Brother LS 1520 - Manual (Page 54)

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46
PERFORMANCE CHECK LIST
FABRIC PUCKERS LOOP IN SEAM SKIPPED STITCHES
LOWER (BOBBIN)
THREAD BREAKS
UPPER THREAD
BREAKS
Thread tension is
too tight.
Thread tension is
incorrect.
Needle is
incorrectly
inserted.
Upper thread is
not correctly
installed.
Lower (bobbin)
thread is tangled.
▼ ▼ ▼
▼
Page 17
▼
Page 16
No No
Pages 20-21 Page 6
No
▼
Pages 20-21
No
▼ ▼
▼
Page 14
▼
Page 16
No No
Page 6
▼
Pages 12-17
No
Upper thread is
tangled.
Bobbin is not
threaded
properly in the
shuttle hook.
Damaged or worn
needle is used.
Threading is not
correct.
▼
▼ ▼
▼
Page 21
▼
Page 20
No No
Page 22
▼
Page 6
No
▼
▼ ▼
Page 14 Page 12
No No
Pages 43-45
▼
Page 22
No
▼
▼
Upper thread
tension is too
tight.
Lower thread
tension is too
tight.
Spool of thread
is not correctly
installed.
Lower threading
is not correct.
The combination
of needle size/
thread size/fabric
is incorrect.
Lint is clinging to
the bottom of the
needle plate.
Wrong needle is
used.
The combination
of needle size/
thread size/fabric
is incorrect.
▼
Page 6
No
▼
Page 22
No
Needle is bent
or not sharp.
▼
Page 16
Threading is not
correct.
The combination
of needle size/
thread size/fabric
is incorrect.
▼
▼
▼
▼
▼
▼
▼
▼
▼
▼
▼
▼ ▼ ▼
No
No
No
No
No
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