2018 International Forest Industries IFI Feb March 2018 Digital | Page 40

This HewSaw R200 1.1 single pass machine operates north
of the Arctic Circle and processes over 50 logs per minute,
depending on diameter. Inset: One operator manages the
mill flow from the log infeed, including the debarker, to the
HewSaw outfeed.
then turned before going through the ripsaw where
up to two more edged sideboards can be removed
from each side. Finally a CRS or cross saw can further
process the centre stack if required. Board separators
at both the cant saw and the ripsaw transport the
edged sideboards to conveyors running parallel to the
HewSaw with all products ending up on a landing table
before going through a trimmer, sorter and stacker.
The Vilppula and IFG lines are similar to other SL250
lines that have recently been installed in Russia,
Australia, France and Scotland along with some older
sawlines installed throughout HewSaw’s market areas.
Single Pass Machines
It’s not just sawlines that benefit from HewSaw’s latest
technology and quality workmanship. The company’s
single pass machines, which handle all functions in one
machine, are also recognized for their build quality,
durability and production capabilities.
The single pass machines, known as the HewSaw
R200 and HewSaw R250 are workhorses capable
of operating in either Scan-n-set, batch fed, or a
hybrid between the two modes. There are HewSaw
single pass machines in close to 35 countries on six
continents and they can take logs up to 50 cm (20 in.)
in diameter, depending on which model is selected.
“The single pass machine is where we got our start,”
explains Tuomas. “We are a family-run business and
over 50 years ago our fathers and grandfathers started
building these smaller HewSaws. So far, we have built
close to 400 of these machines and they are still a top
seller for us.”
Most single pass machines today are downstream from
a v-flight conveyor equipped with 3-D or True Shape
scanner. A highly accurate rotary log turner takes the
scan information and rotates the log to the best
position for the HewSaw based on parameters set
by the mill. Following the four-sided chipping process,
the cant is further processed through a double vertical
arbour ripsaw equipped with pre-built saw clusters.