Singer Centurion 121C - STITCH LENGTH ADJUSTMENTS; PREVENTING UNAUTHORIZED CHANGES IN STITCH LENGTH; ADJUSTABLE STITCH LENGTH STOP

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
STITCH
LENGTH
The
stitch
length
can
be
regulated
while
the
machine
is in
operation
To
obtain
the
desired
stitch
length
in
forward
feed,
turn
regulating
thumb
screw
on oil
pan
"in"
(coun-
terclockwise)
for
less
stitches
per
inch,
and
"out''
(clockwise)
for
more (Fig.
A)
To
adjust
the
stitch
length
for
reverse
feed, it is
necessary
that
the
reverse
stopping
block
be
properly
positioned
This
is
done
by
loosening
the
lock
screw
in the
stopping
block
and
sliding
the
slide
block
up
or
down
to the
desired
stitch
length
The
locking
screw
must
then
be
retightened
(Fig.
B)
Regulating
Thumb
Screw
--~'.
More
Less
FIG. A
Stitch
Length/
,,~'
0
1
~'t.-~
Regulating
Screw
IRB,,
i!tit•J
•I
FIG. B
FIG. C
PREVENTING
UNAUTHORIZED
CHANGES
IN
STITCH
LENGTH
To
prevent
unauthorized
changes
in
stitch
length
remove
the
retainer
plate
screw
and
take
out
the
retainer
plate
spacer.
Replace
and
tighten
the
retainer
plate
screw
(without
spacer)
which
will
lock
the
retainer
plate
against
the
stitch
regulating
gears
(Fig. C)
ADJUSTABLE
STITCH
LENGTH
STOP
An
adjustable
stitch
length
stop
is
provided
to
prevent
the
machine
from
making
stitches
longer
than
pre-determined
maximum.
To
adjust
the
stop,
set
the
machine
to
desired
stitch
length
as
previously
instructed
and
turn
stop
screw
until
it
bottoms
against
the
stitch
length
regulating
screw
Lock
stop
screw
in
place
with
stop
screw
nut
(Fig.
C)
Stitch
length
setting
should
NEVER
EXCEED
capacity
of
fittings
in use.
5