Singer 14SH644 User Manual

44
- Lengthen stitch length.
- Increase presser foot pressure for heavy weight fabric.
- Decrease presser foot pressure for light weight fabric.
- Insert needle correctly.
- Do not pull fabric while sewing.
- Tighten needle set screw.
- Use a larger needle on heavy fabrics.
- 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.
- 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.
- Balance thread tension.
- Check for tangled or caught thread.
- Check threading.
- 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.
- Check alignment of knives.
- Replace one or both knives.
- Close looper 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.
Fabric does not feed
well
Needle breaks
Thread breaks
Stitches skip
Irregular stitches
Fabric puckers
Irregular trimming
Fabric jams
Machine does not
operate
21
22
22
11
28
11
7
12 ~ 19
20
11
7
45
29 ~ 34
7
11
11
7
12 ~ 19
22
45
29 ~ 34
21
12 ~ 19
29 ~ 34
20
45
21
22
43
43
9
20
9
25. TROUBLESHOOTING CHART
Problem Solution Page

Singer 14SH644 Specifications

General

Type	Automatic sewing machine
Free arm	Yes
Sewing speed	1300
Stitch width	Variable
Product color	White
Automatic buttonhole	-
Sewing machine functions	Overlock
Power supply type	Electromechanical

Weight and Dimensions

Width	320 mm
Height	380 mm
Weight	7500 g