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 The
leading global technology for rotation and top centering....
The basis for high yield is that the log is
rotated and top centred as precisely as possible before the log saw. Independent tests show that the ARI Automatic Log
Rotator has a precision that is much higher than other automatic log rotating machines on
the market. The rotation precision is actually so high that it matches the precision
of today's modern optimising systems. Only ARI has attained this standard.
The advantages are great, both in terms of
costs and work environment. How great they can be for you will be demonstrated by
the test results we present below.
Master Class Rotation Precision
As these illustrations show, the Ari Automatic Log Rotator has a completely
superior capability in rotating the logs exactly according to the measuring system's
instructions.
The Ari Automatic Log Rotator
A test conducted on the Ari Automatic Log Rotator demonstrates that the standard error can
be measured at 0.33º from the ideal log rotation, with a deviation within ±3.87º.
The precision is created by the unique log rotating device which firmly grabs hold of the
log and quickly turns it to the right position, regardless if the log is smooth, crooked
or knotty where it is grabbed.
Conventional Automatic Log Rotator
A saw cut within ±20º from the ideal angle, with a standard error of 5º, is the normal
precision for conventional computerised automatic log rotators which use tilting rollers
for turning. The log's surface, with knots and other imperfections, in conjunction
with skidding of the rollers, are the primary factors causing the lower precision.
Manual Rotation
An alert and experienced person who manually rotates with the assistance of tilting
rollers succeeds in decreasing the saw cut within ±45º from the ideal level. Logs which
are very crooked are better handled individually by workers than by conventional log
rotators since the operator can compensate for skidding of the rollers. It is the
almost straight logs which cause problems and which influence the yield.
(The green line in the figure represents the optimum
saw cut).
During the log rotation test, the sweep on the logs was
measured in a log scanner, the conveyor was stopped, and the log's vertical line was
marked with a pen directly on the log end. After the cutting, the deviation from the
log's scanner stated angle was calculated. Approximately 50 logs were tested.
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