2018 International Forest Industries IFI Feb March 2018 Digital | Page 41

In most cases, the top and bottom boards are edged
with a separate edging unit following the ripsaw.
Recent installations of HewSaw single pass lines are
in Finland, Sweden, France, Russia, Estonia, Belarus,
Canada, USA, Uruguay, Brazil, Vietnam and South
Africa. Depending on log size, many of today’s single
pass machines operate at speeds of up to 200 metres/
minute (650 ft/minute) with some small log lines
producing just a single or two piece solution running at
speeds of over 300 metres/minute (1,000 ft/minute).
Engineering and dx sawing
HewSaw has over 200 employees worldwide including
about 170 people at the factory and corporate office
in Mäntyharju, Finland. This includes the company’s
in-house engineering team of 10 people who spend
their days developing new products and product
improvements for existing machines.
One of the latest advances from the engineering
department is the HewSaw dx sawing process, which
replaces HewSaw’s standard double arbour sawing
technique with a four arbour system. With dx sawing,
the first set of arbours will house the saws for an initial
or pilot cut into the cant, while the second set of
arbours will house a set of saws that finishes the cut.
“When we equip our HewSaw sawing machines and
sawlines with this patent pending technology, we can
provide our customers with the ability to run larger
diameter logs at faster speeds for longer periods of
time, and we can reduce our saw kerf, increasing
recovery and yield from each log,” explains HewSaw’s
Chief Engineer, Raimo Karjalainen.
around the world, HewSaw is there to keep machines
operating at maximum potential. In addition to
offering regular servicing and updates, HewSaw now
offers a preventive maintenance program. Based
on maintenance systems developed for the aircraft
industry, Swedish company Wiser System AB has
developed the preventative maintenance program,
or MP for HewSaw.
Wiser’s Managing Director Erik Kron asks, “What
is the difference between an aircraft and a HewSaw
sawing machine?” He answers his own question: “Not
very much. They both consist of a large number of
components in a metal frame requiring structured
maintenance. So why not use the same maintenance
methodology as the World’s most reliable machinery,”
he concludes, adding, “after all, who wants an
unplanned stop in an aircraft.”
The key element in the HewSaw MP is to be proactive
instead of reactive with centralized maintenance
planning helping to avoid unplanned emergency repairs
and component damage. HewSaw MP works by
collecting data on a regular basis from participating
sawmills and then predicting when parts will fail and
replacing them prior to failure.
For more information on HewSaw and our
products and services, visit us at:
www.hewsaw.com
After Sales and HewSaw MP
For HewSaw’s customers, the HewSaw commitment
doesn’t end when the machine leaves the
factory. With an in-house team
of technicians and service
personnel operating
The HewSaw
SL250 4.4 is the company’s
latest sawline and includes dx
sawing to maximize recovery and
throughput. The SL250 lines can process
up to eight edged sideboards from each log,
eliminating the need for downstream edging.
www.hewsaw.com