Tabla de contenido
Publicidad
c
a
b
e
f
d
c
a
b
d
a
c
b
Fig. 1
d
Fig. 2
e
Fig. 3
f
Fig. 4
Adjusting the Needle Thread Tension
Thread Tension:
Note: The bobbin thread tension has been adjusted at the
factory and readjustment is not usually required.
Lower thread tension:
-
To test the bobbin thread tension, remove the bobbin
case with the bobbin from the sewing machine and hold
the bobbin case suspended by the thread. Shake it
once or twice.
-
If the tension is correct, the thread will unwind by about
an inch or two.
-
If the tension is too tight, it will not unwind. If the tension
is too loose, the thread will unwind more than two
inches.
-
To adjust the tension, turn the small screw on the side
of the bobbin case. (Fig. 1)
Upper Thread Tension:
Balanced tension:
-
The ideal straight stitch has threads locked between two
layers of fabric. (Fig. 2)
a.
Needle thread
b.
Bobbin thread
c.
Right side (top side) of fabric
d.
Wrong side (under side) of fabric
-
To adjust the tension, turn the tension dial up to loose
and down to tighten.
e.
To loosen
f.
To tighten
-
The tension requires adjustment depending on:
-
Stiffness and thickness of fabric
-
Number of fabric layers
-
Type of stitch
Tension is too tight:
-
If the bobbin thread shows through on the right side (top
side) of the fabric, turn the tension dial to a lower
tension setting to loosen the needle thread tension.
(Fig.3)
a.
Needle thread
b.
Bobbin thread
c.
Right side (top side) of fabric
d.
Wrong side (under side) of fabric
e.
Turn up to loosen
Tension is too loose:
-
If the needle thread shows through on the wrong side
(under side) of the fabric, turn the tension dial to a
higher tension setting to tighten the needle thread.
(Fig. 4)
a.
Needle thread
b.
Bobbin thread
c.
Right side (top side) of fabric
d.
Wrong side (under side) of fabric
f.
Turn down to tighten
19
Publicidad
Tabla de contenido
