Husqvarna Zig Zag - Under thread tension adjustment; Upper thread threading and tension; Threading the upper thread

..........".-
Tension of
under thread.
Threadling
and tension of
upper thread.
pressing
the button
as shown in
Fig.
10.
The bobbin
lies
inside
the case,
which is
pushed
on
to
the
pin
in the shuttle"
The
flap
on the bobbin
case can
be
opened with a
grip
as
shown
in
Fig.
tr7,
and the bobbin case
with bobbin
can rhen
be removed.
Tension
of
under
thread"
The
tension
of the
under thread can be regulated by rneaRs
of
the
tension spring
on the outside
of the bobbin case. If
the
tension is
to be altered,
this
is done
with the a.id
of
the
little screw driver,
to
turn
the
screw
of the
spring.
The
tension
of the
thread
is
tightened when
the
screw
is
turned
to the
right
and
loosened
when
the
screw'
is
turned
to the
treft"
Usually
llq
to
llz
rurn
is
sufficient
to
effect nhe
alteration.
On delivery,
the
under
thread
is adjusted
for
normal
ten-
sion, which
only needs
ro be
changed
if very
thin or
espe-
cially thick
materials
are ro be
used" If
frequent
changes
are
.made
f',rom
sewing
thread
ro dar.ning
thread,
it mayj be
'ad-
visable to procure
an extrd bobbin
case, so
that
each case
can
be
kept
at its parricular
tension.
Threading
and
tension of upper
rhread.
Vhen
threading
the
upper thread,
the take-up
lever
.sh,,rrl,l
bein
its
highest
position (1,
FiS.
13). The
thread is
gtri.l,.,l
d
Threading
and
tension
of
upper
thread"
f'rom
the reel
through
thread-guides
2
and 3,
down between
the tension
discs 4,
over the regulating
spring 5,
under
the
thread-guide
6,
then
upwards to the
take-up
lever 1, through
which
the
thread
is
passed
from
right
ro lef t, downwards
through
thread-guide
7
and
into thread-guide
8 on
the
needle bar,
after
which it is passed
through
the
eye of
the
needle from
front
to
back
and
pulled
our
a
finger
lengrh.
FiS.
1,2.
Fig.