Tweco VAF4 Transmig - Manual (Page 61)

TRANSMIG VAF4
Manual 0-5231 3-43 INSTALLATION, OPERATION AND SETUP
3.27 Welding- 4T Operation
Welding- 4T Operation (Crater=ON)
Position the welding gun above the workpiece, depress the gun switch trigger, it enables power source and gas
valve, and the wire will begin feeding. Welding arc is established. Release the gun switch trigger and the welding
process continues. To end the weld, depress the gun switch trigger again and the welding voltage and welding cur-
rent turn to preset crater voltage and crater current. Release the gun switch trigger and the welding process ends.
NOTE
In 4T welding (Crater=ON), the user can independently control the amount of crater-filler time by ad-
justing the amount of time the gun switch is depressed.
Burnback Postflow
Gun Trigger
Arc Established
Gas
Contactor
Wire feed
Pr
efl
ow
Run In
%
Ramp
Crater WFS %
Art # A-11259
Crater Volts %
Voltage
Figure 3-41 Welding- 4T Operation (Crater=ON)
Welding- 4T Operation (Crater=OFF)
Position the welding gun above the workpiece, depress the gun switch trigger, it enables power source and gas
valve, and the wire will begin feeding. Welding arc is established. Release the gun switch trigger and the welding
process continues. To end the weld, depress the gun switch trigger again.
Pr
efl
ow
Ru
n In
%
Ramp
Gun Trigger
Arc Established
Gas
Contactor
Wire feed
Burnback Postflow
Art # A-11263_AB
Figure 3-42 Welding- 4T Operation (Crater=OFF)