z
e
q
w
x
c
t
y
4
r
4
4
e
w
q
22
Balancing Needle Thread Tension
z Correct tension
The thread tension is adjusted depending
on the sewing materials, layers of fabric
and sewing method.
The ideal straight stitch has threads
locked between two layers of fabric as
illustrated.
For an ideal zigzag stitch, the bobbin
thread does not show on the right side
(top side) of the fabric, and the needle
thread shows slightly on the wrong side
(bottom side) of the fabric.
q Needle thread (Top thread)
w Bobbin thread (Bottom thread)
e Right side (Top side) of fabric
r Wrong side (Bottom side) of fabric
t Thread tension dial
y Setting mark
x Needle thread tension is too tight
When the bobbin thread (bottom thread)
will appear on the right side (top side) of
the fabric, Loosen the needle thread
tension by moving the dial to a lower
number.
c Needle thread tension is too loose
When the needle thread (top thread) will
appear on the wrong side (bottom side) of
the fabric, tighten the needle thread
tension by moving the dial to a higher
number.
• Adjust bobbin tension
In some instances, you may need to adjust
the bobbin thread tension.
Turn the adjusting screw q in the direction
of w when the bobbin thread tension is too
tight.
Turn the adjusting screw q in the direction
of e when the bobbin thread tension is too
loose.
q Adjusting screw
w Decrease tension
e Increase tension