Thread Tension (3 threads)
Correct tension
The illustration to the left shows a seam sewn at the
correct tension. Note that you may need to adjust the
thread tension depending on the fabric and thread being
used.
q
Wrong side of fabric
w
Right side of fabric
e
Right or left needle thread
r
Upper looper thread
t
Lower looper thread
q
w
e
r
t
y
39
u
i
o
q
w
e
r
t
! 0
! 1
q
w
e
r
t
! 2
! 3
q
w
e
r
t
! 2
! 3
Thread tension adjustment
Set the three thread tension dials to
“3”.
Sew and check the thread tension.
If the tension on the test piece is not satisfactory, you can
adjust the thread tension with the thread tension dial.
y
Thread tension dial
u
Setting mark
i
Loosen
o
Tighten
Needle thread tension is too loose
The illustration to the left shows a seam sewn when the
left needle thread tension is too loose.
Remedy:
Tighten the needle thread tension.
! 0
Left needle tension dial
! 1
Right needle tension dial
Looper thread tension is out of balance (1)
The illustration to the left shows a seam sewn when the
lower looper thread tension is too tight and/or the upper
looper thread tension is too loose.
Remedy:
Loosen the lower looper thread tension and/or tighten the
upper looper thread tension.
! 2
Upper looper thread tension dial
! 3
Lower looper thread tension dial
Looper thread tension is out of balance (2)
The illustration to the left shows a seam sewn when the
upper looper thread tension is too tight and/or the lower
looper thread tension is too loose.
Remedy:
Loosen the upper looper thread tension and/or the tighten
lower looper thread tension.
! 2
Upper looper thread tension dial
! 3
Lower looper thread tension dial
