# Surface Defect Detection > Surface defect detection identifies holes, tears, voids, contamination, and other quality issues on moving webs in real time. Roll-2-Roll Technologies provides high-resolution sensors that detect defects as small as 1mm at line speeds up to 500 m/min—preventing defective material from reaching cu... **Last updated:** 2026-03-03 **Source:** https://r2r.tech/solutions/defect-detection --- Surface defect detection identifies holes, tears, voids, contamination, and other quality issues on moving webs in real time. Roll-2-Roll Technologies provides high-resolution sensors that detect defects as small as 1mm at line speeds up to 500 m/min—preventing defective material from reaching customers and enabling immediate process corrections. Unlike manual inspection or end-of-line quality checks, our sensors provide 100% inspection coverage, catching defects the moment they occur. ## The Challenge: Defects Discovered Too Late Traditional quality control methods create costly delays and customer rejections: - End-of-Line Inspection: Manual inspection after winding means defective material has already been produced—requiring expensive rework or scrap. - Sample-Based QC: Inspecting only samples (e.g., every 10th roll) allows defective rolls to ship undetected. - Operator Fatigue: Human inspectors miss defects during long shifts, especially on high-speed lines or repetitive patterns. - No Process Feedback: Without real-time defect detection, operators cannot correlate defects with process parameters to identify root causes. --- ## The Solution: Automated 100% Web Inspection Roll-2-Roll defect detection sensors scan the full width of the web continuously, identifying defects in real time and triggering automatic responses. ### How It Works 1. Full-Width Scanning: Line scan sensors with viewing areas up to 960mm inspect 100% of the web surface 2. Defect Classification: Advanced algorithms distinguish between holes, tears, contamination, and coating voids 3. Size & Location Mapping: Each defect is measured and its location logged with timestamp and web position 4. Automatic Actions: When defects are detected, the system can trigger alarms, reject mechanisms, or stop the line **Key Advantage:** Real-time detection enables immediate process corrections—preventing continuous production of defective material that traditional end-of-line inspection cannot stop. --- ## Key Benefits - 100% Inspection Coverage: Every centimeter of web is inspected—no sampling, no gaps - Real-Time Process Feedback: Defects detected instantly, allowing operators to correct process parameters immediately - Prevent Customer Rejections: Defective material is identified and removed before shipping - Data-Driven Quality Improvement: Defect logs enable root cause analysis and continuous improvement - Eliminate Operator Fatigue: Automated inspection provides consistent quality monitoring regardless of shift length --- ## Applications by Industry - Battery Manufacturing — Detect holes, tears, and coating voids in electrode films that create cell safety hazards. - Nonwovens & Hygiene — Identify tears and holes in diaper topsheets and backsheets before assembly. - Flexible Packaging — Detect pinholes and contamination in barrier films that compromise package integrity. - Medical Device Manufacturing — Ensure defect-free materials enter sterile packaging lines (FDA compliance). - Film Extrusion — Detect gels, contamination, and thickness variations in real time during production. --- ## Related Solutions - Splice Detection — Detect splices and joints - Flag Detection — Identify defect flags and markers - Edge Detection — Monitor web position --- ## About Roll-2-Roll Technologies Roll-2-Roll Technologies LLC, headquartered in Stillwater, Oklahoma, manufactures patented fiber-optic web position sensors and web guiding systems for roll-to-roll manufacturing. Products include ODC edge sensors (48mm to 960mm), 1DC all-in-one sensors, SCU-series controllers, and complete web guide systems. - Website: https://r2r.tech - Phone: +1 (888) 290-3215 - Email: sales@r2r.tech