FITTING
BANDSA
W
BLADE
S (Continued)
TRACKING -Fig. 9.
Every
saw
has
slightly
different
running
characteristics
on a
band
saw
machine
due to the condition of the
steel
ribbon
it
is
made
from,
the
brazed
joint
and
the
tension
in the
blade
ribbon.
This
is
compensated
by
using
a
crowned
(O,r
slightly
curved)
rubber
on the
wheels
and
prov-
•
iding the top wheel with a
slight
tilting movement.
We
call
this
track-
\
ing
and
by
slackening
the
lock
handle
and
adjusting
the
tracking
hand-
wheel,
it
is
possible
to
adjust
the
tilt
of the top wheel,
so
that the
saw
runs
steadily
in the
centre
of the wheel.
This
is
important
because
the
blade
then
passes
in a
straight
line
between the top and bottom
wheel, and does not snake. When the
latter
occurs
the
back
of the
saw,
keeps
hitting the guide
plate
and
woodwork and damaged guides
result.
Do
not
forget
to
re-tighten
the
tracking
lock
bolt
after
adjusting.
SAW
PULLEYS
A
brush
as
shown
in
Fig. 10
is
provided
on the
bottom
pulley to
remove
sawdust,
whilst
the
rubber
on the top
pulley
should be cleaneq daily to
prevent
accumulation
of
sawdust
which would
cause
the
blades
to
run
out
of
true
line.
.
The
saw
pulleys
must
be
kept
in
accurate
balance
to avoid
vibration.
It
is
essential
that
the
rubbers
on the
faces
of the
pulleys
are
kept
at
an
even
thickness
by
truing
up
occasionally
or
if
they
are
badly
worn
should
be
replaced
by new
ones.
If
the
machine
is
used
with badly
worn
pulleys
the
saw
will
vibrate,
resulting
in
bad
sawing and
broken
saws.
We
have a
service
arrangement
which we
recommend
whereby newly
rubbered
pulleys
can
be
supplied
against
the
return
of the
existing
pulleys,
an
appropriate
charge
being
made
to
cover
re-rubbering
only.
Where
it
is
not pra.ctical
for
the
customer
to
use
our
exchange
service
of
vulcanised
wheels
it
is
possible
for
the
customer
to
carry
out
his
ownre-rubbering,
which,
whilst
not
so
good
as
the
vulcanised
process,
is
satisfactory
if
the
instructions
below
are
carefully
followed. Rubber
bands
and
fixing
solution
can
be
supplied to
order.
Page
8
fC!r
tr::acking saw
Brush
Fig.~
Fig. 10
