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lf
the
indicator
shows
the
following
voltage
for
each
pin,
there is
no
defect
on
them.
P6No.6pin.
..+5Vt5%
P6No.7pin.
...0V
P6No.8pin.
...+5V15%
lf
the
indicator
does
not
show
the
above voltage
for
the
three
pins,
replace
the
pattern
case
whole
unit
or
the main
P.C.B. assembly
with
a
new
one.
5).
lf
there
is
no
defect
after
checking
the item
3-3,
replace
the
power
supply
board
with
a
new
one.
4.
The pattern
card
is
not fed correctly.
The pattern card is
moved
foward
and
backward by the
sprocket wheel
which
is
connected
to
the
card feeding shaft.
The
card
feeding
shaft
is
moved
by the
gear
260 which
is
engaged
with
the
stepping
motor.
The
stepping
motor is worked
by
+12VDC REG.
power supply
and
it
is
controlled by the
signal
from
the
computor
which
is
passed
through the driving
circuit
of the main
P.C.B.
4-1. Checking
the
card feeding mechanism.
When
turning on the
power switch, the
card feeding
dial
does
not
move
the
card feeding
shaft
because
it
has
an
overload
clutch
mechanism.
Turn
off the
power switch
and feed
the
pattern card
by turning the
card
feeding
dial.
lf
the
card feeding
dial
ratchets
there
are some
defects on the
card feeding
mechanism.
The encoder cords
are
fouling the
card feeding
dial or the
gear
260.
The
gear
for
the
stepping
motor
and
the
gear
2,6O are engaged
too
tight.
(Fis.
50)
qt
9A
qt
9A
fG
qG
90
AA
fit
,a
AA
9r1
8i
ta
ta
4A
*t
a
.G
IG
aa
*t
4A
AA
ta
ta
la
ffi
ca
,x!
,a
qa
tfi
cat
m
,a
,a
t{!
,a
AE
t{t
a
ca
t1
AA
A't
4(t
ta
ta
4A
9A
a
ca
{t
A1
A:t
t{!
<xt
ta
ta
ta
8A
aa
m
ta
4A
ca
Adjust the
engagement
of
both
gears
by
moving
the
gear
260
to
right
and
left.
Take
the
smallest
play
between
both
of
them
and
the
card feeding
shaft
must move
smoothly.
Note: After
taking
off
the
stepping
motor
or
loosening
the
screw
of
the
gear
Z60,
adjust
the position of the pattern
card and
the mark
sensor
by
referring
to
item
7.
4-2.fhe
stepping
motor
does
not
move.
The coils
of
the
stepping
motor
are connected
to
the connector 54
as
show
in the figure. (Fig.
51)
Set
the
tester
to
the
O
x
1
range
and check
the
resistance
of
each
coils
as
following
condition.
Fig.51
S11
No.
'l
pin
-
54 No. 3
pin/No.
5
pin.
S1
1
No.
2
pin
-
54 No. 2 pin/No. 4
pin.
The indicator
of
the
tester
shows
50O
-
70O.
lf
the
stepping
motor
is
working correctly,
there
are some
defects on the
control circuit.
Replace
the
pattern
case
whole
unit
or the main
P.C.B.
assembly
with
a
new
one.
5.
When
pushing
the CF key,
and
after mark
sensor reads
the
card
twice,
the
number
2
of the
L
window
comes
to
the
inlet
instead
of
the number
1.
Push
the
RR
key, the pattern
card
is
fed
back
to
the
set line.
Make
sure
that
the pattern card
is
set
the card inlet
correctly.
(Fig.
52)
Fig.
50
-29
-
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