Operation Manual

rertormance
problems
w
‘3
Problem
Probable
cause
Possible
correction
Fabric
does
not
move
-
Feed
dog
down
-
Raise
feed
dog
-
Stitch
length
dial
on
0
Set
dial
.between
1
and
4
-
Light
presser
foot
pressure
-
Increase
pressure
Breaking
needle
Incorrect
insertion
of
needle
-
Re-insert
needle
-
Bent
needle
-
Replace
needle
-
Fabric
is
pulled
-
Do
not
pull
fabric
-
Needle,
thread
and
fabric
-
Use
correct
needle
and
thread
do
not
match
Breaking
upper
thread
-
Improper
threading
-
Re-thread
machine
-
Tight
upper
thread
tension
-
Loosen
upper
thread
tension
-
Needle
bent
-
Insert
new
needle
-
Nicks
or
burrs
on
stitch
plate
-
Polish
of
burrs
or
replace
stitch
opening
plate
Breaking
bobbin
thread
-
Tight
bobbin
thread
tension
-
Loosen
bobbin
thread
tension
-
Improper
threading
-
Re-thread
machine
-
Incorrect
insertion
of
needle
-
Re-insert
needle
-
Lint
or
thread
in
shuttle
-
Clean
shuttle
Machine
jamming
-
No
oil
-
Oil
Knocking
noise
-
Damaged
needle
-
Replace
needle
-
Thread
caught
in
shuttle
-
Clean
shuttle
Puckering
-
Thread
tension(s)
too
tight
-
Loosen
tension(s)
-
Presser
foot
pressure
too
tight
-
Adjust
pressure
-
Needle,
thread
and
fabric
do
not
-
Use
correct
needle
and
thread
match