25. TROUBLESHOOTING CHART Problem
Page
Fabric does not feed well
- Lengthen stitch length. - Increase presser foot pressure for heavy weight fabric. - Decrease presser foot pressure for light weight fabric.
45 47 47
Needle breaks
- Insert needle correctly. - Do not pull fabric while sewing. - Tighten needle set screw. - Use a larger needle on heavy fabrics.
25 59 25 17
Thread breaks
- Check threading - Check for tangled or caught thread - Insert needle correctly - Insert new needle, current needle may be bent or have a blunt point. - Use a high quality thread. - Loosen thread tension.
27 ~ 41 43 25 17
- Insert new needle, current needle may be bent or have a blunt point. - Tighten needle set screw. - Insert needle correctly. - Change type or size of needle. - Check threading. - Increase presser foot pressure. - Use a high quality thread.
17 25 25 17 27 ~ 41 47 96
Irregular stitches
- Balance thread tension. - Check for tangled or caught thread. - Check threading.
61 ~ 71 43 27 ~ 41
Fabric puckers
- Loosen thread tension. - Check for tangled or caught thread - Use high quality light weight thread. - Shorten stitch length. - Decrease presser foot pressure for light weight fabrics.
61 ~ 71 43 96 45 47
Irregular trimming
- Check alignment of knives. - Replace one or both knives.
89 89
Fabric jams
- Close looper cover before sewing. - Check for tangled or caught thread. - Compress thick layers of fabric with conventional machine before sewing with overlock.
21 43
Machine does not operate
- Connect machine to power source.
21
Stitches skip
93
Solution
96 61 ~ 71