Tweco SP 2001 Spool Gun - Manual (Page 17)

OPERATION
Prewelding Procedure:
Follow all installation instructions for the control
box and welding power source before attempting to
operate the SP-2001 Spool Gun Assembly.
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.
3. Depress the gun switch trigger and adjust the
flow of shielding gas.
4. Remove the gun cover, spool cover, nozzle
assembly, and contact tip. Disengage the drive roll
lever release.
5. Install the spool of wire into the Spool Gun
Assembly. Thread the wire through the input guide,
between the drive rolls, and into the output guide.
6. Engage the drive roll lever release and depress
the gun switch trigger. Adjust the wire feed speed to
the desired value by means of the wire feed control
in the Spool Gun Assembly handle.
7. Allow approximately 6 inches wire to run out.
Reinstall contact tip, nozzle assembly, gun cover,
and spool cover.
8. Cut off wire even with the end of the nozzle
assembly.
Welding Procedure:
WARNING: In semiautomatic or
automatic wire welding, the
welding wire, wire reel (if used),
input guide, feed rolls, output
guide, feedhead, and welding
gun metal parts are all ELECTRI-
CALLY “HOT”.
Refer to Figure 5-1.
Position the Spool Gun Assembly above the work-
piece and depress the gun switch trigger. Depress-
ing the gun switch trigger enables the gas valve,
wire feed motor, and power source; the welding
process begins. To end the weld, release the gun
switch trigger which disables the gas valve, wire
feed motor, and power source.
NOTE: At the end of the work day or when
welding has been completed, it is recom-
mended that the gas be SHUTOFF at the
cylinder, and the power source be turned
OFF.
Gun Switch
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Gas Valve
Wire Feed
Power Source
Figure 5-1 Functional Timing Diagram
430429-287
OPERATION
April 6, 1998 Revised 5-1