Singer 1 One Instruction Manual 34 - Page 15
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(4) Correct thread tensions for 2-thread wrapped edge overlock. Needle thread Be sure the threads are correctly threaded otherwise proper tension cannot be obtained. Left looper thread Topside Underside 1 Set each tension dial to settings shown below and test sew on a sample of your fabric. • When using right needle for sewing normal width overedge seams, be sure to remove left needle. Fabric Light weight Medium weight Heavy weight Blue Tension Dial Green Orange Yellow 4.0 Spreader 2.0 5.5 Spreader 2.0 6.5 Spreader 3.0 • When using left needle for sewing wide overedge seams, be sure to remove right needle. Right needle thread tension dial (green) Left needle thread tension dial (blue) 2 3 3 2 4 Left looper thread tension dial (yellow) 2 A 3 V 4 • Fabric Light weight Medium weight Heavy weight Blue 4.5 6.0 8.5 Tension Dial Green Orange Yellow Spreader 1.0 Spreader 1.0 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 tight or needle thread is too loose When looper thread is too loose Needle thread N N Left looper thread Topside Underside Turn looper thread tension dial (yellow) toward the (-) mark. Or, turn needle thread tension dial (blue or green) toward the (+) mark. Needle thread Topside Left looper thread Underside Turn looper thread tension dial (yellow) toward the (+) mark. 13
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