TROUBLE SHOOTING
This sewing machine is designed for trouble-free operation. However, the following chart
indicates trouble which may occur if basic adjustments are not made properly.
PROBLEM
SOLUTION
PAGE
Fabric does not feed
well
Needle
Thread breaks
Stitches skip
Irregular stitches
Fabric puckers
Irregular trimming
Fabric jams
Machine does not
operate
- Lengthen stitch length
- Increase presser foot pressure for heavy weight
fabric
- Decrease presser foot pressure for light weight
fabric
- Insert the needle correctly
- Do not pull fabric while sewing
- Tighten needle set screw
- Use a larger needle on heavy fabrics
- Check threading and threading sequence
- Check for tangled or caught thread
- Insert needle correctly
- Insert a new needle, current needle may be bent
or have a blunt point
- Use a high quality thread
- Loosen thread tension
- Insert a 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 and threading sequence
- Increase presser foot pressure
- Use a high quality thread
- Balance thread tension
- Check for tangled or caught thread
- Check threading and threading sequence
- Loosen thread tension
- Check for tangled or caught thread
- Use a high quality light weight thread
- Shorten stitch length
- Decrease presser foot pressure for light weight
fabrics
- Use differential feed
- Check alignment of knives
- Replace one or both knives
- Close front cover before sewing
- Check for tangled or caught thread
- Compress thick layers of fabric with conventional
machine before sewing with overlock
- Connect machine to power source
19
20
20
1
0
1
0
6
1
3-17
1
0
6
48
25-31
6
1
0
1
0
6
1
3-17
20
48
25-31
1
3-17
2
5-31
48
19
2
0
20
44
4
4
8
8
47