WO 100 2 - ESAB

GB
For welding with a pulsed wire feed speed, both the peak wire feed and the
background wire feed parameters need to be entered.
The pulsed wire feed speed is always automatically synchronized with the welding
current so that the wire feed speed is high when using peak current and low when
using background current.
3.4 Rotation
Used to indicate the rotation speed of the electrode around the workpiece. It is
indicated in mm/min.
The rotation speed can be pulsed or continuous (not pulsed).
Four parameters are represented in the parameter group for rotation:
S Rotation speed
S Rotation direction
S Pulsed rotation
S Slope, see point 3.7.
Pulsed rotation is automatically synchronized with the welding current so that the
welding tool is stationary at peak current and rotates at background current.
3.5 Gas
Three parameters are represented in the parameter group for shielding gas:
S Weld gas
S Start gas
S Root gas
Weld gas refers to the shielding gas on the upper side of the weld joint. The weld
gas parameter indicates how long the shielding gas is to flow on the upper side of
the joint before and after welding. The weld gas is monitored by a flow guard min.
4.5 l/min.
Some shielding gases, for example, helium (He), can cause problems with regard to
igniting the arc. If this type of shielding gas is to be used as weld gas, it may be
advisable to use a different gas mixture at the actual instance of starting, a so--called
start gas.
Root gas refers to the shielding gas on the underside of the weld joint. The root gas
parameter indicates how long the shielding gas is to flow on the underside of the
joint before and after welding.
If one value is entered for weld gas and another for start gas in sector 1, only the
start gas will flow. The weld gas starts flowing once the arc is ignited.
3.6 Preheating
Preheating is used to heat the workpiece at the starting point in order to ensure
correct penetration of the molten pool and is defined as the time elapsing between
arc ignition and the start of the rotary motion. If no value has been entered for
preheating, rotation will start as soon as the arc ignites.
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