Tweco 350 4R Wirefeeder - Manual (Page 29)

4-5 Manual 0-5182
operation weldskill 250, 350
Operation
D. WIRE INCH SWITCH
Art # 0-10094
INCH
The Wire Inch Switch is used to feed the MIG wire through the MIG torch. When the push button switch
is pressed down, the electrode wire is fed through the Wirefeed system & MIG torch. No gas flows and
welding voltage is not present when the Wire Inch Switch is activated.
!
WARNING
Keep torch away from eyes and face.
E. GAS PURGE
Art # A-10095
GAS PURGE
The Gas Purge Switch is used to purge gas (or impurities such as air) out of the gas system. When the
push button switch is pressed, the shielding gas flows through the Wirefeed system & out of the MIG
torch nozzle. The Wirefeed motor does not operate and welding voltage is not present when the Gas Purge
Switch is activated.
F. BURNBACK
Art # A-10093
BURNBACK
Burnback time is used to adjust the amount of MIG wire protruding from the MIG torch contact tip (stick
out) after the completion of welding. Rotating the Burnback control in a clockwise direction increases the
Burnback time. Rotating the Burnback control in an anticlockwise direction reduces the Burnback time.