'Whipstitch
buttonholes
call for the
some
weight
of
needle
and
bobbin
thread.
For
best
results, o
soft
thread
oF an
even
and
moderate
twist
should
be
used
in
the
needle.
We
should like to
stress
at
ttvis
point
that
only the very
best
threads
in
the
weights
recommended
above
should
be
used
for sewing buttonholes.
Besides the quality of the
thread
it is its condition
at
the time of use whrch
should be given due consideration
because
even
threads
of superior quality
may
turn brittle
end
loose
their tensile
strength
when
stored
in
dry
rooms
for
too
long. Inferior
quality
threads
are
completely
unsuitable for this
type
of
work.
The
PFAFF 3114 is corefully stitched
off
with
threads
of the
grades
and
weights most suitoble for the purpose the machine is intended for.
No
guarantee
will be
assumed
for the
proper
working of the machine
end
the
neat
appearance
as well as the durability of the buttonhole if
thread
of
o
poor
quality
is
used.
If
there
is
any
doubt
about
the
cause
of
thread
breaking
and
you
want
to find
out
whether
the
thread
or
the
machine
is
at
fault,
press
the
right
treadle
halfway
down
and
sew
the
buttonhole
at
half the
normal
speed.
4.
Inserting
the
Needle
The needle. System 134R, is linserted inio the needle
bar
with the long
groove facing the arm standard, and is pushed up as far as it will go.
5.
Threading
the
Needle
As shown in
photc»s
4 and 8, the
PFAFF
3114
Js threaded as follows: Pass
the
thread
from the threod unwinder through the hole in spool pin 1,
be
tween the discs of top tension 2, at the beck of threod pull-off pin 3,
through
thread guide 4 and the upper hole of thread guide 5, between the
discs of main tension 6, through thread check spring 7, under thread regula
tor 8,
through
thread guide 9 and take-up lever
10,
through
thread guides
11,
12 and 13 on top and bottom of the face plote and on the needle bar, ond
back-front through the needle
eye
14.
After threading the needle and before commencing to sew the first button
hole, lay the needle thread toward you
under
the work clamp and hold the
bobbin
thread
with your
hand
under the
needle
plate.
11
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