Tweco VA 2000 Ultra-Feed - Manual (Page 28)

ULTRAFEED VA 2000
4-2 February 27, 2006
6. GROUND FAULT INDICATOR: This red LED comes
on when a ground fault condition occurs. If this LED
comes on, power will have to be reset to the wire
feeder (see the Operation chapter included in this
manual).
7. TRIGGER HOLD SWITCH: This switch selects either
2 Step or 4 Step gun switch mode. A detailed theory
of operation for both modes is given in the Operation
chapter of this manual.
8. FEED MONITOR DISPLAY: This LED bar graph display
provides visual information on the wire drive system
feeding characteristics. A more detailed explanation
of this feature is given in the Operation chapter of
this manual.
9. ARC VOLTAGE CONTROL: This knob controls arc
voltage or pulse frequency from the power source.
The arc voltage control can be adjusted during setup
or actual welding.
NOTE:
The power source must be in the REMOTE
position for this function to work.
10.WFS CONTROL: This knob controls wire feed speed.
The wire feed speed can be adjusted during setup or
actual welding.
11.OPTIONAL FUNCTION TIMERS: These knobs provide
timed control over preflow/postflow gas, wire
burnback distance and spot weld time.
.
4.02 Front Panel
1. GUN SWITCH RECEPTACLE: The gun switch
receptacle accepts the welding gun control wires. The
gun switch receptacle is where a gun switch closure
is input 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 electrically hot when using
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 only the wire
feeder and not the power source (welding machine).
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. WFS/VOLTS DISPLAY SWITCH: This switch selects
whether the LED meter will display preset wire feed
speed, or arc voltage (preset when not welding, actual
when welding).
5. LED METER: This meter displays preset wire feed
speed (selectable in IPM or MPM), and arc voltage
(VOLTS, preset when not welding, actual when
welding). The green LEDs to the left of the meter show
what is being displayed on the meter.