Bobbin Case Opener Position - Pfaff 937 Instruction Manual

11

Bobbin case opener position

.05.28
Requirement
1. There must be a clearance of 0.5 mm between the top edge of the bobbin case opener
and the inner edge of the bottom section of the bobbin case.
2. Between the bobbin case opener finger and the bottom section of the bobbin case
opener there must be a clearance of 0.8 mm.
3. At the left point of reversal of the bobbin case opener the bobbin case positioning-finger
must be approx. 0.3 mm from the right side of the groove in the bottom section of the
bobbin case.
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Fig. 11 - 30
Loosen screw 2.
Place bobbin case opener 1 onto the right side of the bottom section of the bobbin case,
press against clamp crank 3 and lightly tighten screw 2.
Loosen screw 5, move eccentric bearing bush 4 in accordance with requirements 1 and
2 and tighten screw 5.
Turn bobbin case opener 1 in accordance with requirement 3 and tighten screw 2, taking
care to ensure that bobbin case opener 1 is touching clamp crank 3.
0.8 mm
0.3 mm
Adjustment
1
2
3
4
5
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