Tweco VA 2000 Ultra-Feed - Manual (Page 34)

ULTRAFEED VA 2000
4-8 February 27, 2006
4.07 Welding - 2 Step Operation
Refer to Figure 4-4.
Position the welding gun above the workpiece and depress the gun switch trigger. Depressing the gun switch
trigger enables the gas valve, wire feed motor, and power source; the welding process begins. To end the weld,
release the gun switch trigger which disables the gas valve, wire feed motor, and power source.
NOTE
When the gun switch is released, gas will continue to flow for approximately 0.5 seconds. This is a feature
of the system and is normal.
Gun Trigger
Arc Established
Gas
Contactor
WireFeed
Runin %
Postflow Preflow
Ramp Rate
Art # A-06986
Figure 4-4: Welding - 2 Step Operation