Height And Stroke Of The Bobbin Case Opener - Pfaff 571 Adjustment Manual

1

Height and stroke of the bobbin case opener

.04.10
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 - 10
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.
Adjustment
3
1
0,3 - 0,5 mm
19