Lincoln Electric IM956 POWER WAVE C300 - Manual (Page 42)

B-21 OPERATION B-21
POWER WAVE ® C300
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.11)
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.
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.11