From the Library of Superior Sewing Machine & Supply LLC
5.
Aqjustment/wlff
!i!f
1-2
Check
of
Dimension
of
Needle Center to Looper
point
Distance between Needle
center
and Looper point, (B)
of
Fig.2,
is
5.5mm,
when
Looper
(D
is
in
the extreme right.
To
obtain this dimension, loosen nut (b), and
tum
Eccentric
Ball
(d)
of
Looper Connecting
Rod
AE.s'y
@ clockwise
when
dimension (B)
is
smaller than
5.5mm,
and counterclockwise
when
it
is
larger than
5.5mm.
After adjustment, check looper travel distance W and
confirm
it
is
in
specified
range
of
25
to
26mm.
Ifnot
adjust
Eccentric
Ball
(c)
of
Looper
Bell
Crank Connection
Rod
®
again
while
checking dimension between Needle @ center
and Looper
(D
point, until both dimension.
1-3 Check
of
Height
of
Needle
Needle ® and looper
(D
movements are correctly timed
if
distance (A and A' of Fig.3) between Looper point and
Needle hole when Looper point gets in line with left-side
edge
of
Needle ® is
the
same as Looper
(D
passes Needle
in
forward
and
backward
movements.
A =
A'
±0.3mm
iB
allowable. To adjust loosen screw, (a)
ofFig.2,
and
tum
¢ric
Ball (c)
of
Looper Bell Crank
Connection Rod ®
as
appropriate. Looper eyelet should
overlap with lower
part
of
long hole
of
Needle,
as
shown in
Fig.4
as
Looper goes forward. To adjust, move Needle Bar
@ vertically after loosening screws (a) and (b) of Fig.5 for
Needle Bar Connection @ and Needle Thread
Take-Up(v.
Firmly
set
screws after adjustment.
CAUTION
1.
To facilitate aqjustment,
set
height
of
Needle point
above
throat
plate @ to 17mm, W
of
Flg.5,
for
DN-
2HS, and 18.5mm, (B)
of
Rg.5,
for
DN-2W,
with Needle
Bar
in
its highest position.
2.
Confirm
proper direction
of
Needle @ when Needle Bar
@ has been aqjusted (Refer
to
Fig.13).
=
.'
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le t
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Fig.3
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•
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Fig..4
