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(4) Looper adjustment
1) Looper return
When each looper ( , , and ) is at the most left position, the standard distance from the tip of each
looper ( , , and ) to the center of each needle ( , , and ) is 3.6 mm (9/64").
1. Standardization of the front looper
When the front looper is at the most left position, measure the distance from the tip of the front looper
to the center of the left needle with the gauge and a scale and adjust the distance to the
standard value, i.e. 3.6 mm (9/64").
2. Standardization of middle and rear loopers
When the tips of the middle and rear loopers ( and ) are simultaneously aligned with each left
surface of the middle and right needles as well as the tip of the front looper with the left surface of the
left needle , the middle and rear loopers are in the standard positions.
(Caution) For the front looper , the looper return is adjusted with the gauge and a scale, and for
the middle and rear loopers ( and ), the looper return is adjusted by aligning the tips
of the middle and rear loopers ( and ) with the left surfaces of the needles ( and ),
respectively.
• •
Front-rear direction
Alignment
2) Adjustment of the clearance between the looper and needle
When the tips of each looper ( , , and ) are at the center of each needle ( , , and ), the standard
clearance is 0.0mm (slight touch).
After adjusting the rear needle guide , make sure again that the clearance between the loopers ( , ,
and ) and the needles ( , , and ) is 0.0 mm respectively, and perform final adjustment of the clearance
after threading.
(Caution) If clearance adjustment is performed without the rear needle guide , a little strongly touch
the tips of the loopers ( , , and ) with the needles ( , , and ), respectively.
Alignment
3.6mm
9/64
Front-rear direction
• •
Center of needle
Looper tip
Clearance of 0.0 mm (slight touch)
Clearance of
0.0 mm
(slight touch)
Right-left direction
Standard Adjustment
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