| Aberdeen WA |
Anderson, CA |
| Burlington, WA |
Burney, CA |
| Lincoln, CA |
Quincy, CA July, 2011 |
| Sonora, CA Fall, 2011 |
|
GradeScan represents a quantum leap beyond simple geometric
profile scanning. GradeScan features fully-integrated color,
tracheid, geometric, and density sensors and is capable of operating at
lineal speeds above 3000 feet/minute. SPI mills have found that the system provides consistent grade optimization and
improved trim decisions. Besides the obvious advantage of adding the
biological aspect to lumber grading, GradeScan also deals with eased edges, gang saw mis-match, smooth bark,
tear-outs, mechanical gouges, and light planer skip much more accurately than a geometric scanner alone.
The scanner installs directly behind a planer,
with a footprint as small as 24 lineal inches! Warp information is collected downstream from
the scanner where boards are relaxed. GradeScan determines
trim and grade according to physical and appearance grade rules (including
knot displacement). Other than a few defects such as Timber Break and some uncommon decays,
GradeScan takes over ALL the tasks typically performed by a human grader. The final production
operation leaves one check grader in place to watch for material handling problems and provide limiting grade
and/or trim marks for the occasional defects not covered by the scanner. The Lucidyne Grade Mark Reader
provides an opportunity to incorporate a manual input into the optimizing solution as well as capturing
special symbols to assist with quality control sampling.
