Gas Post−Flow; Air Post−Flow; Crater Filling; Burnback Time - ESAB PEK A2 Instruction Manual

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6.16 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 under stop data.
6.17 Air post−flow
This controls the time during which air flows after the arc is extinguished.
− Air post−flow is set in the weld data setting menu under stop data.
6.18

Crater filling

Crater filling makes a controlled reduction in the heat and size of the weld pool
possible when completing the weld. This makes it easier to avoid pores, thermal
cracking and crater formation in the weld joint.
− Crate filling is set in the weld data setting menu under stop data.
6.19

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 arc 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 under stop data.
6.20

Stop phases

Stop phases are mainly used for setting crater filling.
The following can be set for Stop
phase1 ON
S Time s
Time for welding in phase 1.
S Arc voltage %
In percent of set voltage
S Wire feed %
In percent of set wire feed
S Welding current %
In percent of set welding current
S Travel speed %
In percent of set travel speed
− Stop phases are set in the weld data setting menu under stop data.
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The following can be set for Stop
phase2 ON
S Time s
Time for welding in phase 2.
S Arc voltage %
In percent of set voltage
S Wire feed %
In percent of set wire feed
S Welding current %
In percent of set welding current
S Travel speed %
In percent of set travel speed
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