Singer 1 One Instruction Manual 40 - Page 22

9. How to sew four-thread ultra-stretch mock safety stitch The 4-thread ultra-stretch is sewn with two needles and two loopers. Thread right looper (orange path) (see page 15) Thread left looper (yellow) (see page 11) Thread right needle (green path) Thread left needle (blue path) • • Correct thread tensions for 4-thread ultra-stretch. (see page 12) Right looper th read Be sure the threads are correctly threaded otherwise proper tension cannot be obtained. Right needle thread Left needle thread Topside Left looper thread Underside Right needle thread tension dial (green) Left needle thread tension dial (blue) Right looper thread tension dial (orange) Left looper thread tension dial (yellow) Set each tension dial to settings shown below and test sew on a sample of your fabric. Fabric Light weight Medium weight Heavy weight Blue 1.5 2.0 2.5 Tension Dial Green Orange Yellow 1.5 1.0 1.5 1.5 1.5 1.5 2.0 2.0 1.5 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 right looper thread lies on the underside of fabric. Right looper thread When left looper thread appears on the top. -N1 Right 'milder thread Right needle thread Left needle thread Topside \ Left looper thread s•if Underside Turn right looper thread tension dial (orange) toward the (+) mark. Or, turn left looper thread tension dial (yellow) toward the (-) mark. When left needle thread tension is too loose. Right needle thread Left needle thread Right looper thread Left looper thread Topside If6'j' ' r Underside Turn left needle thread tension dial (blue) toward the (+) mark. Right needle th read Left needle thread Left looper thread Topside Underside Trun left looper thread tension dial (yellow) toward the (+) mark. Or, turn right looper thread tension dial (orange) toward the (-) mark. When right needle thread tension is too loose. Right looper thread Right needle thread Left needle thread Left looper thread Topside Underside Turn right needle thread tension dial (green) toward the (+) mark. 20