White 310 - Problem and Remedies; Machine Sticking; Skipped Stitches; Irregular Stitches

PROBLEM
AND
REMEDIES
— Trouble
Probable
Cause
____
Remedies
The machine
sticks
Thread or
lint
in
the shuttle
.
Clean and oil
the machine
and the
shuttle
jook.
— jL
(seepage34(.
Skipped
stitches
rBent
needle
RpIace with
new needle
(see
page
8).
Needle
placed incorrectly
Fit the needle
correctly
(see page
8).
in the clamp.
Place
a piece
of
paper beneath
the
fabric,
or use the
Ball
Point
Needle.
1
Rghten
the upper
tension
Incorrect
threading
See
threading
instructions,
page 11.
[Bobbin
not wound
evenly_Jjust
the
bobbin
winder
(see
page 10).
1
Material is being
held
back
Avoid pulling
or holding
the material
just
or pulled.
guide it.
Upper
thread
tension not
tight enough.
Poor quality
thread.
Needle too
fine
for the
J
thread being
used.
Refer
to the
threading
instructions on
page
11
and
rethread the
machine.
Refer
to
the
needle
fitting
instructions
on
page
8.
Try
a
new needle.
Throw
away all blunt
or bent
needles and
replace
with new
needles.
See tension
adlustment
recommendations
on
page
15.
Incorrect
feedinl]
runt
in the feed
dog.
rRemove
the
needle plate and
clean lint
i
L
- _J
[rom the
feed dog.
Loosen the
upper thread
tension
(see
page
15).
Replace the
needle or
thread
so
that
they
are
correctly
matched
(see page
7).
Too
fine
a needle
for
the
thread
being
used.
Too
stretchy
fabric.
Irregular
stitches
Upper thread
tension too
loose.
Uneven
stitches
Upper thread
breaks
Increase
the tension.
Try
a
different thread.
See the
needle and thread
chart,
page
7,
Always
Start sewing with
the
take-up
lever
in its highest
position.
Incorrect
threading.
Tension too
tight.
Sewing is
started
with the
take-up
lever
in the wrong
position.
Needle fitted
incorrectly.
Eye
of the
needle bent or
too sharp.
aent
or blunt
needle.
Material puckers
Tensions
too tight.
Dull needle.
J
Ltc
length too
long.
Machine is noisy
1
Stitch length control
is set
and
material is
not
at
other
than the
*
mark.
fed
when stretch
.
stitches
are
[
Change
the
needle.
educe the
stitch
length.
______________
Set stitch
length
control
at
the
*
mark.
35