Constant Voltage Welding Synergic Cv; Non Synergic Cv; All Cv Modes; Pulse Welding - Lincoln Electric POWER WAVE S500 Service Manual

B-7
SMAW (STICK) WELDING
The welding current and Arc Force settings can be set
through a Power Feed™ 10M or Power Feed™ 25M
wire feeder. Alternatively an optional Stick / Tig UI can
be installed into the power source to control these set-
tings locally.
In a SMAW (STICK mode), Arc Force can be adjusted.
It can be set to the lower range for a soft and less pen-
etrating arc characteristic (negative numeric values) or
to the higher range (positive numeric values) for a crisp
and more penetrating arc. Normally, when welding with
cellulosic types of electrodes (E6010, E7010, E6011),
a higher energy arc is required to maintain arc stabili-
ty. This is usually indicated when the electrode sticks to
the work-piece or when the arc becomes unstable dur-
ing manipulative technique. For low hydrogen types of
electrodes (E7018, E8018, E9018, etc.) a softer arc is
usually desirable and the lower end of the Arc Control
suits these types of electrodes. In either case the arc
control is available to increase or decrease the energy
level delivered to the arc.
GTAW (TIG) WELDING
The welding current can be set through a Power
Feed™ 10M or Power Feed™ 25M wire feeder.
Alternatively an optional Stick / Tig UI can be installed
into the power source to control these settings locally.
The TIG mode features continuous control from 5 to
550 amps with the use of an optional foot amptrol. The
Power Wave S500 can be run in either a Touch Start
®
TIG mode or Scratch start TIG mode.
CONSTANT VOLTAGE WELDING
SYNERGIC CV
For each wire feed speed, a corresponding voltage is
preprogrammed into the machine through special soft-
ware at the factory.
Arc Length Short
OPERATION
FIGURE B.3
Trim 1.00
Trim .50
Arc Length Medium
POWER WAVE
The nominal preprogrammed voltage is the best aver-
age voltage for a given wire feed speed, but may be
adjusted to preference. When the wire feed speed
changes, the Power Wave
the voltage level correspondingly to maintain similar
arc characteristics throughout the WFS range.

NON SYNERGIC CV

In non-synergic modes, the WFS control behaves
more like a conventional CV power source where WFS
and voltage are independent adjustments. Therefore
to maintain the arc characteristics, the operator must
adjust the voltage to compensate for any changes
made to the WFS.

ALL CV MODES

Pinch adjusts the apparent inductance of the wave
shape. The "pinch" function is inversely proportional to
inductance. Therefore, increasing Pinch Control
greater than 0.0 results in a crisper arc (more spatter)
while decreasing the Pinch Control to less than 0.0
provides a softer arc (less spatter).

PULSE WELDING

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. Voltage or Trim can be adjusted.
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 B.3.
Trim 1.50
Arc L ength Long
® S500
B-7
S500 automatically adjusts
®