White 1620 - Troubleshooting Sewing Problems; Fabric Movement Issues; Needle Breakage Solutions; Thread Breakage Troubleshooting

I-
C,-,
C
CHECKING
PERFORMANCE
PROBLEMS
WHAT
TO
DO
PROBLEM
PROBABLE
CAUSE
CORRECTION
—
Feed
dog
down.
—
Raise
feed
dog.
Fabric
flOt
—
Machine
not
moving.
—
Moving
stop
motion.
moving
—
Stitch
length
dial
in
0
position.
—
Moving
dial
to
1-4.
—
Light
pressure
on
presser
foot.
—
increase
pressure
on
presser
foot.
—
Incorrect
setting
of
needle.
—
Reset
needle.
.
—
Needle
bent.
—
Replace
new
needle.
Breaking
Needle
—
Pullinj
fabric.
—
Do
not
pull
fabric.
—
Incorrect
using
needle,
thread
and
fabric.
—
Correct
using
needle,
thread,
and
fabric.
—
Incorrect
position
of
zigzag
width
dial.
—
Moving
to
correct
position.
—
Improper
threading.
—
Rethread
machine.
Breaking
Upper
—
Tight
upper
thread
tension.
—
Loosen
upper
thread
tension.
Thread
—
Needle
bent.
—
Replace
new
needle.
—
Nicks
or
burrs
on
shuttle.
—
Replace
shuttle,
or
polish
off
burrs
completely.
—
Tight
bobbin
thread
tension.
—
Loosen
bobbin
thread
tension.
Breadkin
Bobbin
—
Incorrect
stting
of
needle.
—
Reset
needle.
Thread
—
Improper
threading.
—
Rethread
machine.
—
Dust
and
thread
in
shuttle.
—
Clean
shuttle.
Machine
Jamming
—
No
oil.
—
Need
oil.
Knocking
Noise
—
Dust
and
thread
in
shuttle.
—
Clean
shuttle.
—
Tension
too
tight.
--
Reset.
Puckering
—
Sewing
foot
pressure
too
strong.
—
Regulating
sewing
foot
pressure.
—
Incorrect
using
fabric,
needle,
and
thread.
—
Correct
using
fabric,
needle
and
thread.