21.
HEIGHT
OF
THE
FEED
DOG
22.
TIMING
TO
RELEASE
THE
THREAD
TENSIONS
(Starts pushing)
0.9
mm
'
Feed
dog
I j
Throat
plate
t
Throat
plate
TPZTTTTTT^^'
3
mm
The
feed
dog
must
protrude
its
teeth
0.9
mm
from
throat
plate surface when it has come up to the highest point of
its
trajectory.
1.
Set
the
stitch
dial
to
"0".
2. Turn the handwheel in the normal direction to bring the
feed dog
to
the highest
point.
3. Loosen screw and adjust the height of the feed dog to
0.9
mm by moving feed
bar
slide
fork
O •
1. Raise
the
presser
foot
3
mm
(1/8")
from
the
throat
plate
surface
by
the
hand
lifter.
2. Loosen screws e
and
adjust
the
height
of
thread
tension
release link (B) O in
the
way
that
the link starts pushing
the
tension
disc
away
to
release
the
thread.
23.
NEEDLE-TO-HOOK
RELATION
o
o
*
Set
the
needle
to
hook
relation
in
the
following
way:
1.
Set
the
stitch
dial
to
"2".
2.
Turn
the
handwheel
to
bring
the
needle
bar
to
the
lowest
point
of
its
stroke
and
loosen
screw
O
which
clamps
the
needle
bar
connection.
(Set
the
needle bar height)
3. Align
upper
marker
line O engraved on needle
bar
O with
the
lower
end
of
needle
bar
frame ® and tighten screw Q •
(Set
the
hook)
4. Loosen
three
setscrews O to set free the
hook
shaft
gear (small).
Turn
the handwheel
until
lower
marker
line © engraved
on
the
needle
bar
meets
the
lower
end
of
the
needle
bar
frame.
5.
Loosen
two
setscrews O
and
adjust
the
position
of
hook
driving saddle O
to
provide
a clearance
0.02
~0.05
mm
between
needle
0
and
hook
blade
point
0 .
6. Align
the
hook
blade
point
with
the
center
of
the
needle and fix
the
hook
shaft gear (small) by tightening three setscrews.
24.
HOOK
NEEDLE
GUARD
0.15
0.2
mm
(Bend
hook
needle
guard
inwards)
(Bend
hook
needle
guard
outwards)
When a
hook
is replaced,
you
must
adjust
the
working
point
of
the
hook
needle guard. Hook needle guard 0 must push needle O away
for 0.15 or 0.2 mm. Adjust it by carefully bending the
hook
needle
guard.
1. If
you
want
to
bend
it inwards, do it from
the
outside of the
hook
needle
guard
using
a
screw
driver.
2. If
you
want
to bend it
outwards,
do it from the inside of the
hook
needle
guard
using a
screw
driver.
- 6 -
25.
BOBBIN
CASE
OPENING
LEVER
r
1.
Turn
the
handwheel
in
the
normal
direction
until
bobbin case opening lever O has entirely
with
drawn
from
its
working
position..
2.
Turn
bobbin
case
0 in
the
direction
of
the
arrow
until
stopper
0 rests in
the
groove
on
throat"
plate
O.
3.
Loosen
screw
0
and
provide
a
0.2
to
0.3
mm
clearance
between
the
bobbin
case
opening
lever
and
protrusion
0 on
the
bobbin
case.
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