Adjustment Of The Thread Winding (Uneven Bobbin Winding And Amount Of Thread Winding) - promelectroavtomat XL2120 Service Manual

Adjustment
21.Adjustment of the Thread Winding
(Uneven Bobbin Winding and Amount of Thread Winding)
1 Move the thread winding guide assembly up or down to adjust and correct for uneven bobbin winding.
(Uneven bobbin winding)
2 Rotate the bobbin presser to adjust the amount of thread winding. (As a guideline of thread winding amount,
a bobbin should be wound up to 80 to 90% of the external diameter of the bobbin.)
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80 - 90%
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