8
Snap-on Tools Corporation Kenosha, WI 53141-1410
OPERATION
DUTY CYCLE
CONTINUAL EXCEEDING OF THE DUTY
CYCLE OF THIS (OR ANY) WELDING
MACHINE CAN CAUSE DAMAGE.
The Duty Cycle of a welding power
source is a percentage of a ten (10)
minute time period. It is the
maximum amount of time the power
source can be operated at a given
output without sustaining possible
damage due to overheating. A 60%
Duty Cycle means the welding ma-
chine can be operated at its rated
amperage for six (6) minutes out of
ten. The machine must be allowed to
cool (machine ON, fan running, but
not welding) for the remaining four
(4) minutes. Operating the machine
at a higher output requires that the
duty cycle percentage be lowered.
The following operating instruc-
tions and detailed setup procedures
enable an operator without previous
experience to produce quality fu-
sion welds. It is recommended that
an operator without prior experi-
ence with this equipment, first
practice on scrap metal of the same
type and thickness as the material
to be welded.
OPERATING SEQUENCE
1. Make sure that the pieces of
metal to be welded are free of
grease, dirt, paint and scale.
Use a wire brush to remove paint
and scale. Paint must be com-
pletely removed to bare metal.
Grease and oil could burn and
cause a fire or safety hazard.
Failure to clean the metal prop-
erly will result in erratic and
porous welds.
2. Install the unit as directed in
the installation instructions
and make sure the ground clamp is
firmly attached to a cleaned
area on the workpiece to be
welded.
3. Open the shielding gas cylinder
valve. Press the torch trigger
and listen for gas flow.
The welding wire will feed
when the trigger is actu-
ated. Take care that the
wire is not directed to hit
yourself or anything that is
grounded to the ground wire
on the welder.
PROCESS SELECTION
The following controls are lo-
cated on the front of the machine.
CAUTION
FIGURE 11. FRONT PANEL
F.
TORCH
PANEL
MOUNT
G.
TORCH
SELECTOR
CABLE
H.
(+)POSITIVE
TERMINAL
I.
(-)NEGATIVE
TERMINAL
A.
WIRE
SPEED
B.
HEAT
(VOLTAGE)
CONTROL
C.
VOLTMETER
D.
CIRCUIT
BREAKER
E.
"ON"
INDICATOR
LIGHT
CAUTION
