Stop - Miller Electric AUTOMATIC 1D Owner's Manual

~j~V1PORTANT
For in formation
on
the wire drive and
spool
support
assemblies,
see
Owners Manual 1538.
5.
Connect
remaining lead
to
terminal A
on
terminal
strip 2T.
3 -4. REMOTE START AND STOP CONNEC
TIONS
6.
Place the SPOT-CONTINUOUS switch in the
SPOT position.
I~tVARNlNG:
ELECTRIC SHOCK
can
kill.
Do
not
touch live electrical
parts.
Shut down the weld control and disconnect
input
power
(115 vac) before
making
any
terminal
strip
connections.
For
remote
control of starting
and
stopping,
connec
tions
must
be made
to
terminal strips iT and 2T in the
weld control. Loosen
screw
from door
on upper
panel
of the weld control and open door. Terminal strips 1 T
and 2T
are
located
on
the
right
side of the control.
A. Momentary-Contact Push-Button Switch
1. Route cord from switch(es) through strain relief
clamp
on
right side of weld control (see Figure
3-4).
2. Remove jumper link between
terminals G and F
on
terminal strip iT.
3. Connect the
two
leads from the normally-open
start
switch
to
terminals F and H
on
1 T.
4. Connect the
two
leads from the normally-closed
stop
switch
to
terminals G and F
on
iT.
B. Maintained-Contact (Relay) Switch
1. Route cord from
relay through
strain relief
clamp
on
right
side of weld control (see
Figure
3-4).
2. Remove
jumper
link between terminals F and E
on
terminal strip iT.
7. Closing the switch will
start
weld
cycle
and unit
will weld for the time
set
on
the SPOT TIME
con
trol. The
setting
of the pre-flow and post-flow
timers determines how
long
weld
current
is
not
present
and thereby determines the skip time.
The unit will automatically recycle through the
weld cycle until the switch is opened.
After all connections
are
secured,
close door
on upper
panel
of weld control and
tighten
screw.
(
To Terminal A
_________
On 2T
To Weld
J
To Terminal E
Control
On
iT
I
To Terminal F
is,.
OniT
Figure
3-2.
Skip Welding
Switch Connections
3
-
5. NORMALLY-OPEN AND NORMALLY-
CLOSED CONTACTS AVAILABLE FOR CONTROL
OF WELD
FIXTURES (Figure
3-3)
-
A
set
of
normally-open and normally-closed
contacts
are
provid
ed
to
work in
conjunction
with each weld
cycle timing
circuit. These
contacts
may
be used
to
determine fix
ture movement
in conjunction with the weld cycle. For
example: If the
operator
wants
the fixture
to start
mov
ing
at
arc
initiation and
stop
when the STOP push but
ton
is depressed, the normally-open
contacts
of CR51
(at receptacle RC4, terminals F and H) would be used
to
control fixture
movement.
3. Connect the normally-open maintained
contact
of the relay
to
terminals F and H
on
1 T.
4.
Closing relay
contact
will
start
unit and opening
relay
contact
will
stop
unit.
C. Skip Welding (Figure 3-2)
1. Route
a
3-conductor
cord from
a
single-pole,
double-throw switch
through strain relief clamp
on
right side of weld control (see
Figure 3-4).
2. Remove jumper link between terminals F and E
on
terminal strip iT.
3. The switch
commons
of the single-pole, double-
throw switch should be tied
together
to
one
lead
of the 3-conductor cord. Connect this lead of the
3-conductor cord
to
terminal F
on
terminal strip
1 T.
4. Connect
one
of the
two
remaining leads
to ter
minal E
on
terminal
strip
iT.
WARNING: ELECTRIC SHOCK
can
kill.
Do
not
touch live electrical
parts.
Shut down the weld
control and disconnect input
power
(115 vac) before making any internal
con
nections.
Connections
can
be made
to
the 3/16
male friction
connectors
on
receptacles RC4 and RC1O located
behind the
timing circuit card assembly in the weld
con
trol. To gain
access
to
these
receptacles,
the
timing
cir
cuit card assembly may be removed
as
follows:
1. Loosen
screw
from door
on upper
panel of the
weld control and open door.
2. Remove three
screws
securing timer panel.
3. Gently pull timer
panel
part
way
out.
4. Remove
plugs
PLG1 and PLG2 from the
printed
circuit card assembly.
5. Remove timer
panel.
Single-Pole,
Double-Throw Switch
TA-044 484-A
OM-1 536 Page 7