Blind stitch selector [model 415, Controls, Adjusting thread tensions – SINGER W426 User Manual
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BLIND STITCH SELECTOR [MODEL 415]
Automatic blind hem stitching and Pine-leaf stretch
hem stitching is available on Model 415 with blind
stitch selector to the left. The former is made with
stretch stitch lever at M and the latter is with it at S.
For both, stitch width control should be at 0.
In ordinary stitching, this control be at M position. In shifting the control to
position, lift the control up a little bit, then shift it to the right.
ADJUSTING THREAD TENSIONS
Always adjust the upper thread
tension with the presser foot down, ^
as the tension is released when it is
raised. To increase the tension on
control to the right. To decrease,
turn to the left. Before adjusting
machine is threaded properly.
It is seldom required to adjust
however, when necessary to change
bobbin thread tension, turn |Riall
screw on side of the bobbin'*^cafe
clockwise to tighten , counterclock
wise to lobsen.
When both tensions are properly
balanced, a perfect stitch will be
formed with both threads interlock
ing in fabric (A).
When the upper tension is too tight,
the bobbin thread is pulled up over
the upper thread which is lying flat
on the fabric (B).
When the upper tension is too
loose, the upper thread forms loops
over the bobbin thread lying flat on
the fabric (C).
When the upper and bobbin thread
tensions are balanced but fabric is
puckered in sewing direction on
sheer fabrics, both tensions are too
tight. Loosen both tensions evenly.
It is recommended to adjust the
stitch length. In case of satin
stitching for buttonholes and em
broidery, slightly loosen the upper
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