Table of Contents
Advertisement
7 WELDING
Arc length
This parameter provides the possibility of arc length adjustment from a shorter arc using a negative
offset to a longer arc using a positive offset setting.
Hot start
Hot start increases the wire feed speed and the voltage for an adjustable time at the start of the
welding process. The main purpose of this is to provide more energy when starting welding, which
reduces the risk of poor fusion at the beginning of the welding.
The hot start wire feed speed can be set as a percentage (50–150%) of the set wire feed speed (for
example, if the set wire feed speed is 10 m/min and the hot start wire feed speed is set to 50%, the
output will be 5 m/min). The voltage parameter is voltage for GMAW manual, voltage offset for
Synergy, and arc length offset for Pulse respectively.
Pre-flow
Pre-flow controls the time during which shielding gas flows before the arc is struck.
Creep start
Creep start feeds out the wire at a low wire feed speed until it makes electrical contact with the
workpiece.
Crater fill
Crater filling makes 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.
The crater fill wire feed speed can be set as a percentage (0–100%) of the set wire feed speed. The
minimum wire feed speed percentage will change depending on the set wire feed speed. The voltage
parameter is voltage for GMAW manual, voltage offset for Synergy, and arc length offset for Pulse
respectively.
Post-flow
This controls the time during which the shielding gas flows after the arc is extinguished.
Termination method
SCT
SCT is a function that generates small, repeated short circuits at the end of welding until the wire
feeding has totally stopped and contact with the workpiece has been broken.
SCT must not be used with cored wire.
Burnback
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 a burnback time results in a long wire stick out 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 stick out, with increased risk of the arc striking back to
the contact tip.
0463 786 001
- 52 -
© ESAB AB 2023
Advertisement
Table of Contents
