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When
lower looper
thread
laps
round
When
upper
looper thread
laps
round
When needle
thread
loosens
over
th€
back
Needle
thread
o
o
o
o
;F
J*P
o
o
o
o
b?
oii
)E
o
CL
o
o
3ej
o:
-ri
o
o-
o
I
od
O.o
Tighten
upper looper thread
tension
or loosen lower looper thread tension.
Tighten lower
looper thread
tension
or loosen upper looper thread tension.
Tighten
needle
thread tension
or
loosen
both
upper looper
thread
tension
and
lower
looPer
thread
tensi
on.
(Fisure
331
(
Figure
31
l
{Figure 32}
o
o
o
o
ooi
3-2
Adjustment
for
2-thread overedging
The
bottom
line
of
each
thread tension
adjuster
knob
should be
r,anged
within
the
red strip
zone
on
the
adjuster
dial
cover (Figure
34)'
First, line up the bottom
lines
of
the both
ten-
sion
adiuster
knobs
with the
center
of
the
red
stri
P.
Then make
minute
adiustments
of
each
adjuster,
checking
the
seams
coming out
with
each
adjust-
ment.
Figure
35
shows ideal
seams
sewn
by
2-
thread
overedging.
Red
strip
Bottom
line
Tension adjuster
knob
(Figure 34)
t
ldeal
seams
When
lower looper
thr€ad
laps
round
over
the
back
When
needle
thread
laPs
round
over
the
face
!
o
T
o
o
o
o
o
J
!
G
o
E
o
o
o
o
o
E
o
)
o
€
o
E
O
o
o
-
o
3
o
J
Tighten lower
looper thread
tension
or
loosen
needle
thread
tension.
Tighten
needle
thread tension
or
loosen
lower looper
thread
tension.
,""*\-/
Y,*
\-i
-
(Figure 35)
(
Figure 36)
{Figure 37}
14
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