Troubleshooting – SINGER 112 User Manual
Page 33
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Zigzag Sewing Machine
instruction Manual and Parts List
5.
Troubleshooting
Whenever sewing difficulty is encountered, check and make adjustments as follows.
Problem
Possible Causes
Po.ssible Solutions
Needle
thread
breaks
1. Is machine properly threaded?
1. Correct needle threading
2. Are thread guides or tension disc area lint-
free?
2. Remove lint & fluff in bobbin case & hook
3, Is needle-thread tension too tight?
3. Adjust needle thread tension
4. Is needle bent or has a blunt point?
4. Insert new needle
5. Is needle inserted correctly?
5. Insert needle correctly
6. Is needle the correct size for thread & fabric?
6. Select proper needle size & thread
7. Is thread free of slubs & knots?
7. Remove slubs & knots
Bobbin
thread
breaks
8. Is bobbin threading correct?
8. Correct bobbin threading
9. Is thread tangled or caught?
9. Untangle thread from bobbin case & hook
10. Is thread tension correct?
10. Adjust needle & bobbin case thread tension
11. Does bobbin rotate smoothly?
11. Check whether bobbin thread is wound correctly
Stitches
skip
12. Is needle inserted correctly?
12. Insert needle correctly
13. Is needle bent or has blunt needle point?
13. Insert new needle
14. Is size of needle & thread suitable for
fabric?
14. Select proper needle size & thread
15. Is threading correct?
15. Correct needle threading
Needle
breaks
16. Is needle properly inserted?
16. Insert needle correctly
17. Is needle bent?
17. Insert new needle
18. Is needle the correct size for the fabric?
18. Select proper needle & thread for fabric
19. Is needle clamping screw loose?
19. Tighten needle set screw
20. Is the fabric pulled while sewing?
20. Do not pull fabric while sewing
Fabric
fails to
feed
21. Is feed regulating dial properly adjusted?
21. Lengthen stitch length by feed regulating dial
22. Is presserfoot pressure adjusted properly?
22. Adjust correct presser toot pressure
Fabric
puckers
23. Is needle threading correct?
23. Correct needle threading
24. Is needle point blunt?
24. Insert new needle
25. Is thread tension too tight?
25. Adjust needle tension properly
Rotating
heavy
noise
25. Is there any lint or fluff on feed dog?
26. Remove lint & fluff from feed dog
27. Is there any lint in rolling hook?
27. Remove lint & fluff from rotating hook
Machine
fails to
start
28. Are electrical plugs properly connected?
28. Turn on power switch
29. Is power & light switch turned on?
29. Connect plug to power source
If you still have difficulty in sewing even after making adjustments, contact your nearest Service Center.
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