Pfaff coverlock 4852 Owner's Manual page 59

2-thread rolled hem (folded)
Program 13
Note: The converter (see page 32) must be
attached to sew the 2 thread rolled hem.
The upper needle thread (green) is too loose.
Set the green thread tension to a higher
value and/or the yellow thread tension to a
lower value.
The lower looper thread (yellow) is too
loose.
Set the yellow thread tension too a higher
value.
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