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V.
NEEDLE SELECTOR MECHANISM (MECHANICAL PART}
Set
the
change
knobto
position
"KC(ll)",
and move
the
K carriage
across
and back
slowly and/or
quickly to
check
the
needle
selector mechanism.
After
moving
the
K carriage
to
the other
side
of
the
machine,
all the
needles
should
be selected
to
position
D.
1. lf
some needles
do not
come
outto
position
D
at
random.
1-1. Needle
is
bent.
Replace
the
needle
with
a
new
one.
1-2.
The timing
belt
and the rotary
encoder assembly,
the rotary
encoder
assembly and
the rotary
cam
are
not
in the
right
relative
position.
Adjust
and
re-mount them in the
right
relative
position.
(See
"Replacing the
timing
belt
and
the rotary
encoder assembly").
1-3.
The card
reader guide
stopper
is
not mounted correctly,
and
the position
of
the rotary
cam and
the rotary
cam lever
are
not
correct.
Adjust the position
of
them.
2.
lf
some
needles
do not
come
out
to
position
D but
are
selected
in
eighth or
sixteenth
cycle.
2-1
.The
rotary
cam
lever
and
the
needle
selector
plate
(N.S.P.)
operation
lever
are
not
in the
right
relative position.
(Be sure
to
place
the
N.S.P.
operation lever
is
on
the
left
side
of
the rotary
cam
lever.)
2-2. Squeezed between
the rotary
cam
lever
and
the rotary
cam
lever
guide, the
rotary
cam
lever does
not
move
smoothly. (Fig.
12),
2-3. Squeezed
between
the
armature and solenoid
yoke of
the
needle selector
solenoid,
the
armature
does
not
move
smoothly.
Put
the
specified
grease
on
the
armature sliding parts
of
the
solenoid yoke.
2-4.Ihe
spring
for
the armature
is
broken.
Replace
the
spring
with
a
new
one.
K carriage
movement
is
too
heavy.
3-1. When
the
K carriage
does
not
move.
The
rotary
cam lever
does
not
move
correctly.
After
making sure
that the rotary
cam
lever
is
not
bent, adjust
the
card
reader
guide stopper and
the rotary
cam
position.
3-2.
When
the
K carriage
is
hard
to
push.
The
clearance
between
the rotary
cam and
the
rotary
cam
adjuster collar
is
too
wide.
Adjust the rotary
cam
position.
Adjustment.
4-1.
Adjustment
of
the
rotary
cam lever
guide.
1.
Remove
the
pattern card
from
the card inlet
and
the
needle
selectorpanel
assembly.
2.
Plug
the
power supply
cord
into
the AC
inlet
and
the other
side
of it
into
the
wall outlet.
3. Turn on the
power switch,
set
the
pattern selector
to
the lower
position
and push CF key.
4.
Bring
back
all the
needles
to
position
A.
5.
Place
the K
carriage outside
of the left turn
mark
"l
C "
and
set
the
change
knob
to
position
"KC(l)"
or
"KC(ll)".
6.
Move
the
K
carriage
across
and
back
until
all the
needle
selector solenoids
are
turned
on and
the mark
sensor
is
on the
left
side.
3.
4.
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At
ffi
s
a't
solenoid yoke
armature
rotary
cam
spring
for
the armature
rotary
cam lever
guide
specified
grease
rotary
cam
lever
Fig.12
-8-
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