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PROB LEM
Skipping
Stitches
Breaking Upper
Thread
Break ing Bobbon
Thread
Fab ric not
Movi ng
Machin
e
Jamm ing
(K
no
c
ki
ng No ise
WH AT
PR
OB
A
BL
E
CAUSE
Incorrect
size
needle.
Bent
or blunt need
le.
Incorrect setting of needle
.
Tight
cppe
r
thread tension.
Light pre ssure on
~resser
foot
.
Start
ing
to s titch too
fast.
Improper
threa
din
g.
Tight upper
thread
tension.
Inc
or
re
ct size
needl
e.
Sharp eye
in
needle.
Improper bobbin
ca
se
threading.
Tight
bobbin theod tension
.
lint
in bobbin
case
or
shuttle
.
Fee
d dog down.
light pressu
re
on ]:resser foot
.
Threads
kno
tt
ed under
Iabri
e.
Thread
caught in shutt
le.
TO
31
DO
CORRECTION
Choose correct size needle for thread and fabric
(
page 5
).
Insert new
needle
(
page
5
).
Reset needle
(
page 5
).
loosen
upper thread tension
(
page
12).
Increase
pressure on presser foot
(
page 1 0
)
.
Star
t to stitch
at
a mediu
m
speed.
Rethreod machine
(
page
9
).
loosen upper
thread tension
(
page
12).
Choose correct size
needle lor thread
and fa bric
(
page 5
)
Insert new needle
(
page 5
).
Check bobbin
case
threading
(
page 8
).
loosen
bobbin
thread tension
(
page
13).
Clean bobbin
ca
se
and
shuttle
(
page
28,
29).
Ra
ise
feed dog
(
page
15).
Increase
pressure
on
presser foot
(
page 1
0).
Place
both
threads back under
presse
r
loot before
beginning to
stit
ch
.
Disassemble
and clean
sh
uttle
(
page 28,
29)
.
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