Baby Lock BL50A Instruction And Reference Manual page 103

c Slide the bobbin winder shaft to the left, and
then remove the bobbin from the shaft.
d Hold the thread end with your left hand, and
wind off the thread clockwise near the bobbin
with your right hand as shown below.
e Wind the bobbin again.
Note
● Make sure that the thread passes under the
pretension disk of the bobbin-winding
thread guide correctly (page 17).
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