Tweco A 2000 Ultra-Feed - Manual (Page 27)

ULTRAFEED A 2000
May 1, 2006 4-1
SECTION 4:
OPERATION
4.01 Prewelding Procedure
Follow all installation instructions for the wire feeder, the
welding power source, and the welding gun before
attempting to operate the ULTRAFEED A 2000.
1. Make sure all necessary connections have been
made (Refer to “Connections” in the Installation
chapter of this manual).
2. Turn ON the power source and the wire feeder.
3. Push the PURGE switch of the feeder and adjust
the flow of shielding gas.
4. Push the INCH switch of the feeder and adjust
the wire feed speed to the desired value by means
of the wire feed speed control.
!
WARNING
If the gun switch is depressed, the electrode
(welding wire) is electrically “hot”. Do not
permit it to touch any metal or a welding arc
may be established which may be injurious to
someone’s eyes (flash) or skin (burn).
5. Adjust the voltage of the power source to the
desired value. The gun switch must be triggered
to close power source contactor.
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 ELECTRICALLY
“HOT”.
4.02 Front Panel Controls and
Connections
1. GUN SWITCH RECEPTACLE: The gun switch recep-
tacle accepts the welding gun control wires. The gun
switch receptacle is where a gun switch closure is
inputted to the wire feeder.
2. INCH/PURGE SWITCH: Depressing the INCH portion
of the switch will feed wire at a speed set by the WFS
control. The wire will not be elecrically hot when us-
ing the INCH switch. Depressing the PURGE portion
of the switch will allow shielding gas to flow out of the
welding gun without feeding wire.
3. POWER ON/OFF SWITCH: This switch is for the wire
feeder only and not the power source (welding ma-
chine). It is used as an on/off switch and also serves
as a circuit breaker.
NOTE:
If the circuit breaker trips, it turns the power
switch to the OFF position. A short cooling
period must be allowed before an attempt is
made to reset the unit by placing the switch in
the ON position.
4. Wire Feed Speed CONTROL: This knob controls wire
feed speed. The wire feed speed can be adjusted dur-
ing setup or actual welding.
Art # A-07320
A 2000 A 2000 A 2000
3
4
2
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Figure 4-1: Front Panel Controls and Connections