Operation Manual

--
--I
Cause:
Remedy:
Thread
breaking
may
occur
for
any
of
See
preceding
page.
tne
aforementioned
reasons,
Tnreod
tension
too
rign:.
Adjust
upper
and
lower
tensions
r
accordance
with
Sections
10
and
11
Use
of
inferior
or
knotty
tnrecd.
Oty first-rate
sewing
machine
thread
or
a
good quaiity
of
silk should
be
usec.
Race
dry
or
000 threads
jamming
in
Clean
cnd oil race
in
accordance
witn
the
race
Sections
18 ano
19.
Binding
of
Machine
Cause:
Remedy:
Driving
belt
too
long
and
slips
o.
Shorten
belt or
inser
a
oiece
for
or
too
short
causing
excessive
pressure
lengthening.
Cut
the
oelt straigrit,
not
on
the
bearings.
on
he
DiCS.
Shuttle
race
dry
or
aostructed
by
odd
Cean
and
oil
snuttle
race.
thread.
Mecrianism
clogged
up
oy
inferior
oi 1 .
Use
only
PFAFF
sewing
macnine
oil.
never
salad
Oil
or
glycerine.
The
feed
dog
jams in
the
needle
plate
cutout.
and
readjust properly.
Winder
engaged
while
sewing.
Disengage
winder.
Thread
snarled
up
between
oclance Remove
and
unwind
thread
with
the
wneel
and
bushing.
aid
of
a
thin needle.
Needle
Breakage
30
Cause:
Remedy:
Needle
bent
and
struck
by
the
point
Replace
needle
at
on
of
the
shuttle.
ce
to
prevent
more
damage.
Needle
too
thin
or
thread
too
thick,
Study
Needle
and
Thread
Chart
on
page
4.
Needle
threaa
tension
too
right,
thus
Either
ease
tension
or
use
a
thicker
needle.
oending
needle.
Needle
Dent
aria
strikes
needle
plate
Do
not
force
the
feeding
motion.
cue
to
the
material
oeing
pulled
or
pusned.
cease
pressure
on thicker
materict
and
so
assure
better
feeding.
Boabin
case
inserted
irnDroperlv.
When
inserting
the
bobbin
case,
push
it
in
until
it
ciicks
into
position
oudioly.
31