Pfaff creative coverlock 4874 Owner's Manual - Page 142
The presser foot pressure
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Problem Seam puckers Fabric is not being fed evenly Cause Remedy Thread tension is too tight Reduce thread tension. The differential feed is set incorrectly Adjust differential feed (see page 2-34). The thread has jammed because Thread correctly. of incorrect threading The stitch length is too short Increase stitch length (see page 3-4). The presser foot pressure is too low for heavy fabric The presser foot pressure is too high for light fabric Increase presser foot pressure (see page 2-25). Reduce presser foot pressure (see page 2-25). 9-6
9-6
Problem
Cause
Remedy
Seam puckers
Thread tension is too tight
Reduce thread tension.
The differential feed is set
Adjust differential feed (see page 2-34).
incorrectly
The thread has jammed because
Thread correctly.
of incorrect threading
Fabric is not being
The stitch length is too short
Increase stitch length (see page 3-4).
fed evenly
The presser foot pressure
Increase presser foot pressure (see page 2-25).
is too low for heavy fabric
The presser foot pressure is too
Reduce presser foot pressure (see page 2-25).
high for light fabric