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Thread tension
12
BA
C
D
4
Upper thread tension
Lower thread tension
Please note:
Basic thread tension setting: "4"
To increase the tension, turn the dial to the next number up.
To reduce the tension, turn the dial to the next number down.
A. Normal thread tension for straight stitch sewing.
B. Thread tension too loose for straight stitch sewing. Turn dial to higher
number.
C. Thread tension too tight for straight stitch sewing. Turn dial to lower
number.
D. Normal thread tension for zig zag and decorative sewing. Correct thread
tension is when a small amount of the upper thread appears on the bottom
side of fabric.
To test the bobbin thread tension, remove the bobbin case and bobbin and
hold it by suspending it by the thread. Jerk it once or twice. If the tension is
correct, the thread will unwind by about an inch or two. If the tension is too
tight, it does not unwind at all. If the tension is too loose, it will drop too much.
To adjust, turn the small screw on the side of the bobbin case.
- Proper setting of tension is important to good sewing.
- There is no single tension setting appropriate for all stitch functions, thread
or fabric.
- A balanced tension (identical stitches both top and bottom) is usually only
desirable for straight stitch construction sewing.
- 90% of all sewing will be between "3" and "5" .
- For zig zag and decorative sewing stitch functions, thread tension should
generally be less than for straight stitch sewing.
- For all decorative sewing you will always obtain a nicer stitch and less
fabric puckering when the upper thread appears on the bottom side of your
fabric.