2.12 Bobbin winder
Caution: Danger of injury !
Switch off main switch.
Check and adjust bobbin winder only when the sewing machine is
switched off.
Standard checking
The bobbin winding operation must stop automatically when the bobbin
is filled up to approx. 0.3 mm below the edge of the bobbin.
The driver wheel 2 and the bobbin winder wheel 6 have to be fastened
on the bobbin winder spindle in such a way that the first screw in
rotation direction is always located at the flat spots of the bobbin
winder spindle.
The bobbin winder wheel 6 should have no axial backlash, but it must
not move too heavy.
Basic adjustment
–
Remove bobbin winder.
Unscrew the two fastening screws 1 and 5 and pull the bobbin
winder off.
–
Screw in screw 4 so far that both shanks of the bobbin winder clip 3
are in parallel position.
–
Stick a completely filled bobbin on the bobbin winder.
–
Turn bobbin winder clip 3 in such a way that it abuts on the thread
on the bobbin.
–
Loosen screw 7 on the switching cam 11.
–
Adjust switching cam 11 in such a way that the corner 10 of the
switching cam and the corner 8 of the leaf spring 9 lie one on top of
the other (spring is tensioned) and the bobbin winder clip 3 has no
axial backlash.
–
Tighten screw 7.
36
54321
11 6
11
7
8
9
10
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