SINGER W1222 - Manual (Page 9)

No tension
Normol tension Tijht tension
Fig. 11
Fig- 13
rnf ^ .. .. 1 r' i------ - ....... r ___
^ J
(5^ :^\w
^ Firr l.R
A correct stitch can be obtained by varying the tension on the
needle thread. To adjust the tension of the needle thread, Lower
the pressure foot.
Adjust the tension regulator as the case demand, by refferring
to illustration. (Fig.ll) The quality of sewing depends on the
tension of thread. Therefore, it is necessary for the user to
become fully familiar with the correct tensions through practice.
Before adjusting lower tension be sure that the machine is
threaded properly. When necessary to change the bobbin tension,
turn small screw (Fig. 12) on side of the bobbin case clockwise
to tighten, counter-clockwise to loosen.
When the upper and lower tensions are properly balanced, a
perfect stitch will be formed with both threads interlocking in
fabric (Fig. 13).
When the upper tension is too tight, the lower thread is pulled
up over the upper thread which is lying flat on the fabric (Fig.
14).
When the upper tension is too loose, the upper thread forms
loops over the lower thread lying flat under the fabric (Fig. 15).
ADJUSTING THE TENSIONS