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LINEAL HIGH GRADER

USNR's Lineal High Grader (LHG®) offers a complete and highly accurate automated grading solution. Its modular design allows mills the flexibility to choose the level of automation that suits their products and market, and easily accepts additional technologies within the same scan frame.


LHG offers accurate scanning and classification for:

- Knots (sound / unsound / bark encased)
- Stain (blue stain, heart stain)
- Splits and shake
- Cambium / shallow face wane, steep edge wane
- Planed bark as wane
- Decay (rot w/ voids, white spec, etc.)
- Pith location down the entire length of the piece
- MSR/MEL strength evaluation

Other features:

- High scan density: 0.2”
- Small footprint - 10’ in length
- True differential thickness & width measurements
- Wane equivalency, skip, warp, twist, crook, etc.
- Can be close coupled to the planer
- Capable of operating at 3000+ fpm
- Proprietary multi-channel, multi-spectral vision sensors

See also our LHG ID Printer.


LHG scans each piece in a single pass employing several sensor technologies. It compares and verifies the data from these technologies to achieve a highly accurate decision. We call this approach DataFusion.

Technologies employed include x-rays for density evaluation, lasers for geometric profile measurements, and 4-sided multi-channel vision to detect visual characteristics. The combination of these technologies allows classification and verification of lumber defects such as knots, stain, splits and shake, wane, rot, etc. and pith location down the entire length of the piece.

The LHG also offers MSR/MEL strength classification, wane evaluation, and skip control with a high scan density in a very small footprint.

Contact a USNR Sales Representative today!



Wespine's LHG: The choice of experts

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Lineal High Grader

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