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Tensions
For ordinary stitching the needle and bobbin
threads should be locked in the centre of the
thickness of the material, thus:
FIG. 13. PERFECT STITCH
If the tension on the needle thread is too
tight, or if that on the bobbin thread is too
loose, the needle thread will lie straight along
the upper surface of the material, thus:
FIG. 14. TIGHT NEEDLE THREAD TENSION
If the tension on the bobbin thread is too tight
or if hat on the needle thread is too loose, the
bobbin thread will lie straight along the under
side of the material, thus:
FIG. 15. LOOSE NEEDLE THREAD TENSION
Table of Contents
82387 No. 66
To Regulate the Tensions
The tension on the needle thread should only
be regulated when the presser foot is down.
Having lowered the presser foot, turn the
small thumb nut (E, shown in Fig. 16, above,
and Fig. 5, page 6) at the front of the tension
discs over to the right to increase the tension.
To decrease the tension, turn the thumb nut
over to the left.
FIG 16. NEEDLE THREAD TENSION
The tension on the bobbin thread is regulated
by the larger screw (Fig. 4) which is nearest
the back in the bobbin case tension spring.
To increase the tension, turn the screw over
toward you. To decrease the tension, turn the
screw over from you.
When the tension on the bobbin thread has
been once properly adjusted it is seldom nec-
essary to change it, as a correct stitch can
usually be obtained by varying the tension on
the needle thread.
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