Tweco ULTRAFEED VAF-4, Руководство по обслуживанию

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ULTRAFEED VAF-4
Manual 0-5332 OPERATION 4-35
4.21 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 current 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 adjusting
the amount of time the gun switch is depressed.
Burnback
Postflo
w
Gun Trigger
Arc Established
Gas
Contactor
Wire feed
Pr
efl
ow
Run In
%
Ramp
Crater WFS %
Voltage
Crater Volts %
Art # A-11259_AB
Figure 4-28 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_AC
Figure 4-29 Welding- 4T Operation (Crater=OFF)