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(7) Adjustment of rear needle guide
1) Longitudinal adjustment of the rear needle guide
1. When the pulley is turned counterclockwise and the rear needle holder advances to the most front
position, it lightly touches the left needle and then tip of the front looper passes.
When tip of the front looper reaches the position 1.5mm apart from the left side of the left needle
while this front looper moves in right direction, the standard position is that the needle tip comes in
contact with the rear needle holder .
2. The relationship between the middle needle and the rear looper and between the right needle and
the middle looper is also required to assume the same conditions as 1. above in standard positioning.
(Caution) 1. The rear needle holder somewhat changes its contact position with the respective
needles ( , , and ) according to the needle entry position.
Recheck the needle entry condition for adjustments if the contact positions of the right
and left needles ( and ) seem to be different.
2. To change the stitch length, readjustment of the front and rear positions is also needed
for the rear needle holder .
2) Height adjustment of rear needle guide
1. When tip of the front looper coincides with the right side of the left needle , the standard dimension is
2.0mm between the lower position "A" of the needle hole and Point B of the rear looper .
2. The relationship between the middle needle and the rear looper and between the right needle and
the middle looper is also required to assume the same conditions as 1. above in standard positioning.
• •
• •
The clearance between tip of looper
and needle is 0.0 mm.
(Light contact)
Longitudinal directions of rear needle guide
1.5mm
Longitudinal directions
2.0mm
A
B
Right and left directions
Vertical direction of rear needle guide
Standard Adjustment
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