10.
How
to
handle
the
control
box
and
cautions
1) Wiring to the power source voltage and transformer
® Kinds of transformers and methods of connection
The
side
of the
transformer
on the
power
source
side
is
called
the
primary
side
and
according
to the voltage used, four kinds of transformers, A, B, C and D are available.
A lOOV, 115V
B
200V,
220V,
240V
C
380V,
415V
D
220V,
380V
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AOOJ
AO AMI
TRANSFOHUER FOR ATT
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Be
sure to connect the two electrical source
leading
wires
to the
"0"
Vof
primary
sideand to
the terminals ® whichare of same
voltage
with the power
source.
(D Percentage of voltage variance
The limit of voltage variance is ±10%. This control box is so constructed that even if the
voltage
is
varied
to the limit of
10%,
it
will
function
normally.
When
the
voltage
goes
below
the
10%
limit,
the
timing
of the
magnet
also
changes,
causing
malfunctioning
of the
safety
device.
However,
when
the
voltage
gets too
high,
the life of diode, condenser,
I.C.
etc.
will
be shortened
and sometimes the sensitive parts may be ruined, so be very careful.
2) Besure to use fuses of 6A, 1A (Small) Amperes.
Even
if the size of the
glass
tube is
same,
the running current may not be
same.
So be sureto
use
only
the
fuses
marked
as
above.
In
case
the
diode
should
break
(in
this
case
the
current
will
run
to
any
direction),
orthe
wiring
is
wrong
or if the
circuit
should
be
short-circuited,
if the
fuse
of
6A
is
used,
other
electrical
parts
will
not be
damaged.
If
over-sized
fuse
is
used,
the
damage
will
be
felt
by other
parts
also
and the
repairing will be a tremendous job. -
dL
dl
3) Correct connection of the ground wire (green)
There
should
be a
ground
terminal
on the
power
sourcesocket(for
3-phase,
4
plugs
can be
inserted),
so be
sure
to
connect
this
green
ground
wire
to the 4
cords
for the motor, the
electrical
equipment box and needle positioning synchronizer, correctly.
4) Do
not
damage
the
cords
When
the 6-core cord comingout from the
needle
positioningsynchronizer on the sideof the
hand
wheel
is
touching
the
bobbin
thread
during
the
bobbin
thread
winding,
the
vinyl
covering
might
be
torn
and
might
be
short-circuited
with
the
neighboring
electric
wire.
It it
touches
the
belt,
the
same
contingency
might result.
If
any
other
cords
are
contacting
any
of
the
moving
parts,
there
is
always
the
danger
of
tearing
these
parts, so be sure to tie the
cords
firmly
to the table or its
legs.
5)
When
pulling
out
the
plug
of the
electric
equipment
box,
do not
pull
the
cord
strongly.
This
plug
is so
made
to be
pulled
out
easily.
If you
pull
the
cord
too
strongly,
the
copper
wire
and the
tip
of
the
pin
terminal
might
come
off.
6)
The
spare
6A
fuse
is
attached
to the
control
box
with
a
red
vinyl
tape.
In
either
case,
when
the
fuse
is
blown
out,
exchange
it just
once.
If it
blows
up
again
after
replacing,
there
may
be
some
trouble
somewhere,
so inspect
the
source
of
the
trouble.
9 -
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