Looper thread tension is out of balance (1)
The illustration shows sewing results when the lower
looper thread tension is too tight and/or upper looper
thread tension is too loose.
38
Remedy:
Loosen lower looper thread tension and/or tighten upper
looper thread tension.
q
Wrong side of fabric
w
Right side of fabric
e
Right needle thread
r
Left needle thread
t
Upper looper thread
y
Lower looper thread
! 3
Upper looper thread tension dial
! 4
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 tighten
the lower looper thread tension.
! 3
Upper looper thread tension dial
! 4
Lower looper thread tension dial
q
w
e
r
t
y
! 3
! 3
! 4
! 4
q
w
e
r
t
y