Adjustment
36
O
Adjust the hook (screw
1
)
according to
rule
1
.
O
Mount the lower bobbin position finger according to
rule
2
.
13
.05.30
Needle bar rise, hook-to-needle clearance and lower bobbin position finger
Fig. 13 - 31
Rule
1. At the needle position setting "
Middle
", a zigzag setting of "
0"
and a needle bar
position
2.0
after b.d.c.(hole
1
),
the hook point should be in the middle of the needle
and the clearance between the needle and the hook point should be
0.05
to
0.1 mm
.
2. The lower bobbin position finger
3
should be mounted so that there is a clearance of
0.5 mm
between the lower part of the bobbin case and the front edge of the bobbin
case position finger (see arrow).
1
0.05 -0.1 mm
0.5 mm
2
3
Summary of Contents for 937
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