Tweco VAF4 Transmig - Manual (Page 62)

TRANSMIG VAF4
INSTALLATION, OPERATION AND SETUP 3-44 Manual 0-5231
3.28 Stitch Operation
After selecting stitch operation in advanced features menu, select 2T Stitch or 4T Stitch by pressing 2T/ 4T button
on front panel.
2T Stitch Operation
Position the welding gun above the workpiece and depress the gun switch trigger. Depressing the gun switch trig-
ger enables the gas valve. When preflow ends, wire feed motor and power source are enabled the welding process
begins. When Stitch Time is over, arc extinguishes and it will stop feeding. When Dwell Time is over, the welding
gun will starting welding again. This process repeats until releasing the gun switch trigger.
Preflow Run In
%
Postflow
Gun Trigger
Arc Established
Gas
Contactor
Wire feed
StitchTime
Dwell time
Ramp
Bu
rnba
ck
Burnback
Art # A-11272_AB
Figure 3-43 Welding- 2T Stitch Operation
4T Stitch Operation (Crater=ON)
Position the welding gun above the workpiece and depress the gun switch trigger. Depressing the gun switch
trigger enables the gas valve. When preflow ends, wire feed motor and power source are enabled the welding
process begins. Release the gun switch trigger and the welding process continues. To end the welding, depress
the gun switch trigger again and welding current and welding voltage will turn to preset crater voltage and crater
current. Release the gun switch trigger and the welding process ends.
Pr
efl
ow
Run In
%
Postflow
Gun Trigger
Arc Established
Gas
Contactor
Wire feed
StitchTime
Dwell time
Ramp
Bu
rn
ba
ck
Burnb
ac
k
Burnb
ac
k
Crater WFS
%
Voltage
Crater Volts %
Art # A-11273_AB
Figure 3-44 Welding- 4T Stitch Operation (Crater=ON)
4T Stitch Operation (Crater=OFF)
Position the welding gun above the workpiece and depress the gun switch trigger. Depressing the gun switch
trigger enables the gas valve. When preflow ends, wire feed motor and power source are enabled the welding
process begins. When Stitch Time is over, arc extinguishes and it will stop feeding. When Dwell Time is over, the
welding gun will starting welding again.