ESAB Aristo U82, Instruction Manual

Page: 26 / 96

4 MIG/MAG WELDING
0460 896 274
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© ESAB AB 2013
Example:
You have 4 m/min as the final wire feed speed and lower the wire feed speed to 3.5 m/min.
The final wire feed speed will also be lowered to 3.5 m/min. The final wire speed remains at
3.5 m/min even when the wire feed speed is increased again.
Crater filling is activated in the measure screen or in the weld data setting menu → stop
data.
Pinch-off pulse
Pinch-off pulse is a pulse that is applied to ensure that a ball is not formed on the wire when
welding stops.
Applies to MIG/MAG welding with short/spray arc and short pulsing. When pulsing,
completion is synchronised with a pulse, finishing pulse, which can be set between 20 -
200%.
Pinch-off pulse is set in the weld data setting menu → stop data.
Burnback time
Burnback time is a delay between the time when the wire starts to brake until
the time when the power source switches off the welding voltage. Too short
burnback time results in a long wire stickout after completion of welding, with a
risk of the wire being caught in the solidifying weld pool. Too long a burnback
time results in a shorter stickout, with increased risk of the arc striking back to
the contact tip.
Burnback time is set in the weld data setting menu → stop data.
Termination
Select either Final pulse or SCT (Short Circuit Termination) here. SCT is a function that
gives small repeated short circuits at the end of welding until the wire feeding has totally
stopped and contact with the workpiece has been broken.
Termination is set in the weld data setting menu → stop data.
Applies to welding with feed units that support reversed wire feed.
Release pulse
If the wire becomes trapped in the workpiece, the system detects this. A current pulse is
sent out that releases the wire from the surface.
Applies to MIG/MAG welding with short/spray arc and short pulsing. When pulsing,
completion is synchronised with a pulse, finishing pulse, which can be set between
20 and 200%.
The setting is adjusted in the Configuration menu → MIG/MAG defaults.
Gas post-flow
This controls the time during which shielding gas flows after the arc is
extinguished.
Gas post-flow is set in the weld data setting menu → stop data.
Setting limits and measure limits
In limits, a limit number is selected. For settings, see the “Edit setting limits” and “Edit
measure limits” sections.
Limits are activated in the weld data setting menu.