White W445 - Troubleshooting Guide

CHECKING
PERFORMANCE
PROBLEMS
— TROUBLESHOOTING
Problem
Probable
cause
What
to
do
- Feed
teeth
down
-
Raise
feed
teeth
Fabric
does
not
-
Stitch
length
dial
position
- Set
dial
between 1
and
4
move
- Light
presser
foot
pressure
- Increase
pressure
-
Incorrect
insertion
of
needle
- Re-insert
needle
- Bent
needle
- Replace needle
Breaking
needle
-
Fabric
is
being
pulled
-
Do not
pull
fabric
- Needle,
thread
and
fabric
do - Use
correct
needle
and
thread
not
match
-
Faulty
adjustment
of zigzag
width
- Re-adjust
zigzag
width
Breaking
upper
-
Improper
threading
- Re-thread
machine
thread
-
Tight
upper
thread
tension
- Reduce upper
thread
tension
- Bent
needle
-
Scratches or
nicks
on bobbin
-
Replace
needle
- Polish
or replace
bobbin
case
case
- Tight
bobbin
thread
tension
- Reduce
bobbin
thread
tension
Breaking
bobbin
- Incorrect
insertion of
needle
- Re-insert needle
thread
- Improper threading
-
Rethread
machine
-
Lint
or thread
in bobbin
case
-
Clean
bobbin
case
-
Excessive
tension
-
Re-adjust
tension
-
Presser
foot
pressure
too
-
Reduce
pressure
accordingly
Machine
strong
- Needle,
thread
and
fabric
do
- Reduce
proper
needle
and
jamming
not
match
thread
according
to
type
of
fabric
- No
oil
- Oil
moving
parts
-
Tension
too
tight
-
Reset
- Sewing
foot
pressure
too
- Reduce
sewing
foot
pressure
Puckering
strong
- Incorrect
fabric,
needle,
- Use
correct
fabric,
needle
and
thread
and
thread
37 -