Weco Pioneer Pulse 321MKS, Instruction Manual, Page: 25 / 48

Cod . 006.0001.1600
11/07/2022 V.2.12
Pioneer 321 MKS
25
ENGLISH
NOTE: A value >0 produces an increase in the length of the welding arc, while a value <0 produces a
shorter arc.
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.
PRE GAS
Time of gas delivery before the arc strike.
CAUTION: an excessively long value will slow the welding procedure. Other than in the presence of
special requirements the value should generally be kept at 0.0 s or anyway very low.
Consequences of a higher value:
- This parameter allows a shielded environment to be created, thereby eliminating contaminants at
the start of the welding pass.
SOFT START
The soft start is the wire approach speed to the workpiece.
The value is expressed as a percentage of the set feed rate.
Consequences of a lower value:
- The start of welding is “softer”.
Consequences of a higher value:
- The welding start may prove difficult.
BURN BACK
The burn back value is associated with the quantity of wire that is burnt at the end of the welding pro -
cedure.
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 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).