Singer 1 One Instruction Manual 34 - Page 16
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(5) Correct thread tensions for 2-thread overedge Left looper thread Be sure the threads are correctly threaded otherwise proper tension cannot be obtained. Needle thread Topside Underside 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 1.0 Spreader 4.5 1.0 Spreader 4.5 2.0 Spreader 6.0 • When using left needle for sewing wide overedge seams, be sure to remove right needle. Fabric Light weight Medium weight Heavy weight Blue 1.0 1.5 1.5 Tension Dial Green Orange Yellow Spreader 3.5 Spreader 3.5 Spreader 3.5 Left needle thread tension dial (blue) Right needle thread tension dial (green) 2lam 3 3 ♦ 2 Left looper thread tension dial (yellow) 2 3 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. 1 When looper thread lies on the underside of fabric When looper thread appears on the top Left looper thread Needle thread Topside Underside Turn looper thread tension dial (yellow) toward the (+) mark. Or, turn needle thread tension dial (blue or green) toward the (-) mark. 14 Left looper thread Needle thread Topside Underside Turn looper thread tension dial (yellow) toward the (-) mark. Or, turn needle thread tension dial (blue or green) toward the (+) mark.
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