Front
up
Standard
Front
down
DotL_^
Screw
driver
Set
screw
Feed
driving
fork
•
,^CIamp
screw^
H
ri"
Adjusting
the
feed
dog
Inclination
(excepting DDL-555H-4):
The
feed dog
of
each
machine has been
adjusted
to
horizontal
position
(standard
posi
tion). It can be changed, if necessary, according
to
the
varied sewing
conditions,
o
Descent
(front-up)
position:
Puckering is
prevented
and
chain-off
thread
is easily
comming
out.
o
Ascent
(front-down)
position:
Cloth
slipping
and
breakage
of
knitted
fabric
texture
arc prevented,
o The standard inclination
of
the feed dog is
that
the
engraved
dot
on the feed bar
shaft
is aligned
with
the axes
of
2 setscrews.
Loosen
2 setscrews
of
the feed bar
shaft,
insert
a
screw
driver
blade
into
the
slot
in
the
feed
bar
shaft
and
turn
90"
in
either
direction. The front top of the feed dog will
be raised to
the
highest position when the
shaft
is
turned
90"
in
the
direction
shown
by an
arrow,
and
vice versa.
(Note)
The
height
of
the
feed
dog
must
be
corrected
every
time
after
changing
its
inclination.
Adjusting
the
feed
dog
height:
The standard height
of
the feed dog is to Jut
out
its
teeth
0.8 mm
(1/32")
above the
throat
plate surface when sewing general materials. It
is advisable to change the feed dog height to
about 0.6 mm (1/64") for sewinglight-weight
materials
and
about
1.0 mm
(3/64")
for heavy
weight
materials.
If
the
feed dog
teeth
Juts
out
too
much
above
the
throat
plate surface, puckering seam may be
occurred.
Loosen
the
setscrew
of
the
feed
rocker
shaft
crank, set
the
feed bar for a
proper
position
and
securely
tighten
the
setscrew.
0.8mm
Feed
dog
j/^c
Throat
plate
-
21
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