Profile and edge inspection on wooden products using LED backlighting

The woodworking industry requires pinpoint precision. Whether producing kitchen doors, windows, or furniture components, checking wood profiles is a complex technical challenge due to the irregular and fibrous nature of the material. LED backlighting is the standard solution for those seeking maximum accuracy in edge measurement.

The advantage of sharp contrast

Wood, by its very nature, features grain and color variations that can confuse traditional vision systems that rely on reflected light. Using LED backlighting, the machine vision system ignores the surface texture and focuses exclusively on the perimeter of the object. This is essential for:

1. Milling check: Make sure the cut profile matches the CAD drawing perfectly.
2. Chip Detection: Identify defects along the edges that may make the piece unsuitable for painting.
3. Orthogonality check: Make sure the corners are perfectly square.

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Precision and repeatability

The use of high-quality LEDs ensures uniform lighting across the entire inspection area. This is crucial when working with large wooden objects, such as cabinet doors. A well-sized backlight avoids light distortion at the edges of the image, allowing the vision software to extract profile coordinates with extreme repeatability.

A step towards Automation 4.0

Implementing backlight profile control means digitizing quality. Each part is measured in fractions of a second, allowing for complete production traceability and a drastic reduction in manual grinding operations.

Products and Technologies

• BL3 Series — LED backlight illuminators for medium and large inspection fields
• BL4 Series — high-brightness LED backlight illuminators
• BL2 Series — LED backlight illuminators for machine vision
• BL1 Series — compact LED backlight illuminators