User Guide

B-4
OPERATION
B-4
Trigger Mode Selection
Trigger Mode Select key
- enables operator to
choose mode of operation
shown by the indicator
lights. Pressing key caus-
es mode lights to
sequence (top to bottom) starting from the current
indicated selection.
Top Light - Indicates gun trigger has been selected to
perform the Cold Feed Forward function in exactly the
same manner as Cold Feed Forward key (See
Operation Keys - Cold Feed Keys) with the same
memory stored adjustable speed setting, and “Cld”
shown on the top display.
Second Light - indicates 2-step (standard) trigger
mode.
1. Trigger closure energizes the solenoid valve, then
the wire feeder and the power source after
Preflow time.
2. Releasing the trigger turns off the wire feeder,
then power source after burnback time and then
the gas solenoid valve after Postflow time.
Third Light - indicates 4-step (lock) trigger mode.
This mode may be selected to include or exclude weld
current interlock. (See “4-Step Trigger Mode
Operation Selection” in this section for 4 step Trigger
Mode operation)
Bottom Light - indicates Spot Weld Mode, which will
only light if a spot time is set (See “Display Control
Keys” in this section). If set to 0.0 seconds, spot
mode light selection will be skipped. Trigger closure
energizes the gas solenoid valve, then wire feeder
and the power source. The spot timer starts when
current flows. The wire feeder and power source then
solenoid valve are all turned off when the spot on
timer times out even though the trigger is opened or is
still closed. Preflow/Postflow and burnback timers are
also functional in spot mode. (See “Display Control
Keys” in this section).
Display Control Keys
Control Select key - enables operator to
choose Run-in WFS, burnback, spot or
gas timers, as indicated by the appro-
priate light. Pressing the key causes
lights to sequence (top to bottom, then
all off) starting from the current indicat-
ed selection.
When burnback spot, or gas timers are selected the
current display shows the time setting in seconds, as
indicated by “SEC” displayed on the speed display.
The times are set using the top encoder knob.
When Run-in WFS is selected the WFS display shows
the Run-in WFS setting in in/min. or m/min.
Top Light - indicates Run-in WFS is being displayed.
Speed encoder knob can adjust, Run in speed
between minimum. Rated speed
and up to the Weld speed setting.
Run-in speed can not be set above
weld speed setting. A Run-in
speed setting of 100 IPM or less is
recommended for optimum start-
ing. Factory setting is near
minimum rated speed.
If set below minimum rated speed “- -” will show on
WFS display, indicated Run-In speed is set to match
Weld speed setting.
When trigger is closed (and preflow time is over) the
wire feeds at Run-In speed until the welding arc
strikes, which causes the feed speed and volts to
change to Weld settings.
If the arc does not strike within about 2 seconds, the
Run-In speed automatically changes to Weld speed to
permit “Hot” feeding at higher speed setting for load-
ing wire.
Second Light - indicates preflow time is being dis-
played, settable 0.0 to 2.5 seconds. (0.2 sec as
shipped). This is the time the shielding gas flows
before the wire feed and power source are activated.
Third Light - indicates spot time is being displayed,
settable 0.0 to 199.9 seconds (0.0 sec as shipped).
Fourth Light - indicates burnback time is being dis-
played, settable 0.00 to 0.25 seconds (0.0 sec as
shipped). This is the time the arc power is delayed at
the stop of the weld, and should be set to the lowest
time required to prevent the wire sticking in the weld.
Bottom Light - indicates postflow time is being dis-
played, settable 0.0 to 10.0 seconds (0.5 sec as
shipped). This is the time the shielding gas flows after
the wire feed and power source are deactivated.
Pressing Control Select Key again, or closing the gun
trigger, shuts all control lights off, indicating current
and Wire Feed Speed are again being displayed, and
set by the appropriate encoder knob.
STT-10
SPOT
TRIGGER
COLD FEED
2-STEP STD
4-STEP LOCK
CONTROL
SPOT
PREFLOW
1
RUN-IN
WFS
BURNBACK
POSTFLOW
2