SINGER 14U52 - Manual (Page 21)

8. How to sew three-thread ultra-stretch mock safety stitch
The 3-thread ultra-stretch is sewn with two needles, one looper and a spreader.
(1) Convert right looper into spreader (see page 10)
(2) Thread left looper (yellow path) (see page 11)
(3) Thread right needle (green path) |
(4) Thread left needle (blue path) | • • (see page 12)
(5) Correct thread tensions for 3-thread ultra-stretch
Set each tension dial to setting shown below
and test sew on a sample of your fabric.
Fabric
Tension Dial
Blue Green Orange Yellow
Light weight 2.5 1.5 Spreader 1.0
Medium weight 3.0 1.5 Spreader 1.0
Heavy weight 4.5 2.5 Spreader 1.0
Be sure the threads are correctly threaded otherwise
proper tension cannot be obtained.
Adjust thread tensions to suit your fabric making reference to table below. Make adjustments in
increments of no greater than half a number at a time.
When looper thread is too
loose.
Right needle thread
Topside
Left
looper
th read
Underside
Turn looper thread tension
dial (yellow) toward the (+)
mark.______________________
When left needle thread is too
loose.
Right needle thread
Left needle
thread
Topside
Left
looper
thread
Underside
Turn left needle thread ten­
sion dial (blue) toward the (+)
mark.
When right needle thread is
too loose.
Right needle thread
Left needle
thread
Topside
Left
looper
thread
Underside
Turn right needle thread ten­
sion dial (green) toward the
(+) mark.
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