Step trigger – Lincoln Electric IM10180 POWER FEED 25M NNS User Manual
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OPERATION
POWER FEED™ 25M NNS
2-Step Trigger
2-Step Trigger controls the welding sequence in direct response to the trigger. When the gun trigger is pulled, the welding system
(power source and wire feeder) cycles through the arc starting sequence and into the main welding parameters. The welding system
will continue to weld as long as the gun trigger is activated. Once the trigger is released, the welding system cycles through the arc
ending steps.
Example 1: 2-Step Trigger: Simple operation
The simplest trigger operation occurs with a 2-Step trigger and Start and Crater set to OFF.
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 2.0 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.
Ar
c Established
T
rigger Released
T
rigger Pulled