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Needle breaks.
*Fabric is being pulled or pushed against
machine feeding action. - Guide it gently.
*Needle size is not correct for thread and fabric.
-- See page 14.
*Needle is not all the way up into the needle
clamp (see page 13).
*Presser foot holder is not fastened securely.
- Retighten presser foot thumb screw.
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THREAD PROBLEMS
Thread bunches.
*Top and bobbin threads are not drawn back
under presser foot before star,ring seam,
- Draw both threads back under presser foot
about 4 inches and hold until a few stitches
are formed.
Needle thread breaks.
*Machine isstarted too fast. - Start to stitch at
a slow speed.
*Machine is not threaded Correctly. - See
page 15.
*Top thread tension is too tight. - Decrease
top thread tension.
*Needle size not correct for thread and fabric.
-- See page 14.
*Eye of needle has sharp edges. - Replace
needle.
*There are nicks or burrs at needle plate
opening. - Replace needle plate or smooth
burrs with extra fine Emory cloth.
Bobbin thread breaks.
*Bobbin case is not threaded correctly. -- See
page 12.
*Lint accumulates in bobbin case or shuttle.
- Remove lint (see page 55).
Fabric puckers.
*Top and bobbin thread tensions are too tight.
-- Adjust thread tensions (see page 17).
*Two different sizes or types of thread are used.
- Use same size and types of thread on top
and in bobbin.
*Needle is bent or blunt. - Replace needle.
*Stitch length is too long for sheer or soft fabric.
-- Shorten stitch length or use underlay of
tissue paper.
*Presser foot holder is not fastened securely.
- Retighten presser foot thumb screw.
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