SINGER 14U285B - Manual (Page 27)

11. How to sew four-thread safety stitch
The 4-thread safety stitch is sewn with two needles, two loopers and a spreader.
( 1 ) Convert right looper into spreader (see page 14)
( 2 ) Thread left looper (yellow path) (see page 15)
( 3 ) Thread chainstitch looper (purple path) (see page 12)
( 4 ) Thread right overedge needle (green path) |
( 5 ) Thread chainstitch needle (blue path) |
( 6 ) Correct thread tensions for 4-thread safety stitch
O
(see page 16)
(see page 12)
Be sure the threads are correctly threaded otherwise
proper tension cannot be obtained.
Set each tension dial to settings shown below and test sew on a sample of your fabric.
Chainstitch needle thread tension dial (blue)
Overedge Right needle thread tension dial (green)
Left hand looper thread tension dial
(yellow)
Chainstitch looper thread
tension dial (purple)
Fabric
Tension Dial
Blue Green Orange' Yellow Purple
Light weight 3.5 0.5
1
Spreader
4.0 1.0
Medium weight 3.5 1.0
Spreader
3.0 1.5
Heavy weight 6.0 1.0 Spreader 5.0 2.0
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 left looper thread lies on
the underside of fabric.
Overedge
needle
■ thread
Left looper
thread
Topside
Underside
Turn left looper thread tension
dial (yellow) toward the (-I-)
mark.
Or, turn overedge needle thread
tension dial (green) toward the
(—) mark.
When left looper
appears on the top.
Left looper
thread
th read
Overedge
needle
thread
Topside Underside
Turn left looper thread tension
dial (yellow) toward the (—)
mark.
Or, turn overedge needle thread
tension dial (green) toward the
(+) mark.
When chainstitch
thread is too loose.
needle
Chainstitch
needle thread
Topside
j|!^Chain-
stitch
fr ^ looper
thread
Underside
Turn chainstitch needle thread
tension dial (blue) toward the
{+) mark.
Or, turn chainstitch looper
thread tension dial (purple)
toward the (—) mark.
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