Singer 251-2 - Timing the Feed Mechanism

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
24
TO
TIME
THE
FEED
_,---
-..:-~--?"'---rt
_,
z
Fig. 41. Timing the Feed
Before
the
machine
leaves
the
factory,
the
feed
lifting
eccentric-and-bevel-gear
and
the
feed
eccentric
are
both
set
for
average
sewing
conditions;
having
the
timing
screw
in
each
eccentric
enter
groove
provided
for
it in
the
arm
shaft.
As
the
grooves
in
the
arm
shaft
ore
not
visible
to
the
adjuster,
the
machine
pulley
should
be
turned
over
toward
operator
until
feed
lifting
eccentric
connecting
rod
A2,
Fig.
41
is
at
its
lowest
position.
Timing
screw
Y,
Fig.
41
will
then
be
on
top
of
feed
lifting
eccentri:-and-
bevel-gear.
Loosen
timing
screw
Y
and
set
screw
0
and,
while
maintaining
this
position
of
the
gear,
turn
arm
shaft
until
timing
screw,
as
it
is
slowly
tightened,
can
be
felt
to
drop
into
its
groove
in
arm
shaft.
Se-
curely
tighten
timing
screw
Y
and
set
screw
0.
Feed
eccentric
timing
screw
Z,
Fig.
41
appears
im-
mediately
after
large
stop
screw
W,
Fig.
41,
wh::n
feed
eccentric
is
rotated
over
toward
operator.
Feed
eccentric
should
be
set
for
average
sewing
conditions,
by
having
this
timing
screw
Z
exactly
in
line
with
timing
screw
Y,
as
shown
in
Fig.
41.
Thus,
as
timing
screw
Z
is
tightened
it
will
drop
into
its
groove
in
arm
shaft
which
is
in
line
with
groove
pro-
vided
for
feed
lifting
eccentric-and-bevel-gear
timing
screw
Y.
Securely
tighten
timing
screw
Z
and
the
two
set
screws
in
feed
eccentric.
If
for
any
reason,
it is
necessary
to
alter
the
timing
of
either
eccentric,
timing
screw
should
be
removed
and
eccentric
locked
in
desired
setting
by
means
of
set
screws
only.
NOTE:
Whenever
the
timing
of
the
feed
is
changed,
sewing
hook
should
be
checked
for
necessary
adjust-
ment
also,
as
instructed
on
page
21.