Operation Manual

rrouble
shooting
Kinks
appear
on
top
and
bottom
of
material.
5.
Machine
feeds
irregularly
or
not
at
all
Lint
has
accumulated
between
tooth
rows
of
feed
dog.
Feed
dog
dropped.
(Reverse-feed
control
is
at
left.)
Remove
needle
plate
and
clean
out
lint.
Flick
reverse-feed
control
to
the
right.
Remove
thread
ends
and
put a
drop
of
oil
into
hook
raceway.
/
Cause:
4.
Seam
is
not
uniform
Tension
out
of adjustment.
Thread
too
thick,
knotty
or
hard.
Bobbin
thread
wound
unevenly.
Cause:
1.
Machine
skips
stitches
Needle
not inserted
correctly.
Wrong
needle
used.
Needle
bent
or
blunt.
Machine
threaded
improperly.
Needle
too
thin
for thread
used.
2.
Needle
thread
breaks
For
any
of
the above
reasons.
Thread
tension
too
strong.
Poor-quality
or knotty
thread
used.
or thread
that
has
become
too
dry by
excessive
storage.
3.
Needle
breaks
Needle
not
pushed
up
as
far as
it
will go.
Needle
bent.
Needle
too
thin or
too
thick.
Needle
bent
and strikes
needle
plate
because
work
is
pushed
or pulled.
Bobbin
case
improperly
inserted.
24
Remedy:
Check
upper
and
lower
tensions.
Use
first-class
thread
only.
During
bobbin
winding,
do
not
hold
thread
in
hand,
but
pass
it
through
thread
retainer
stud.
Thread
machine
properly
and check
both
tensions.
Remedy:
Push
needle
up
as
far
as
it
will
go,
its
flat
shank
side facing
toward
the
back.
Insert
system
130/705
H
needle.
Insert
new needle.
Check
threading.
Select
needle
according
to Needle
and
Thread
Chart.
See
par. 1
above.
Regulate
thread
tensions.
Use
only
good-quality
thread.
Insert
new
needle
and
push
it
up
as
far
as
it
will
go.
Insert
new
needle.
Note
Needle
and Thread
Chart.
Let
machine
feed
the
work
alone.
Only
guide
the
material
lightly.
When
inserting
the
bobbin
case,
press
against
it
until
t snaps
into
place.
6.
Machine
works
heavily
Thread
ends
in
hook
raceway.