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Adjustment Procedures
1) Looper return
(1) Front looper
1. Loosen the setscrews
2. Mount the front looper
the setscrew
.
3. Rotate the pulley counterclockwise, move the front looper
the most left position, and measure the clearance from the tip of
the front looper
or a scale.
4. For adjusting the clearance to the standard distance, loosen the
setscrew
securing the front looper base to adjust the position
of the front looper base
5. After adjustment, tighten the setscrew to secure the front looper
base setscrew
(2) Middle looper
1. Rotate the pulley counterclockwise and align the tip of the front
looper
with the left surface of the left needle
2. Mount the middle looper
tighten the setscrew
3. Loosen the setscrew
move the middle looper base
the tip of the middle looper
needle
.
4. After adjustment, tighten the setscrew
looper base.
(3) Rear looper
1. Rotate the pulley counterclockwise and align the tip of the front
looper
with the left surface of the left needle
2. Mount the rear looper
the setscrew
.
3. Loosen the setscrew
the rear looper base
the rear looper
4. After adjustment, tighten the setscrew
base.
(Caution) When the positions of each looper base (
are adjusted in the right-left direction, adjust the
clearances from the tips of the loopers (
to the needles (
2) Adjustment of the clearance between the looper and needle
1. Loosen the setscrews (
to adjust the positions of the looper bases (
front-rear direction.
2. After adjustments, tighten the setscrews ( ,
the looper bases.
(Caution) When the clearances are adjusted, check the looper
return positions for each looper (
right-left direction because the looper bases (
) may move in the right-left direction.
to remove the throat plate
on the front looper base
to the left needle
with the looper gauge
in the right-left direction.
.
on the middle looper base
.
securing the middle looper base and
in the right-left direction to align
with the left surface of the right
on the rear looper base
securing the rear looper base and move
in the right-left direction to align the tip of
with the left surface of the middle needle
to secure the rear looper
,
, and
) as well.
,
, and
) securing the looper bases
.
and tighten
to
.
and
to secure the middle
.
and tighten
.
,
, and
)
,
, and
)
,
, and
) in the
, and
) to secure
,
, and
) in the
,
, and
– 17 –
Results of Improper Adjustment
o Insufficient or excessive looper
return may cause stitch skipping,
needle breakage, or thread
breakage.
o When each looper base (
and
) is moved leftward, each
tip of loopers (
,
detached from each needle (
, and
).
o When each looper base (
and
) is moved rightward, each
tip of loopers (
,
touches each needle (
).
,
,
, and
) is
,
,
,
, and
)
,
, and
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