Singer 3337 Instruction Manual page 30

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TROUBLESHOOTING AND MAINTENANCE
Troubleshooting
Possible Cause: "Pushing" or "pulling" the fabric.
Solution: Don't manually push/pull fabric in order to sew, but allow the machine's feed teeth to
draw fabric under presser foot as you guide it.
Possible Cause: Incorrect stitch length setting.
Solution: Check for correct stitch length setting. (Go to www.singerco.com to view the Stitch
Reference Guide)
Possible Cause: Stabilizer may be needed for technique.
Solution: Place stabilizer underneath fabric. (See appendix in this manual)
Possible Cause: Top thread tension is too tight.
Solution: Reduce the top thread tension. (See Page 18)
Possible Cause: Stitch length is set too short for the fabric being sewn.
Solution: Increase stitch length. (Go to www.singerco.com to view the Stitch Reference Guide)
Possible Cause: Wrong style needle for fabric type.
Solution: Use correct needle style. (Go to www.singerco.com to view the Stitch Reference
Guide)
Possible Cause: Needle too large for fabric.
Solution: Change to smaller size needle. (See Page 25)
Possible Cause: Fabric is not properly stabilized for the density of the stitches. (for example,
satin stitch applique)
Solution: Add a fabric stabilizer underneath the fabric to help keep the stitches from tunneling in
together, forming a puckered ridge in fabric. (See Appendix in this manual)
Possible Cause: Presser foot lifter has not been lowered onto fabric after threading.
Solution: Lower the presser foot lifter before starting to sew. Don't "push" or "pull" the fabric as
you sew.
Possible Cause: Feed dogs are covered by Darning Plate.
Solution: If the feed dogs have been covered, the Darning Plate needs to be removed to resume
regular sewing.
Possible Cause: Stitch length is set at zero.
Solution: Increase stitch length setting.
30
10. STITCHES DISTORTED
11. FABRIC PUCKERS
12. FABRIC IS "TUNNELING" UNDER STITCHES
13. MACHINE NOT FEEDING FABRIC