USNR's LHG is the industry's leading automated grading solution for lineal planer mill applications. Since its inception nearly 10 years ago the LHG has evolved with changing technologies and changing market demands. The Lineal High Grader continues to break new ground with an expanding repertoire of features and functions for the most advanced lineal planer mill grading available.

Some of the LHG's latest features include:

• 250,000 board tracking capability. Mills have more time to do random quality control checks. Mill personnel can pull a pack directly from the sorter, or take a finished pack apart to check it
• Marginal grade logic, per board. The LHG's spot-on accuracy can result in some boards that have just under the allowable limit of defect. The marginal grade logic feature allows the mill to manage the appearance of the boards in each pack to meet customers' expectations.
• Hi/Low grade, per pack. The mill can manage the percentage of low grade boards in each pack to meet the expectations of its customers and end users of the products.
• Interface with an external moisture meter. The mill can manage the percentage of moisture in each pack. With greater control, it can balance allowable moisture content with the needs and wants of its customers.
• Split/shake merging, per grade. This feature allows mills to configure, per grade, the amount of fiber between shakes to manage the appearance of the board to meet customers' expectations.

The LHG accommodates a wide range of species and defects, and is operating in many regions worldwide.

To detect, measure and classify some defects such as a variety of types of knots, the LHG utilizes x-ray technology. Density data collected from the x-ray sensors helps the LHG accurately determine the location, size and displacement of knots.

LHG combines the x-ray density data with vision technology to enhance the accuracy of optimization for edge knots.

Adding top and bottom vision sensors to collect data on the wide faces of the boards enables the LHG to automatically grade for other defects such as blue stain, rot, splits and check.

A pull-out sensor module and full height doors on the infeed, outfeed and rear provide excellent access to all components for maintenance. The small footprint of the LHG makes it well suited for retrofits.