-sensitive labels, shrink sleeves, and in-mold label production at high line speeds.
Key detection: die cut registration, barcode clarity, ink coverage
Nonwovens & Hygiene Products
OVERSEER 200Spunbond and meltblown fabric lines for personal care, hygiene, and medical substrate inspection.
Key detection: holes, thin spots, bond pattern uniformity
Pharmaceutical Packaging
OBSERVER 4000MBlister foil, leaflet, and carton inspection with position-accurate defect logging and traceability.
Key detection: text legibility, code clarity, seal integrity
Coated Release Liner
OBSERVER 4000MSilicone-coated release liner and pressure-sensitive adhesive web inspection in transmitted light mode.
Key detection: coating voids, streaks, adhesive gaps
Technical Depth
What Sets SICHANGO Apart from Standard Web Viewers
Traditional web viewers display video — they don't compare, classify, or alert. SICHANGO wide web inspection systems deliver three capabilities that matter in daily production.
01
Real-Time CMYK & RGB Value Monitoring
All three platforms continuously measure CMYK and RGB values across the live image — not just recording video. Deviations trigger immediate operator alerts without waiting for an offline color check after the roll is complete. This is the difference between catching a shade shift at meter 80 versus discovering it during inspection at the slitter.
02
PPS Job Memory — Zero Recalibration on Repeat Orders
Print Position Storage (PPS) captures camera coordinates, ROI regions, and all inspection parameters per job. When the same print order runs again, one recall loads everything instantly. For converters with high repeat-order volumes — label, flexible packaging, folding carton — this single feature can deliver measurable changeover time reduction per job.
03
ACS Full-Web Panoramic Imaging
Auto Colour Scan (ACS) on OVERSEER 100 and 200 generates a complete panoramic image of the full printed layout by following a defined horizontal or vertical scan sequence — at production speed, without stopping the press. This gives operators a full-layout view for defect mapping, job setup verification, and artwork comparison that spot checks simply cannot provide.
Evaluation Recommendation
When selecting a wide web inspection system, always request a live demonstration using your own substrate and print job — not a vendor's demonstration substrate. The gap between laboratory-condition sensitivity and reliable detection at your production speed with your actual material is where many system selections go wrong. SICHANGO supports pre-sales evaluation trials using customer-supplied materials.
Selection Guide
Which Platform Is Right for Your Line?
All three systems support 4,000 mm web width and 1600×900 sensor resolution. The right choice depends on field of view, zoom requirement, movement preference, and software feature depth.
SICHANGO
OBSERVER 4000M
The mainstream choice for converters who need both manual and motorized positioning flexibility. 100×75 mm FoV with 10X optics covers a wide range of repeat lengths and substrate types. Back strobe support enables transparent film inspection. The practical entry point into the SICHANGO ecosystem for flexo and gravure print lines of any width.
OVERSEER
100
Full motorized operation with remote keypad, touch monitor, and the complete software suite including Job Save, PPS, and ACS. Shares the 100×75 mm / 10X optical format with the OBSERVER 4000M but adds GUI-driven workflow, mouse control, and optional dual-monitor output. Best for high-end production environments where repeat-order efficiency and operator workflow quality are priorities.
OVERSEER
200
The largest field of view in the range — 200×120 mm with 30X optics — for high-end print lines with wide repeat lengths, long-range HD transport requirements, or distortion auto-adjustment needs. Motorized back strobe, full software feature parity with OVERSEER 100. The premium choice for specialty packaging, wide-format labels, and applications demanding maximum inspection coverage per camera position.
FAQ
Frequently Asked Questions
What is the maximum web speed supported by SICHANGO wide web inspection systems?+
All SICHANGO wide web inspection systems support production speeds up to 600 m/min, depending on the printing press configuration and the selected camera setup. The speed-sync encoder integration maintains detection accuracy across the full speed range.
What is the difference between PPS and ACS?+
PPS (Print Position Storage) saves camera positions, inspection regions, and CMYK tolerance settings per print job — enabling instant setup recall on repeat orders with zero recalibration. ACS (Auto Colour Scan) automatically sweeps the camera across the web to generate a full panoramic image of the entire print layout, used for layout verification and comprehensive defect mapping.
Can SICHANGO systems be installed on existing printing machines?+
Yes. SICHANGO offers retrofit installation with custom mounting brackets and rail systems for a wide range of existing press brands including BOBST, Mark Andy, Gallus, Nilpeter, OMET, UTECO, Windmöller & Hölscher, and Weigang. Remote technical support and on-site commissioning are available globally.
Which model supports transparent film inspection?+
The OBSERVER 4000M includes back strobe support, enabling transmitted light inspection mode for transparent film, silicone-coated release liner, and other substrates where reflected-only illumination is insufficient. The OVERSEER 100 supports both manual and motorized back strobe; the OVERSEER 200 includes motorized back strobe as standard.
What is the field of view difference between OVERSEER 100 and OVERSEER 200?+
The OVERSEER 100 delivers a 100×75 mm field of view with a 10X optical lens — the same optical format as the OBSERVER 4000M. The OVERSEER 200 provides a significantly larger 200×120 mm field of view with a 30X optical lens, making it suited for wide repeat-length print jobs or applications requiring maximum inspection area per camera position without mechanical repositioning.
Is dual-camera support available across all models?+
Yes. All three SICHANGO wide web inspection systems — OBSERVER 4000M, OVERSEER 100, and OVERSEER 200 — support dual-camera synchronized inspection. Dual-camera configurations are used for simultaneous top and bottom surface inspection, front and back print registration comparison, or wide-web split monitoring of two production lanes.
Ready to Eliminate Print Defects on Your Wide Web Line?
Talk to a SICHANGO inspection specialist. We'll identify the right platform for your press, substrate, and defect requirements — and can arrange a live evaluation trial with your own production materials.
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