24 DoALL INSTRUCTION MANUAL
TRACKING
AND
TENSIONING
THE
FILE
BAND
The file bands
are
properly aligned
on
the
wheels in the
same
manner
as
used in track-
ing the
saw
bands.
The band
can
be made
to
run
on
the
crown
of the wheel by turning the handwheel
located
at
the
center
of the upper wheel.
A
clockwise rotation of the tilting
screw
will
make the band
run
to
the inside. The file
band should
run
freely in the file guide
channel when properly tracked. A
Tracking the file band
on
the 3 6-3 machine
when
set
up for three wheel operation is
accomplished by adjusting with the hand-
wheel
at
the
center
of the
rear
idler wheel.
Adjust the tension of the file band
so
that
it
is snug, by turning the tension handwheel
until
it
just begins
to
resist turning. Too
much tension
on
the file band may
cause
the
file segment rivets
to
break when heavy filing
pressure is‘ applied. While
at
first
it
might
seem
that with
excess
tightening of the file
band better filing results
are
obtained, this
is
not
the
case.
Most
accurate
filing
can
be
obtained ‘with the band
at
a
light tension.
Check the file band
to
see
that
it
is
in
alignment and passing freely
over
the channel
in the file guide. This
can
be checked by
hand
movement
of the upper wheel. Then
start up the
motor
and shift the machine into
low gear,
so
that the band will
run
slowly
while
it
is properly" tracked
on
the wheels.
FILING
Work pressure
on
the file band should
not
be excessive. Light pressure
on
all filing gives
a
better finish and files just
as
quickly. Heavy
pressure may
cause
the file band
to
break
or
stall, resulting in
a
grooved lower wheel tire.
It
may also prevent the file from cutting be-
cause
its tooth gullets will clog.
The
correct
combination of speed and
pressure will produce curled chips. The best
filing speeds
are
between 59 and 100 feet
per minute. Use the job Selector Dial for
complete information
on
filing speeds.
Keep the files clean. Do
not
file when the
teeth
are
clogged. Loaded files
cause
bumpy
filing and scratch the work. Excessive filing
pressures, when the file segments
are
clogged
with chips, will
cause
the file teeth
to
strip
out, damaging the band. Use
a
file card
to
clean the band before returning
any
file band
to
the storage cabinet.
To facilitate this carding,
start
the
motor
and
set
the DOALL running
at
its slowest
speed. Then shift the machine into neutral
position
to
release the transmission
so
that
the file band can be easily hand moved in
locating clogged spots.
REMOVING THE FILE
BAND
To
remove
the file band from the machine
release the tension
on
the file band by lower-
ing the upper wheel, and slip
it
off the wheels.
It
can
be stored in
a
coil; but do
not
coil
it
‘
into
more
than three loops. By far the best
means
of storing file bands is
in
the DOALL
Supply Cabinet. Here the bands
are
looped
over
in
a
16" radius and the ends hang in
a
compartment. Thus, they
are
kept clean and
are
not
likely
to
be kinked. Another satis-
factory
means
for storing the bands is
to
suspend them vertically from
a
pin which
fits through the tail gate rivet hole.
To unjoin the band after
it
has been
removed from the wheels, proceed
as
follows:
1. Hold band
at
joint with both hands,
To Next Page
Loading...
