13
PROCESS SELECTION
The following controls are lo-
cated on the front of the MM350XL.
(continued on following page)
A.
CONTROL
RECEP-
TACLE
(INPUT)
B.
STORAGE
COMPART-
MENT
C.
MIG/TIG
VOLTAGE
SWITCH
D.
VOLT-
METER
E.
CIRCUIT
BREAKER
F.
"ON"
INDICATOR
LIGHT
FIGURE 16. FRONT PANEL
A. CONTROL RECEPTACLE (INPUT)
Input receptacle for wire feed
voltage, trigger circuit and
wire speed control from welding
machine.
B. STORAGE COMPARTMENT
Compartment for tools and the
350LPK parts kit.
C. MIG/TIG VOLTAGE SWITCH
Twelve position switch provides
"4" TIG (requires optional FLEX
TIG) and "8" MIG voltage set-
tings.
D. VOLTMETER
Indicates open circuit voltage
when torch trigger switch is
activated and arc (welding)
voltage during welding.
E. CIRCUIT BREAKER
Primary power switch and over-
load protection device.
F. "ON" INDICATOR LIGHT
Illuminates when the circuit
breaker on the machine is "ON".
G. GAS TERMINAL
Single terminal connection for
gas from welding machine.
H. OCV/GAS PURGE
Operates the gas solenoid to
purge the lines of impurities
prior to welding. Pressing the
switch also causes open circuit
voltage to be registered on the
power source voltmeter.
CAUTION
Torch is electrically HOT
when switch is actuated.
I. WIRE SPEED
Potentiometer controls speed of
wire drive motor to give wire
speed of 50 to 800 inches per
minute.
J. TORCH PANEL MOUNT
Combination current output,
contactor switch connection,
gas supply connection, and wire
feed output in a single unit.
K. CONTROL RECEPTACLE (OUTPUT)
Output receptacle for wire feed
voltage, trigger circuit and
wire speed control out to the
remote feed unit.
L. (+)POSITIVE TERMINAL
Positive output terminal from
the welder DC power source. The
Power plug is inserted into this
terminal for standard welding
operation. The work cable can be
plugged into this terminal for
straight polarity welding on
very light sheet metal, or for
using flux cored gasless wire.
G.
GAS
TERMINAL
H.
OCV/GAS
PURGE
I.
WIRE
SPEED
J.
TORCH
PANEL
MOUNT
K.
CONTROL
RECEPTACLE
(OUTPUT)
L.
(+)POSITIVE
TERMINAL
M.
(-)NEGATIVE
TERMINAL