Operation Keys; Trigger Mode Selection - Lincoln Electric SVM143-A Operator's Manual

B-6
Dual procedure settings, including; trigger mode, cold
feed speed, Run-in and weld speed and voltage,
timers and acceleration are automatically saved for
each feeder when power is removed. This feature
does not require batteries and when power is restored
it will automatically return all settings to the state they
were in when power was removed. The operator may
overwrite any or all of these settings following power
up recall.

Operation Keys

1 Feeder Lights - Indicate the wire feed
2
head selected for procedure, mode,
timer and cold feed functions settings.
FEEDER
The feeder may be selected by press-
ing the Feeder select key, or by the last
feeder gun trigger that was closed.
Procedure Lights - Indicate which
A REMOTE
B
procedure (A or B) is selected for the
selected feeder. A and B procedure for
Feeder 1 is independently set from A
PROCEDURE
and B Procedure for Feeder 2. The
Procedure select key selects A or B, or
if REMOTE Light is selected, the pro-
cedure selection light is controlled by
connection of an optional Dual Procedure gun switch
(K683-1, -3) or Dual Procedure Remote Control
(K1449-1).
COLD FEED COLD FEED
REVERSE
FORWARD
set at 200 IPM, but is adjustable with WFS encoder
knob and displayed on WFS display (with "Cld" shown
on the Voltage display) only while pressing Cold Feed
Forward, and the last speed set is stored in memory
for the next cold feeding, unless changed in Cold
Feed trigger mode (see following section). Cold Feed
Reverse retracts wire at a fixed 80 IPM speed which is
not adjustable.
Gas Purge key - energizes the gas
GAS PURGE
solenoid valve but not the wire feeder or
power source.
OPERATION
Cold Feed Keys - energize
the wire feeder but not the
power source or gas sole-
noid valve. Cold Feed
Forward speed is factory

Trigger Mode Selection

COLD FEED
TRIGGER
2-STEP STD
4-STEP LOCK
SPOT
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 Voltage 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 ener-
gizes 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 sole-
noid 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).
DH-10
B-6
Trigger Mode Select key -
enables operator to choose
mode of operation shown by
the indicator lights. Pressing
key causes mode lights to
sequence (top to bottom)
starting from the current indi-
cated selection.