Newlong DS-9P - Feed Mechanism Calibration

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5. Adjustins/ffi
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4. Feed
Mechanism
a)Clearance between Throat Plate and
Feed Dog
Ensure that
the feed
dog
does not touch
the
throat
plate
as it
passes
through. A clearance of
1.5mm
should
be seen
between the middle teeth
of the front feed dog and the
throat
plate
as
indicated
(p'k.A).
b)Height of the Feed Dog
o
Adjust
the
height
of the feed dog so that it
protrudes
2.5mm from
the upper surface ofthe throat
plate
when the
feed
dog
has risen
to the
highest
position,
as
shown
in
(p'ig.g).
If the feed
dog
is higher than
this, stitch will not
chain satisfactorily, and if it is lower
than this, the
stitch
width will be too smal1. Slacken nut
@
with a box spanner
to
adjust the height
of
the Feed Dog.
It is
important to
adjust the height with set screw
@
to
ensure that
the
pressure
from
the Pressure Foot should not force it back
down. Tighten nut
@
when
the adjustment
is
correct.
o
The
Rear Feed
Dog should
be
set 0.1mm lower than the
Front
Feed Dog.
Gaution:
Tentatively tishten the
nut
and make several stitches to
be sure the required stitch length is obtained.
After
the
confirmation,
firmly
tighten
the nut with
a spanner.
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