Operation Manual

26.
TROUBLESHOOTING
CHART
Problem
Solution
Page
Fabric
does
not
—
Lengthen
stitch
length
feed
well
—
Increase
presser
foot
pressure
for
heavy weight
fabric
—
Decrease
presser
foot
pressure
for
light
weight
fabric
—
Insert
needle correctly
—
Do
not
pull
fabric
while
sewing
—
Tighten
needle
set
screw
—
Use
a
larger
needle
on
heavy
fabrics
—
Check
threading
—
Check
for
tangled
or
caught
thread
—
Insert
needle
correctly
—
Insert
new
needle,
current
needle may
be
bent or
have
a blunt
point
—
Use
a
high
quality
thread
—
Loosen
thread
tension
—
Insert
new
needle,
current
needle
may
be
bent
or
have
a
blunt
point
—
Tighten
needle
set
screw
—
Insert
needle correctly
—
Change
type
or
size of
needle
—
Check threading
—
Increase
presser
foot
pressure
—
Use
a
high
quality
thread
—
Loosen
thread tension
Check for
tangled
or
caught
thread
—
Use
high
quality
light
weight
thread
—
Shorten
stitch length
—
Decrease
presser
foot
pressure
for
light
weight
fabrics
—
Check alignment
of
knives
—
Replace
one
or
both
knives
Close
looper
cover
before
sewing
—
Check for
tangled
or
caught
thread
—
Compress
thick
layers
of
fabric
with
conventional
machine
before
sewing
with
overlock
Machine
does not
—
Connect
machine
to
power
source
operate
Needle
breaks
Thread
breaks
Stitches
skip
Irregular
stitches
Fabric
puckers
Irregular
trimming
Fabric jams
F
move
23
38
38
8
18
8
39
10—
17
22
8
8
39
19
—21
8
8
8
4
10—
17
38
39
19—
21
22
10—17
19—
21
22
39
23
38
41
41
6
22
6
—
Balance
thread
tension
—
Check for
tangled or
caught
thread
—
Check
threading
43