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41
Needle thread tension release
Requirement:
Tension actuator 1 (screw 2).
42
Thread check spring and thread regulator
Requirement:
.1
Check spring stroke: loosen clamp plate (screws) and and turn thread tension accordingly.
.2
Thread regulator 3 (screws 5).
43
Bobbin winder
Requirement:
Axial adjustment of bobbin winder driving wheel 7 (screws 8).
Requirement:
Adjust pin 9 (screw 10).
38 PFAFF
When the presser bar lifter is raised, the tension disks must be 0.5 mm apart
(Fig. 1).
Thread check spring stroke = 5 to 7 mm
Thread regulator 3 (Fig. 2) must be roughly in the middle.
Both adjustments depend on the thread and the material and may deviate
slightly from this basic setting.
When the bobbin winder is engaged, the winding spindle must be driven
reliably.
When it is disengaged, friction wheel 6 (Fig. 3) must not touch winder
driving wheel 7.
The bobbin winder must switch off automatically when the amount of
wound thread is about 1 mm from the edge of the bobbin.
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