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Necchi Automatic Supernova Ultra Mark 2 - 25. Zig-zag Sewing; 26. Zig-zag Embroidery

Necchi Automatic Supernova Ultra Mark 2
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48. AUTOMATIC
BUTTONHOLES
The
special cam-group
for
buttonholes
may
be
turned
in
respect
of
its
handle
in
two
different positions: one
for
buttonholes
on
heavy
fabrics
(marked
by
a
large
button-
hole)
and
the
other
for
button-
holes
on
light
fabrics
(marked
with
a
small
buttonhole).
To change
from
one
position
to
another:
G
Fig
. 67
-
Press
cam-group
as
shown
on
Fig. 67
and
bring
index
• G »
in
correspon-
dence
with
the
desired
buttonhole.
-
When
it
is
in
the
correct
position, a click
will
be
heard
and
the
cam
group
will
remain
fixed.
a)
TO
MAKE
BUTTONHOLE
Stop
the
automatic
mechanism (see para. 45)
and
set
machine
as
follows:
-
Lever
• B » (Fig.
1):
in
left
notch
.
-
Lever
• C »:
on
the
left.
- Knob « D » :
on
red
s
quare
mark
.
Ch
e
ck
correct
position
by
trying
out
on
a
piece
of fabric
similar
to
the
fabric
on
which
buttonhole
is
to
be
made.
- Needle:
for
light
fabr
ics:
no
.
70
(10);
fo
r
hea
vy fabrics no.
90
(14).
- Upper thread: mercerized
cotton
no. 40.
-
Lower
thread
: mercerized
cotton
no. 50.
- Tension:
for
light
fabrics,
on
5;
for
hea
vy fabrics tensions s
hould
be
tighter
.
- Presser foot:
use
transparent
foot provided
with
guide for
buttonhol
es;
regulate
position of guide
in
accordance
with
the
desired
length
of
button-
hole.
Now
proceed
as
follows:
-
Insert
cam-group
into
machine
(Fig. 68).
-
With
needle
in
its
highest
position,
bring
handle
in
position 1
(handle
completely
on
the
left) Fig.
68
.
-
Make
upper
bar
tack
with
3
or
4
stit
ches.
36
-
Move
handle
to position 2
and
make
first
row
of stitches;
stop
when
upper
bar
tack
is
in
contact
with
presser
foot guide.
-
Move
handle
to position 3;
machine
will
sew
in
reverse
with
straight
stitches.
Stop
when
needle
reaches
upper
bar
tack.
& -
Move
handle
to position 4
and
make
se-
Fig.
68
cond
row
of stitches;
stop
when
needle is
out
of fabric.
-
Move
handle
to position 5
and
make
lower
bar
tack
with
3
or
4 stitches;
buttonho
le is
then
completed.
-
Remove
work
and
knot
the
two
threads
together
on
the
underside
of
fabric.
-
Cut
fabric
between
the
two
rows
of stitches
with
NECC!Il
buttonhole
cutter
(Fig, 59).
b ) FLAT-STITCHED BUTTONHOLES
Proceed
as
described
in
preceding
paragraph
with
the
following exceptions:
- Upper
tension:
set
on
4,
thread
no. 50.
-
Lower
tension:
normal,
thread
no. 50.
49
. AUTOMATIC BLINDSTITCHING
Proceed
as
described
in
para.
41
but
wi
th
the
following
machine
setting:
- Cam group: no. V.
-
Knob
"A»
(Fig.
1):
on
1.
-
Lever
« B » :
in
left
notch.
-
Lever
" C » :
on
the
left.
-
Knob
«D»:
on
2.
Fig.
69
NOTE
:
If
the
seam
appears
on
the
inner
side
of folded
fabric
also,
adjust
the
position of guide
by
means
of scr
ew
" F » (Fig.
69).
37

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