TO
SET
NEEDLE
BAR
AT
CORRECT
HEIGHT
PREPARATION:
Remove face plate, slide plate and throat
plate. See that needle is correctly set in
needle
bar.
On drop feed varieties, lower end
of
bushing A, Fig. 2, must be set as shown in
Fig, 2. To reset bushing, loosen screw B.
On compound feed varieties, this dimen
sion is automatically obtained when needle
bar
frame
is
assembled.
CHECK:
When needle bar is at its lowest point
(during rotation
of
machine pulley), UPPER
TIMING
MARK
on
needle
bar
should
be
level
with
lower
end
of
bushing.
Check timing
of
hook as instructed on
page 5.
Fig. 2
TIMING
MARK
58.73mm
-
591D200A,
591C200A
66.01mm
-
591D300A,
591C300A
THROAT
PLATE
SEAT
SETTING:
Loosen
clamping
screw
C,
Fig.
2.
Raise
or
lower
needle
bar
so
that
UPPER
TIMING
MARK
is
level
with
lower
end of
bushing.
Then
securely
tighten
screw
C.
Replace
throat plateand slideplate.
When
replacing
the
face
plate,
make
certain
that
the
screw
holes
in
the
face
plate
gasket
are
aligned
with
the
re
spective
screw
holes
in
the
face
plate;
avoiding
injury
to
the
gasket
and
consequent
oil
leakage.
TO
SET
CHECK
SPRING
HEIGHT
PREPARATION:
Threadthe
machine
and
place
a
lightweight
material
under
presser
foot.
CHECK:
Turn
machine
pulley
over
toward
operator
slowly.
When
take-up
lever
begins
to
rise,
check
spring
D,
Fig.
3
makes
a
slight
dip
and
a
return
to
its
higher
position.
Later,
as
take-up
lever
approaches
top
of
stroke,
check
spring
Dshouldbe
drawn
allthe waydown;settingthe stitch.As
lever
descends,
checkspringD returnsto rest.
-2
To Next Page
Loading...
