Helpful Hints - Singer 9920 Instruction Manual

HELPFUL HINTS

PROBLEM CAUSE
Machine not properly threaded.
Upper thread Thread entwined around bobbin.
breaks Needle inserted incorrectly.
Thread tension too tight.
Thread of incorrect size or poor quality.
Lower thread Bobbin threaded incorrectly.
breaks Bobbin wound unevenly or too full.
Dirt on the bobbin holder.
Needle inserted incorrectly.
Machine skips Bent or blunt needle.
stitches Incorrect size of needle.
(on stretch fabric)
Machine not properly threaded.
Fabric puckers Bobbin threaded incorrectly.
Blunt needle.
Thread tension too tight.
Machine makes Bobbin threaded incorrectly.
loose stitches or Machine not properly threaded.
loops Tension not adjusted properly.
Stitch pattern is Presser foot is not suited for the pattern.
misformed Thread tension is not balanced.
Threader does Needle is not raised.
not thread Needle inserted incorrectly.
needle eye Bent needle.
Feed dogs are lowered
Machine does Stitch length not suitable for fabric.
not feed properly Lint and dust accumulated around feed dog.
Pressure regulator set too low.
Fabric pulled while sewing.
Needle is hitting the presser foot.
Needle breaks Needle inserted incorrectly.
Incorrect size needle or thread for fabric
being sewn.
Machine runs Dirt or lint accumulated in the hook race and
with difficulty feed dog.
Cord not plugged into electrical outlet.
Power switch is not turned on.
Machine will not Bobbin winder spindle is pushed to the right.
run Presser foot is not lowered.
Buttonhole Sewing Mode;
* Buttonhole lever is not lowered completely.
* Buttonhole foot is not attached.
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9920EFSt.pm6
82
CORRECTION
Re-thread machine.
Remove entwined thread.
Re-insert needle.
Readjust thread tension.
Choose correct thread.
Re-thread the bobbin.
Rewind the bobbin.
Clean the holder.
Re-insert needle.
Insert new needle.
Choose correct size needle for
fabric.
(use stretch needle)
Re-thread machine.
Re-thread the bobbin.
Insert new needle.
Readjust thread tension.
Re-thread the bobbin.
Re-thread machine.
Readjust thread tension.
Attach correct foot.
Adjust the thread tension.
Raise the needle.
Re-insert needle.
Insert new needle.
Raise the feed dogs
Regulate stitch length.
Clean the feed dog area.
Increase pressure.
Do not pull fabric.
Select correct foot and pattern.
Re-insert needle.
Choose correct size needle and
thread.
Remove the needle plate and
bobbin holder and clean the
hook race and feed dog.
Insert plug fully into outlet.
Turn on the switch.
Push spindle to the left.
Lower the foot.
Lower the buttonhole lever.
Attach the buttonhole foot.
2003.9.10, 8:42 PM
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