Lincoln Electric IM892 POWER FEED 25M - Manual (Page 59)

B-43 OPERATION B-43
EXAMPLE 1 - 2 STEP TRIGGER: Simple operation
The simplest trigger operation occurs with a 2 Step
trigger and the Start, Crater and Burnback functions
all set to OFF. (See Figure B.19)
For this sequence,
PREFLOW:
Shielding gas begins to flow immediately when the
gun trigger is pulled.
RUN-IN:
After preflow time expires, the power source regulates
to the welding output and wire is advanced towards
the work piece at the Run-In WFS. If an arc is not
established within 1.5 seconds, the wire feed speed
will jump to the welding wire feed speed
WELD:
The power source output and the wire feed speed
continue at the weld settings for as long as the trigger
is pulled.
POSTFLOW: As soon as the trigger is released, the
power source output and the wire feed speed are
turned OFF. Shielding gas continues until the post
flow timer expires.
POWER FEED™ 25M
Shielding
Gas
Idle Preflow Run-In Weld Pos tflow Idle
Power
Source
Output
WFS
O n
O ff
Run- in
O ff
Wel d
O ff
Wel d
Arc
Established
T
rigger
Pulled
T
rigger
Released
2 Step Tri gger
Start = OFF
Crater = OFF
Burnback = OFF
1.5 sec max.
FIGURE B.19