SINGER WK-100 - Manual (Page 10)

11. ADJUSTING UPPER THREAD TENSION
The correct stitch can usually be obtained by varying the upper thread tension.
NOTE : TENSION ADJUSTMENT SHOULD BE MADE WITH THE
PRESSER FOOT DOTO.
To increase the tension, turn the tension dial clockwise (Fig. 20). To decrease
the tension, turn the tension dial counter clockwise (Fig. 20). When the tension
is properly adjusted, the upper and lower threads will cross in the center of
the material (Fig. 21-A).
When the upper thread tension is too tight, or the bobbin tension is too loose,
the lower thread will lay flat along the top of the material (Fig. 21-B).
When the upper thread tension is too loose or the bobbin tension too tight, the
upper thread will lay flat along the bottom of the material (Fig. 21-C).
The tension should be adjusted little by little until the desired tension is obtained.
0
Bj
Fig. 20 Fig. 21
12. ADJUSTING BOBBIN THREAD TENSION .
1. The bobbin thread tension on your machine is correctly adjusted before leaving
the factory. Therefore, it is seldom necessary to alter the bobbin thread tension.
Should it become necessary to do so,
the adjusting screw of the tension spring
on the outside of the bobbin case can
be tightened or loosened to increase or
decrease the tension of the bobbin
thread.
2. To increase the bobbin thread tension,
turn the adjusting screw clockwise.
To decrease tension of the bobbin
thread, turn the adjusting screw counter
clockwise.
Fig. 22
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