Singer 1 One Instruction Manual 40 - Page 21
three, thread, ultra, stretch, safety, stitch
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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) 0 • (5) Correct thread tensions for 3-thread ultra-stretch (see page 12) Right needle thread Be sure the threads are correctly threaded otherwise proper tension cannot be obtained. Left needle thread Left looper thread Topside Underside Set each tension dial to setting shown below and test sew on a sample of your fabric. Left needle thread tension dial (blue) Right needle thread tension dial (green) Left looper thread tension dial (yellow) Tension Dial Fabric Blue Green Orange Yellow N° 9 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 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 When left needle thread is too loose. Right needle thread When right needle thread is too loose. Right needle thread Left needle thread Left Topside =₹ lOoper thread Underside Turn looper thread tension dial (yellow) toward the (+) mark. Left needle thread t k._ 4.. -. =4 \ Left looper Topside 4 thread Underside Turn left needle thread tension dial (blue) toward the (+) mark. Left needle thread Topside _ t 4° tf."' \Left looper ifr thread Underside Turn right needle thread ten- sion dial (green) toward the (+) mark. 19
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