2018 International Forest Industries IFI Feb March 2018 Digital | Page 42

USNR product
solutions increase
value & recovery
Logmaster HPS bandsaw
is set to achieve world
record for speed
SAWLINES
USNR technologies
target line speed
and recoveries
simultaneously for
spectacular results
W
ood processors around
the world have common
goals when it comes to
their business. They all want to
produce the best products possible
from the raw resources available
to them, and to be profitable in the
process. With product solutions
that deliver the most value and
recovery, USNR is helping them
become the supplier of choice for
their customers.
Logmaster HPS set to become
world’s fastest bandsaw line
A new bandsaw line comprised of
three Logmaster HPS machines
installed at a mill in northern
Sweden aims to be the fastest
in the world. To date, two twin
Logmaster HPS bandsaws are
operational with the third to come
online in 2018.
The target of 155 m/minute
(500 ft/minute) feed speed is
expected to be achieved after the
next expansion stage is completed.
But precision cutting is already
setting new standards at the mill.
With two Logmaster HPS bandsaw
40 International Forest Industries | FEBRUARY / MARCH 2018
units up and running, the mill
estimates double-digit volume
increases due to improved cutting
accuracy and thinner kerf sawing,
as opposed to circular saw blades.
Logmaster HPS satisfies the
need for high-speed bandsaw
production. This design maximizes
production and performance with
its thin saw kerfs, resulting in
excellent yields. Logmaster HPS is
designed for feed speeds up to 180
m/minute (590 ft/minute) and saw
speeds up to 100 m/second (330
ft/second), with excellent product
accuracy. Supported by electronic
monitoring and self-adjusting
features, system stability and
reliability are assured. Logmaster
HPS can be delivered as a log or
cant breakdown machine, with or
without a reducer unit. It can also
be combined with profiling and
sweep sawing technology.
Bandmill monitoring system
The BMS system uses inductive
sensors that monitor the blade,
and an actuator that tilts the upper
band wheel’s vertical position. The
main advantage to using inductive
technology is the capability to
detect cracks in the blade, even
very small ones. Apart from safety
risk and damage to equipment,
blade ruptures create downtime.
One customer indicated that
the BMS investment has a very
short pay-back time, as well as
100% crack detection (zero blade
ruptures). He said that thanks to
increased up-time in the saw line,
the mill’s production has risen on
average by an impressive 1.9 m3
(800 board feet) per hour.
The BMS’ sensors are mounted
in a protective housing on the
return side of the saw blade to
actively correct the saw band’s
position on the band wheel. This
not only minimizes wear but also
improves sawing accuracy. The
BMS’ detection capability is not
reduced by sawdust build-up or
particles in the air.