Adjustment
12
15.04.07 Height and stroke of the bobbin case opener
Requirement
1. The top edges of the bobbin case opener 1 and bobbin case base 3 should be on onelevel.
2. When the bobbin case opener 1 has defl ected the bobbin case to its furthest point,
thecatch of the bobbin case should be 0.3 - 0.5 mmfrom the back edge of the needle-
plate recess.
● 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.
Depending on the thread size, a variation of the setting in Requirement 2 isper-
mitted.
1
2
Fig. 15 - 07
3
1
0,3 - 0,5 mm
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