Tweco Hefty II CC CV Voltage Sensing Wire feeder - Manual (Page 26)

OPERATION
Prewelding Procedure:
Follow all installation instructions for the welding
power source, the welding gun, and the HEFTY
ΙΙ
STAINLESS wire feeder before attempting to
weld.
1. Make sure all necessary connections have
been made (Refer to “Connections” in the Installa-
tion chapter of this manual).
2. Turn ON the power source and the wire feeder.
3. Set the CC/CV mode switch on the wire feeder
to the proper position (See CC/CV Mode Switch in
the Internal Controls And Connections section of
this manual).
4. If shielding gas will be used, depress the purge
switch or gun switch and adjust the flow of gas.
WARNING: If the gun switch is
depressed, the wire feeder will
feed electrically “hot” welding
wire. If this “hot” welding wire
touches the work piece, a weld-
ing arc will be established.
5. Depress the inch switch or gun switch and
adjust the wire feed speed to the desired value by
means of the wire feed speed control. The wire feed
speed control can be adjusted during setup or while
welding.
WARNING: If the gun switch is
depressed, the wire feeder will
feed electrically “hot” welding
wire. If this “hot” welding wire
touches the work piece, a weld-
ing arc will be established.
6. Adjust the voltage control (on a CV machine)
or current control (on a CC machine) to the desired
value. The voltage or current control can be ad-
justed during setup or while welding.
7. If using a CV power source, the output contac-
tor on the power source will have to be energized.
In most cases, this will require a jumper to be added
to the power source or a switch on the power source
to be turned on. Read the power source owner’s
manual for proper connections or settings required.
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Gun Switch
Gas Valve
Wire Feed
Power Source
Figure 5-1 Functional Timing Diagram
430429-456
OPERATION
November 17, 1999 5-1