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1
Height and stroke of the bobbin case opener
.05.13
Requirement
1. The top edges of the bobbin case opener 1 and bobbin case base 3 should be on one
level.
2. When the bobbin case opener 1 has defl ected the bobbin case to its furthest point,
the catch of the bobbin case should be 0.3 - 0.5 mm from the back edge of the needle
plate recess.
1
2
Fig. 1 - 12
● Adjust bobbin case opener 1 (screw 2) in accordance with requirement 1.
● Turn the balance wheel until the bobbin case opener has defl ected the bobbin case
to its furthest point.
● Adjust bobbin case opener 1 (screw 2) in accordance with requirement 2.
Adjustment
3
1
0,3 - 0,5 mm
21
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