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(Caution)
For
the
Models,
8991DS
and-DF,
the
fully-dry
hook is adopted,
Comparing with
the
sewing
machine using the existing hook, the
sewing
machine tends to be
affacted
by
the
adjustment of
the thread take-up
spring.
If the thread take-up
spring
does not
work sufficiently,
thread
running
increase.
As a result,
thread breakage, balloon
stitching etc.
may
occur.
To
judge the
work of
he
thread
take-up
spring, confirm whether or
not the
thread
take-up
spring
works
up to the last before needle thread is pulled out from
@
when
puUing out needle thread in
the direction
of@
after the pressure
of
he thread take-up
spring
has
been
performed.
When it
does not
work
up to the last, decrease the pressure
of
the thread
take-up spring.
In
addition,
the
stroke of
the thread take-up
spring
is
excessively small,
the
spring
does not
work
properly.
For
the
general
fabrics, a
stroke of
10 to 13 mm
is
proper.
16.
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I
ADJUSTING
THE THREAD TAKE-UP
STROKE
A
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a
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.
WARNING:
A
Turn OFF
the
power before
starting
the work
so
as to prevent accidents caused by abrupt
start of the sewing
machine.
I
)
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,
~~~
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.
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I)
When
sewing
heavy-weight
materials, move
thread guide
(Dto
the
left
(in direction
@)
to increase
the length
of
thread
pulled out by the
thread
take-up.
2) When
sewing light-weight
materials,
move thread guide (Dto the right (in
direction@)
to decrease the length
of thread pulled out by the thread take-up.
3) Normally
thread
guide(Dis positioned in a
way
that marker
Jin
©is
aligned with
the
center
of
the
screw.
17.
mi tf•
ll:fil::'i':ll9iftiJm
I ADJUSTMENT THE NEEDLE STOP POSITION
A
i!:dr.
"'
a
'~~
1'1
y
[l;lj
Jl:~~JJ;f'JLl't'-J~j~~l;IJ
,
·fill
:k
~El!
VJRZ
}§-:fl}
:i!t
fi:I*
1' F
.
WARNING:
A
Turn
OFF the
power before
starting
the work
so as to
prevent
accidents
caused by
abrupt
start
of
the sewing
machine.
- 15
-
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