Operation Manual

9
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PROBLEM
PROBABLE
CAUSE
CORRECTION
-
Feed
dog
down.
Raise
feed
dog.
Fabric
not
-
Machine
not
moving.
Tight
stop
motion.
moving
.
Stitch
length
dial
in
o
position.
-
Moving
dial
to
1
-4.
-
Light
pressure
on
presser
foot.
-
Increase
pressure
on
presser
foot.
-
Incorrect
setting
of
needle.
-
Reset
needle.
Breaking
Needle
-
Needle
bent.
-
Fit
new
needle.
•
Pulling
fabric.
-
Do
not
pull
fabric.
-
Incorrect
use
of
needle,
thread
-
Correct
use
of
needle,
thread
or
fabric,
or
fabric.
-
Improper
threading.
-
Re-thread
machine.
Breaking
Bobbin
-
Tight
upper
thread
tension.
-
Loosen
upper
thread
tension.
Thread
-
Needle
bent.
Fit
new
needle.
-
Nicks
or
burrs
on
shuttle.
-
Replace
shuttle,
or
polish
off
burrs
completely.
Machine
Jamming
-
No
oil.
Needs
oiling.
Knocking
Noise
-Dust
and
thread
in
shuttle.
-
Clean
shuttle.
-
Tension
too
tight
-
Reset.
Puckering
-
Sewing
foot
pressure
too
strong.
-
Adjust
sewing
foot
pressure.
-
Incorrect
use
of
fabric,
and
-
Use
correct
fabric,
needle
and
thread.
thread.
3’
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“4 (a,
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I
N
CHECKING
PERFORMANCE
PROBLEMS
WHAT
TO
DO