Singer 246-3 - To Thread the Machine for Two-Thread Overedge Stitch

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
10
TO
THREAD
THF
MACHINE
FOR
TWO-THREAD
OVEREDGE
STITCH
NeedL,
Thread
Fig. 13. Threading the Unwinder
#
151031
Fig. 13B. Threading
Needle-Thread Eyelet
NOTE:
Fig.
13B
illus
t1
utcs
how
the
needle
threw!
eyelet
sho1ild
be
th,coded
fo1
tlw
two
threc1d 0·1cr-ed,Jc
stitch.
1
For
detc1ilecl
clr,sc,
ij,
tior1
of
th1ec1cli1HJ
th,•
11eccllc, sr,c
page
5-
When
the
machine
is
properly
refitted,
thread
unwinder
#
151031,
as
shown
in
Fig.
13,
at
the
left,
then
thread
the
ma-
chine
as
shown
in Figs.
13A,
13B
and
l
3C,
below.
NOTE:
When
sewing
with
nylon
thread,
thread
unwinder
#
228705,
available
upon
order,
may
be
used
if
desired.
Fig. 13A.
Threading
the
Looper
Take-up
Fig. l 3C.
Threading
the
Machine
11
TO
REGULATE
THE
TENSIONS
See Fig. 14
Tens ions
of
the
needle
thread
and
the
looper
threads
should
be
suf-
ficient
to
ensure a tight stitch,
while
still
light
enough
to
permit
the
threads
to
be
easily
drawn
without
breuking.
The tension
of
the
needle
thread
is
regulated
by
the
thu111b
nut
R.
The tension
of
the
left
looper
thread
is
reguluted
by
the thumb nut
S.
The tension
of
the right
looper
thread
is
reguluted
by
the thumb nut
T.
Fig. 14. Adjustments
TO
REGULATE
THE
PRESSURE
ON
THE
MATERIAL
See Fig. 14
The pressure
of
the
presser
foot
V
on
the
material,
is
regulated
by
the thumb
screw
U
ut
the
top
of
the
nmchine.
To
increuse
the
pressure,
turn
the
thumb
screw
U
downward.
To
decrease
the pressure, turn the
thumb
screw
U
upward.
TO
CHECK
THE
CURVATURE
OF
THE
NEEDLE
See Fig. 15
The
curvuture
of
the
needle
blade
should
be
checked
with
Gc1uqe
#
I
6-133(,
bcfo1 c
111c1ki1lfJ
ony
stitching
mJiustme11ts To
check
the
needle
cu1vc1t1,1e,
plCice
the
ncecllf? in
the
gc::.iqe,
so
thot
its
!lot
siclc lies
nlong
the
botto111
s1i1
focr.:
of
the
yroove
A6.
Pusl1
the
needle
into
the
groove
os
for
c1s
it
will
go
ogoinst
the
stop
B6.
Turn
the
thumb
nut
C6,
cousing
the
tir
of
the;
rndiul
qcwge
D6
to
follow
the
curve
of
the
nef?dle blc1de The
tir
should
just
•noke
contoct
nt
the
eye,
crnd
should
be
005
to
.006
inch
elem
at
the
upper
end
of
the
curve.
Whe11
the
11eedle
does
not
pass
this
test, it
should
be
replc1Ced
with
one
hewing
the
correct
curvature.
fig.
15
Needle
Curvature
Gauge
No.
164336