Weco Discovery 200 S, Instruction Manual

Page: 8 / 14

Cod.006.0001.1320
22/05/2019 v2.8
ENGLISH
Discovery 200 S
8/14
3.2 WELDING PARAMETERS
PARAMETER MIN DEFAULT MAX NOTES
WELDING CURRENT (MMA) 5 A - 200 A
WELDING CURRENT (TIG) 5 A - 200 A
PULSED CURRENT FREQUENCY 0.5 Hz - 250 Hz
BASE CURRENT 10 % - 90 % Percentage of welding current.
HOT-START 0 % - 100 % Percentage of welding current.
ARC FORCE 0 % - 100 % Percentage of welding current.
WELDING CURRENT
Output current value during welding.
HOT-START
This parameter aids electrode melting at the time of arc striking.
Consequences of a higher value:
- Easier arc strike.
- Increased spatter at welding start.
- Increase of strike area.
Consequences of a lower value:
- More difficult arc strike.
- Less spatter at welding start.
- Smaller strike area.
ARC FORCE
This parameter helps to avoid electrode sticking during welding.
During electrode fusion low conductivity parts of the coating become
detached and tend to become interposed between the electrode tip as
it is fusing and the workpiece. This condition results in an interruption
of the arc. In addition, it may occur that the electrode comes into
contact with the workpiece creating a short circuit and consequent
quenching of the arc. To avoid arc quenching the power source
therefore delivers instantaneous peak currents in correspondence
with preset arc voltage thresholds.
Consequences of a higher value:
- Fluidity during welding.
- Welding arc stability.
- Greater electrode fusion in workpiece.
- More welding spatter.
Consequences of a lower value:
- The arc is extinguished more easily.
- Less welding spatter.
BASE CURRENT
Pulsed wave minimum current.
Consequences of a higher value:
- Faster creation of weld pool.
- Increase of heat-affected zone.
PULSED CURRENT FREQUENCY
Consequences of a higher value:
- Slower melt speed.
- Reduction of heat-affected zone.