Newlong DS-9A - Adjusting Looper Clearances

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5. Adiustine/ffi
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c) Clearance
Between Looper and
Needle
Adjust the
clearance between
the needle
and the looper
to
between 0.05-0.1mm when the needle
goes
forward
and
passes
the
rear of
the needle.
To
obtain
the
corect
clearance,
loosen the
screw
@
of the
looper rocker
frame
@
and incline
@
the looper
rocker. Adjust
the
clearance ofthe
needle and looper
to between 0.1-0.5mm
when the looper
moves fonnard to the
right at the closest
point
to the needle.(Fig.7-a)
To facilitate the adjustment
first adjust the looper avoid
eccentric cam
so that its
screw is 45" to center of the
main shaft.(Fie.7-b)
d) Clearande^Between Looper Retainer
and
Needle
Loosen set screw@ and adjust the
clearance of the
needle and looper
retainer
to between
0.05-0.1mm as the
needle
goes
up.(Fie?-c)
c)
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Fig.7-o
Fig.7-b
Fig.7-c
Fig.7