Singer 645 - Stitch Width Control; Relating Stitch Length to Stitch Width

STITCH
WIDTH
CONTROL
This
control
controls
the
side
sewing
of
the
needle
for
various
width
of
stitches.
At
0,
the
straight
stitch
line
results
in
ordinary sewing.
Also,
the
widest
special stitch
patterns as
per
those
shown
on
the
stitch
pattern selector
are
made
with
this
control at
5.
The
narrow
special
stitch
patterns
including buttonhole
are
made
with
this
control
at
the
less
number,
and
with
this
control
at
0,
only
straight sewing
is
made regardless the
selection
of
stitch
patterns.
With the
control
at
any
other
point
than
‘O”,
ordinary
straight
stitch
varies to
zigzag
stitches. At
1,
the
needle
takes
a narrow
swing
resulting
in
narrow
column
of
stitching
and, at 5,
the
needle
takes
a
large
swing
resulting
in a
wide
column
of
stitches.
In
case of
twin needle
sewing,
this
control
should
be
set
in
the
range
of
red
.
7
bar
or
less
than
Number
3
otherwise
..
...
needle
hits
needle
plate
RELATING
STITCH
LENGTH
TO
STITCH
WIDTH
When
the
stitch
width
control
is
set
at
one
particular
width
(such as
5),
the
stitch
length
control
will
now
control
how
close
those
stitches
come
together.
At
length 0,
the
fabric
does
not
move,
resulting
in
a
bar
of stitches
formed one
on
top
of the
other,
as
is
used
in button
sewing.
At
red
bar
mark
or
near
0,
the
feed
pulls
the
fabric
through
slowly,
resulting in
a
dense
column
of stitches
called a
satin
stitch. At
length 5,
a
very
long
open
zigzag
results.
I
*.
[:1
Wo
1
2
L2)2
272’
.11,11.
1,11:1
vv
4
5
5
5
5
5
5
5
L
2)2)4’O:j’’i..2
3...4
.5
16