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2 -3. SHIELDING GAS CONNECTIONS
(Figure
2-4)
Determine the distance the
control/feeder
is
to
be
located
from the
shielding
gas
supply,
and
connect
a
hose from the
regulator-flowmeter
on
the gas
supply
to
the gas
fitting
on
the
rear
of
the
control/feeder.
This
connection
has
a
right-hand
thread.
The
shielding
gas
hose
which
comes
from the gun is
to
be
attached
to
the gas
connector
on
the front
panel
of the
control/feeder.
This
connector
has
a
right-hand
thread.
2 -4. WATER CONNECTIONS
(Optional) (Figure
3-1)
When
a
water-cooled gun
is
used,
connect
a
hose
from the
water
supply
to
the WATER
IN
fitting
on
the
rear
of
the
control/feeder.
This
fitting
has
a
left-hand thread. See
the
gun
Instruction
Martual for
gun
to
control/feeder
connec
tions. Route the
return
water
where desired.
connections. When the switch connected
across
this recep
tacle is
closed,
the
contactor
in the
welding
power
source
will
energize, shielding
gas will
flow,
and wire will
begin
to
feed.
2- 8. WELD
CABLE TERMINAL
A terminal is
provided
on
the base of the
control/feeder
to
serve
as a
junction
point
for
joining together
the weld cables
from
the
welding
power
source
and the gun.
IMPORTANT
Ensure that the weld
cable terminal
is
kept
clean
at
all
times. Also
ensure
that the
nut
on
this terminal is
secure.
If either
one
of
the above conditions is
not
met, erratic
weld
current may
result.
2-5.115
VOLTS AC CONNECTIONS
(Figures2-3&2-4)
2-9.
SPEEDCHANGEGEARS
Since the
con~ol/feeder
requires
115 volts
ac
to
function,
it
is
necessary
to
make
up
a
power
cable
(16/3
is
recom
mended)
of the
desired
length
with suitable
plugs
on
each
end
(plug
to
control/feeder supplied;
see
Figure
2-3).
After
attaching
the
plugs,
connect
the power cable
to
the
control/
feeder
(rear panel; insert,
and
rotate
clockwise),
and
connect
the
remaining
end
to
a
115 volts
ac,
60 Hertz
power
supply.
Figure
2-3. 115 Volts
AC
Plug
Installation
2-6. CONTACTOR
CONTROL CONNECTIONS
(Figure
2-4)
It is
necessary
to
make
up
a
contactor
control cable
(16/2
is
recommended)
of the desired
length
with suitable
plugs
on
each end
(plug
to
control/feeder
supplied).
After
attaching
the
plugs,
connect
the cable
to
the
control/feeder (rear panel;
insert,
and
rotate
clockwise),
and
connect
the
remaining
end
to
the
contactor
control connection
point
on
the
welding
power
source.
Optional
Coolant
Input
Fitting
TA-009
758-A
Figure
2-4. Rear Panel Connections
2-7. SWITCH CONTROL CONNECTIONS
(Figure
3-1)
A
two-pole,
twistlock
receptacle
is
provided
on
the front
panel
of
the
control/feeder
for
making
switch
control
By varying
the combinations of the
supplied
steel and
nylon
speed change
gears,
the minimum
to
maximum wire
feed
speed
range
of
the
control/feeder
can
be
attained.
The
control/feeder
is
shipped
with
the
30
tooth
nylon
gear
attached
to
the
motor
drive shaft and the 24
tooth
steel gear
attached
to
the drive
assembly thereby supplying
a
wire feed
speed
range
of from
50
to
500
ipm.
Table 2-1 shows the
various gear combinations
available,
and the wire feed
speed
ranges that these gear
combinations will
yield.
L~
~use
two
steel gears
together
~s
will
cause
weld
current
to
be present
on
the
motor
and control
assembly. Also,
two
nylon
gears should
not
be used
together
as
two
nylon
gears will
wear
rapidly.
Table 2-1. Gear Combinations For Various Wire Feed
Speed
Ranges
Motor Gear
No. of Teeth
Drive
Gear
No. of Teeth
Mm. Wire
Speed
Control
Setting
Max. Wire
Speed
Control
Setting
15 Steel
15 Steel
24 Steel
24
Nylon
30
Nylon
24
Nylon
30
Nylon
30
Nylon
24
Nylon
30
Nylon
24 Steel
24 Steel
15 Steel
15 Steel
20
ipm
24
1pm
35
ipm
45
ipm
50
ipm
70
ipm
90
ipm
225
ipm
280
ipm
370
1pm
450
ipm
550
1pm
745
ipm
900
1pm
To
change
the
speed
change
gears,
proceed
as
follows:
1.
Remove the
cover
which
is
over
the
speed change
gears.
2.
Loosen the
two
bolts which
secure
the drive
assembly
to
the
base,
and slide the drive
assembly
Out
(away
from the
motor).
IMPORTANT
The
control/feeder
uses
a
nylon
and
a
steel gear in the
drive train between the drive
motor
and the wire drive
rolls.
Proper
clearance between the
nylon
and steel
gear is
important.
The
proper
clearance is .007 inch.
This is
approximately
the
same
thickness
as
two
sheets
of standard
writing
paper.
The easiest
way
to
obtain
the proper
alignment
is
to
be
sure
that the
motor
is
fastened
securely
to
the base
plate.
Then insert
a
piece
of
.007
thick paper
(or
two
thicknesses of standard
writing paper)
between the
nylon
and steel gear, check
the
alignment
of the gears
(the
two
gears
must
be
running
in
a
straight
line),
and then
tighten
down the
drive
roll
assembly,
If this
proper
clearance is
not
maintained in the
gears,
they
may
wear
severely, bind,
cause
erratic wire
feed,
or
break.
Ground
Terminal
(Green
Hex-Head
Screw)
I
LIne
Terminals
(Gold
&
Sliver Round
Screws)
TA-056 179-10
Contactor
Control
Receptacle
Fuse Fl
115 Volts AC
Receptacle
Shielding
Gas
Input
Fitting
Page
2
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