Husqvarna Viking Automatic 21 - Centring needle in throat plate hole; Setting centre position for zig-zagging; Tangential adjustment of sewing hook

4
.
Centring
needle
in
throat
plate
hole
Set
the
needle
swing
control
for
maximum
stitch
width
.
Turn
eccentric
(
1
Fig
.
3
)
on
the
needle
-
bar
frame
(
3
Fig
.
3
)
,
which
serves
as
bearing
for
link
(
4
Fig
.
3
)
from
the
zig
-
zag
drive
,
until the
needle
swings
in
the
throat
plate
hole
with
equal
clearance
on
both
sides
when
the
hand
-
wheel
is
turned
.
Loosen
set
screw
(
2
Fig
.
3
)
before
making
the
settling
,
and
tighten
it
afterwards
.
Setting
centre
position
for
zig
-
zagging
Set
the
starting
-
position
control
at
the
centre
position
and
the
needle
swing
control
at
0
.
Loosen
screw
(
1
Fig
.
4
)
,
and make
the
setting
by
pressing
or
easing
follower
(
2
Fig
.
4
)
until
the
needle
is
centred
in
the
throat
plate
hole
.
5
.
Tangential
adjustment
of
sewing
hook
Set
the machine
for
straight stitching
in
the
right
-
hand
starting
position
,
and
for
a
zig
-
zag
stitch
5
/
u
in
.
(
2
mm
)
wide
.
Use
the
handwheel
to
bring
the needle about
s
/
64
in
(
2
mm
)
above the lower
end
of
the
stroke
on
the
way
up
.
Loosen
the
bevel
gear
(
1
Fig
.
6
)
on
the
lower
camshaft
and
screw
it
fast
again
in
such
a
position
that
the
tip
(
1
Fig
.
5
)
of
the
sewing
hook
comes
in
line
with
the
centreline
of
the
needle
(
2
Fig
.
5
)
.
The
arm
sleeve
must
be removed
for
this
setting
.
6
.
3