C-10
OPERATION
PULSE WELDING IN ARCLINK MODE
Pulse welding procedures are set by controlling an overall “arc
length” variable. When pulse welding, the arc voltage is highly
dependent upon the waveform. The peak current, back ground
current, rise time, fall time and pulse frequency all affect the voltage.
The exact voltage for a given wire feed speed can only be predicted
when all the pulsing waveform parameters are known. Using a preset
voltage becomes impractical and instead the arc length is set by
adjusting “trim” via the ArcLink compatible wire feeder for a given
wire feed speed setting.
Trim adjusts the arc length and ranges from 0.50 to 1.50 with a
nominal value of 1.00. Trim values greater than 1.00 increase the arc
length, while values less than 1.00 decrease the arc length.
(See Figure C.2)
All pulse welding programs in the Flextec™ 500 P are synergic. As
the wire feed speed is adjusted, the Flextec™ 500 P will
automatically recalculate the waveform parameters to maintain
similar arc properties.
The Flextec™ utilizes “adaptive control” to compensate for changes
in the electrical stick-out while welding. (Electrical stick-out is the
distance from the contact tip to the work piece.) The Flextec™
waveforms are optimized for a 0.75” stick-out. The adaptive behavior
supports a range of stick-outs from 0.50 to 1.25”. At very low or high
wire feed speeds, the adaptive range may be less due to reaching
physical limitations of the welding process.
FLEXTEC™ 500 P
Trim .50
Arc Length Short
Trim 1.00
Arc Length Medium
Trim 1.50
Arc Length Long
Figure C.2