2022-Ultrafeed LSZ Guidebook - Flipbook - Page 44
There are thread loops on the underside of
the material
Thread pulls out of the needle eye when
starting to sew
A tangle on the bottom side of the application means
there is not enough upper tension. More than likely,
the thread is not being pulled snugly between the
tension disks (p. 33, E and F) on the Upper Tension
Assembly or is not between them at all.
Confirm that the needle eye is threaded from left to right (p.
15, O). Then pull out a longer thread tail and trap it with your
finger to the bed of the sewing machine (A). Release the
thread tail after the first few stitches.
1. Lift the presser foot to push the two
upper tension disks apart.
2. Firmly pull the thread against the
center shaft between the disks.
A rat’s nest forms in the first few inches of
sewing and then clears up
Eliminate this issue by trapping the thread tails (A) from the
needle and the bobbin as you start to sew.
3. Drop the presser foot. The disks should close
on the thread creating plenty of tension. Gently
pull on the thread to feel the tension.
4. If this did not solve the problem, pull the cover
knob off the Upper Tension Assembly and turn
the knob found underneath to the point where
its outer surface has three threads of the tension
post showing. Then repeat steps 1-3.
Thread loops could also be caused by a burr on the retaining
ring cap spring (p. 40, 59, B). Remove any burrs by polishing
them with emery paper or a fine file. If badly damaged,
replace with a new retaining ring cap spring (#160311).
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A
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