Lincoln Electric IM892-C manual Preflow, Run-In, Weld

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.

FIGURE B.19

Trigger Pulled

Arc Established

2 Step Trigger

Start = OFF

Crater = OFF

Burnback = OFF

Trigger Released

Idle Preflow Run-In Weld Postflow Idle

Shielding O n

Gas

O ff

	Weld
Power
Source	1.5 sec max.
Output
	O ff

Weld

WFS

Run- in

O ff

POWER FEED™ 25M