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Adjustment
19
1.04.10 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 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.
● 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.
On the PFAFF 574 these adjustments must be repeated on the right post.
Depending on the thread size, a variation of the setting in Requirement 2 is
permitted.
1
2
129-007
0,3 - 0,5 mm
129-006
3
1
Fig. 1 - 10