Operation Manual

needle and
bobbin threads
interlock
in
the
center
of
the material.
The
bobbin
thread tension
is regulated
by
turning the
smaii knurled
screw
on the
bob
bin case.
Turn
this screw
right
(with
your
thumo
nail)
for
a
tighter
tension,
or left for
a
looser
ten
sion.
If
the
same
size threads
are
used
in the
needle
and
on
tne
bobbin,
there
is no
need
to adjust
the
bobbin
thread
tension.
This
tension
is
set
correctly
if
a
slight
re
sistance
has
to be
overcome
when
pulling
the thread.
Numbers
0 to
10 indicate
different
degrees
of tension
on
the
upper
tension
dial.
The
higher
the number,
the
tighter
the tension.
For
ordinary
sewing
operations.
the
upper
tension
should
be set at
about
5.
Please
note:
Ease
both tensions
somewhat
for
sewing
synthetic
fabrics.
16
The
accessory
box
which belongs
to your
machine
contairs
several
sewing
feet
for
special
sewing
Dperations.
To
change
the
sewing foot,
bring
the
needle
to its
highest
point
and
raise
the
foot. Turn
screw
(16)
until
the
sewing
foot
can ce
re
moved,
tilting
it
sideways
(see
Figs. 1
&
2).
The
new
foot
is
attached
in
the
reverse
order.
For
sewing
elastic
fabrics,
attach
ordinary
sewing
foot
No,
93-838 954-00
rather
than
clear-’iiew
sewing
foot
No. 93-100
179-00.
Uoper
tension
too
tight or
lower tension
too
loose.
To
change
the
needle,
bring
the needle
bar
to
its
highest
point
and lower
the
sewing
foot,
Loosen
needle
set screw
(22)
and pull
the
old needle
out
of the
needle
clamp.
Insert
new
needle
and
push it
up as
far
as
it
will
go
(Fig.
3),
making
sure
that the
flat
side of
its
shank faces
:oward
the
back.
Tighten
screw
(22) securely.
bottom
top
bottom
top
.Jpper
tension
too loose
or lower
tension
too
tight.
top
Both
tensions
correctly
balanced.
1
3
2
Use
System
130
R needles
only.