Masterweld 321 HDP, Instruction Manual

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17/03/2014 v2.2
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10.1 WELDING PARAMETERS
Welding inductance
Consequences of a higher value:
−
"Softer welding".
−
Less spatter.
−
Less positive starting.
Consequences of a lower value:
−
"Harder welding".
−
More spatter.
−
More reliable starting.
Hot Start
This function is useful when using aluminium alloy welding wire.
Consequences of a higher value:
−
Greater heat output.
−
Greater penetration.
Consequences of a lower value:
−
"Cold" weld bead.
Crater Filler
This parameter serves to obtain a uniform deposit at the end of the
welding process to fill the crater with a reduced wire feed rate to
facilitate the deposition of filler material.
By keeping the torch trigger pressed during the 3rd time, the wire feed
rate is reduced (crater filler speed) thereby ensuring optimal crater
filling, until the POST GAS time is started by releasing the torch
trigger (4Th time).
Consequences of a higher value:
−
Difficult crater filling (values greater than 100%).
Consequences of a lower value:
−
Cold welding (values close to 1%).
3 Levels Slope
Establishes the duration of the slope between the 1st and 2nd time
and between the 3rd and 4Th time.
Soft Start
Determines the wire feed rate before the arc strike.
Calculated as a percentage of the programmed wire feed rate.
In Synergic welding the optimal soft start value (indicated with SYN)
varies in general with variations of the synergic parameters.
In Synergic welding, if the value soft start = SYN is selected the
welding power source will always have the optimal soft start value set
when the main welding parameter changes.
If you set a value other than SYN, this value is stored and fixed.
Consequences of a lower value:
−
The start of welding is "softer".
Consequences of a higher value:
−
The welding start may prove difficult.
Motor Slope
Time required to switch from SOFT START speed to welding speed.
Bourn Back
The burn back value is associated with the quantity of wire that is
burnt at the end of the welding procedure.
In Synergic welding the optimal burn back value (indicated with SYN)
varies in general with variations of the synergic parameters.
In Synergic welding, if the value burn back = SYN is selected the
welding power source will always have the optimal burn back value
set when the main welding parameter changes.
If you set a value other than SYN, this value is stored and fixed.
Consequences of a higher value:
−
Wire significantly retracted into the torch nozzle.
Consequences of a lower value:
−
Stick-out at welding start is longer.
Post gas time
Time of post gas delivery when the welding arc is extinguished.
This is useful when welding at high current values or with materials
that oxidise readily to cool the weld pool in an uncontaminated
atmosphere.
In the absence of specific requirements the value should generally be
kept low.
Consequences of a higher value:
−
More effective pickling (improved appearance of workpiece at the
end of the welding pass).
−
Higher gas consumption.
Consequences of a lower value:
−
Lower gas consumption.
−
Oxidation of electrode tip (more difficult arc strike).
Pre gas time
Time of gas delivery before the arc strike.
Consequences of a higher value:
−
This parameter allows a shielded environment to be created,
thereby eliminating contaminants at the start of the welding pass.