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5. The crater filler level continues for the crater time, which is settable in
seconds; at the end of this time welding is interrupted and the post gas
stage is performed.
3 LEVEL - 2T SPOT MIG/MAG WELDING
The welding process is the same as the 2T - 3 LEVELS process, except that
the welding procedure continues, at the preset current, for the time set with
the spot time parameter.
The weld is closed in the same way as with the 4T - 3 LEVELS process.
3 LEVEL - 4T B-LEVEL MIG/MAG WELDING
1. Bring the torch up to the workpiece.
2. Press (1T) the torch trigger.
The wire advances at the approach speed until making contact with the
work.
The welding arc strikes and the wire feed rate changes to the first
welding level (hot start), which is set as a percentage of the normal
welding feed rate.
This first level is used to create the weld pool: for example, when
welding aluminium a value of 130% is recommended.
3. Release (2T) the trigger to switch to normal welding speed; the switch
to normal welding speed is performed in accordance with the start
ramp, which can be set in seconds.
4. Press the torch trigger again (Level 3) to switch to the third welding
level (crater filler), which is set as a percentage of the normal welding
feed rate.
The switch of welding current level in terms of crater filling is performed
in accordance with the crater ramp, which can be set in seconds.
This third level is used to complete the weld and fill the final crater
(crater filler) in the weld pool: for example, when welding aluminium a
value of 80% is recommended.
5. Release the torch trigger a second time (4T) to close the weld and run
the post gas procedure.
3 LEVEL - 4T B-LEVEL MIG/MAG WELDING
The welding process is the same as the 4T - 3 LEVELS process except
that during normal speed welding pressing and immediately releasing the
torch trigger switches the unit to the second welding current.
The trigger must not be pressed for more than 0.3 seconds; otherwise,
the weld completion stage will start.
When the trigger is pressed and released immediately, the system
returns to the welding current.