Pfaff coverlock 4852 Owner's Manual page 55

2-thread fl atlock
narrow and wide
Program 03 and 04
When all tensions are correctly set, the loops
of both threads are directly on the underside
of the fabric.
Note: The converter (see page 32) must be
attached to sew the 2-thread fl atlock seam.
The needle thread is too loose or the lower
looper thread (yellow) is too tight.
Set the relevant needle thread tension to
a higher value and/or the yellow thread
tension to a lower value.
The lower looper thread (yellow) is too
loose and/or the needle thread is too tight.
Set the yellow thread tension to a higher
value and/or the relevant needle thread
tension to a lower value.
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