THG DIFFERENTIATORS – COMPARISON SHOPPING
End grain scanner
The THG utilizes an end grain scanner positioned at the lumber line that scans the end of each board. It provides the THG with information about which part of the log the board originated from, allowing the THG to determine the location of the pith relative to the board. The ability to determine pith location ensures much more accurate knot sizing than any system that lacks this capability. The end grain scanner assists the THG to determine the size and shape of knots, and their connectivity within the board. The 3D illustration below shows the THG’s model of the inside of a board; knots are depicted in purple, laser dots in green, and the log’s pith (red, yellow) which is located outside of this board. The THG is able to measure the shape of the knots and their volume displacement of wood inside the board, which affects the board’s grade. Note that the knots converge toward the pith. The image above shows laser dots arrayed on two surfaces of the board from the top and bottom rows of BioLuma 2900LVG+ sensors. Also note the narrow belts (approximately 1” wide) that transport the boards through the scan zone.
Planer
Full 4-face scanning with 2 rows of sensors
USNR’s integrated, multi-technology scanning system (BioLuma sensors) allows the sensors to be turned off-axis, and scan two faces of the board with each row of sensors. This configuration accomplishes full four-face scanning with only two rows of sensors. This is one of the key attributes of a simple design, making the scanning system easier to calibrate and easier t ???????????Q??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????Q????????????????????????????????????????????????????????????????????????????????????????????????????????????()Q???????????????????????Q! ?e???????????????????????????????????????????????????????????????????????????????????e???????????????????????????????????????????????((??()5???????%???????%MMU???????????????????((0