Step / 4 Step Operation - Lincoln Electric POWER FEED IM916 Operator's Manual

Dual wire feeder
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Recalling from Memory
To recall the contents of a memory into the active proce-
dure, momentarily push the desired memory button (for
less than 2 seconds). The saved parameters will be
copied into the active procedure, and the LED of the
memory button will light indicating the source of the infor-
mation. As with saving to memory, this light will remain lit
as long as the contents of the source memory remain
equal to the contents of the associated procedure.
If a constant current mode is saved to memory with the
power source in the "on" state, the "on" status will be
changed to "off" when the procedure is recalled. This
prevents a potential safety hazard if a memory button is
pushed and the power source unexpectedly turns on.

2 STEP / 4 STEP OPERATION

The Wire Drive has a 2 Step / 4 Step switch located
near the gun connector. 2-Step Trigger Mode opera-
tion requires the operator hold the gun trigger closed
in order to weld. 4-Step Trigger Mode eliminates the
need to hold the gun trigger closed while welding.
User-selectable 4-step modes with or without current
interlock. The switch in the down position will enable
2-Step operation and in the up position enables 4 -
Step operation. This switch has no effect in CC modes
of operation, such as stick welding. Both 2 and 4 -
Step can be operated in Synergic and Non-Synergic
modes. In a Synergic mode, machine output tracks
Wire Feed Speed (WFS) during welding. In Non-
Synergic modes, machine output is independent of
WFS.
2 Step Synergic Operation:
Without Start/Crater/Burnback functions active
Waveform Sequence:
1. Trigger is pulled; Preflow sequence begins and
runs until preflow timer expires.
2. Run-In sequence initiates until Arc is established.
3. Arc established; Weld sequence begins.
4. Trigger released (Arc extinguished); Postflow
sequence begins and runs until postflow timer
expires.
5. End of sequence.
1
2
3
WFS vs. Work point Waveform
= solid line represents WFS
---= dashed line represents Work point or Machine Output
OPERATION
2 Step Synergic Operation:
With burnback function active.
Waveform Sequence:
1. Trigger is pulled; Preflow sequence begins and
2. Run-In sequence initiates until Arc is established.
3. Arc established; Weld sequence begins.
4. Trigger released (Arc extinguished); Burnback
5. Postflow sequence begins and runs until postflow
6. End of sequence.
1
---= dashed line represents Work point or Machine Output
2 Step Synergic Operation:
With Start/Crater/burnback functions active.
Waveform Sequence:
1. Trigger is pulled; Preflow sequence begins and
2. Run-In sequence initiates until Arc is established.
3. Arc established; Start sequence begins and runs
4. Weld sequence begins.
5. Trigger released; Crater sequence begins and runs
6. Arc Extinguished; Burnback sequence begins and
7. Postflow sequence begins and runs until postflow
8. End of process.
1
4
5
---= dashed line represents Work point or Machine Output
POWER FEED™ 10M DUAL WIRE FEEDER
runs until preflow timer expires.
sequence begins and runs until burnback timer
expires.
timer expires.
2
3
WFS vs. Work point (Output) Waveform
= solid line represents WFS
runs until preflow timer expires.
for the amount of time set.
until crater timer expires.
runs until burnback timer expires.
timer expires.
2
3
4
WFS vs. Work point (Output) Waveform
= solid line represents WFS
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4
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Power feed 10m

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