6
MIG WELDING GUN OPERATION MANUAL
3.0 DUTY CYCLE SPECIFICATIONS
4.0 INSTALLATION
5.0 OPERATION
5.1 TRIGGER PULL ADJUSTMENT
Duty cycle is defined as the percentage of 10 minutes the torch can weld at a rated load without overheating. The
data below shows the duty cycle ratings for PowerBall® Air-Cooled MIG Guns with both pure CO2 and mixed gases.
PowerBall® 300 amp and 400 amp MIG Guns have been tested for reliable operation at 100% duty cycle for
both pure CO2 and mixed gases.
INSTALLATION TO WIRE FEEDER
1. Insert feeder adapter (or Euro-style adapter) and
control plug into wire feeder and secure tightly.
2. Attach power cable to power source and secure tightly.
3. Feed wire to the gun by hand and tighten feeder drive rolls.
GUN MODEL AND MAX WIRE SIZE
DUTY CYCLE RATINGS
400 amp Air-Cooled MIG Gun
Maximum wire size: 5/64” (2.0mm)
100% @ 400 amps with pure CO
2
shielding gas
100% @ 400 amps with 90/10 mixed Ar/CO
2
shielding gas
100% @ 400 amps with 75/25 mixed Ar/CO
2
shielding gas
300 amp Air-Cooled MIG Gun
Maximum wire size: 5/64” (2.0mm)
100% @ 300 amps with pure CO
2
shielding gas
100% @ 300 amps with 90/10 mixed Ar/CO
2
shielding gas
100% @ 300 amps with 75/25 mixed Ar/CO
2
shielding gas
Spring
Set Screw
Light, Medium &
Heavy Trigger Springs
Feeder Adapter
(design will vary)
Control
Plug
Power
Cable
PowerBall® MIG Guns feature an adjustable trigger pull with three tension springs for a light,
medium or heavy trigger pull. All guns ship with the medium pull spring pre-installed. To change
the trigger pull spring, use a 3mm Allen wrench to remove the set screw holding the spring in
place. Replace with desired spring and secure back in place with the set screw.
TRIGGER OPERATION
Pulling the gun trigger feeds energized wire and starts the flow of shielding gas. The trigger should only be pulled
when ready to strike an arc, when initially feeding wire to the gun or when adjusting wire stick-out. Keep hands and
other body parts away from the end of the gun when pulling the trigger to avoid injury from the welding wire.