SINGER 216G - Manual (Page 27)

To Regulate Thread Tensions (Fig. 22)
The tension under which the threads are sewn is of
the greatest importance for the appearance of the
stitches and the firmness of the seam. Some goods
or types of work require
more and some less
tension, therefore, the
operator must become
acquainted with the
regulating of the ten­
sions.
The correct stitch can
generally be produced
simply by regulating
the needle thread ten­
sion only.
This tension can be
changed only when the
presser
foot is down.
By turning the regulat­
ing thumb nut (M,
Fig. 22) the tension of
the needle thread can be increased or decreased. If
the thumb nut (M) is turned to the right, to the plus
sign, the higher numbers will be indicated by the
indicator mark (Z), that is, the tension will be in­
creased. If the tension is to be decreased, the thumb
nut (M) must be turned toward the left to the minus
sign, so that the lower numbers appear opposite the
mark (Z). By noting the number at the indicator mark,
the previously set tension can quickly be reset every
time a change is required.
Fig. 22 To Regulate the Tensions
The tension on the bobbin thread is properly set by
the fabric and except for exceptional cases does not
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