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While operating in GMAW-S (short circuit) mode, the weld power control will set the
average power supplied to the weld.
Selecting an operating point requires a balanced selection of gas, wire diameter,
proper wire feed speed, and weld power. The weld puddle control should remain
at the mid-point during the initial adjustment until a suitable combination of weld
power and wire feed speed is obtained. It is after this point that an adjustment to
the weld puddle control can be made if desired.
If higher Current than in short-circuit applications is desired, the process switch can
be placed in the GMAW spray position. This process will switch the power supply
out of the Low-Current Electronic Control Mode, and into Dynamic Response
Mode. Excellent, crisp short-arcing can then be performed on a variety of plate
thickness’ and current levels.
Operators should note that the font panel calibration on the Weld Power knob is
calibrated for MIG and not for Stick welding.
4.3.5
Short Arc Puddle Control
The short arc puddle control knob only controls the puddle characteristics in the
GMAW (short) mode. In the SMAW mode, the knob controls arc force.
In GMAW, the lower settings of this control are designed for out-of-position welding
while the upper settings are designed for flat welding and cellulose.
In SMAW, the lower settings are designed for minimum arc force with the higher
settings set for maximum arc force.
NOTE:
The process selection switch must be in GMAW (short mode) for the short arc puddle control to
be operative. The puddle control can be adjusted while the unit is under load.
Use the puddle control to adjust the weld puddle characteristics you desire to suit your
application. Typically, the colder settings are for out-of-position welds while the hotter settings
are for flat welding. The weld puddle control is also responsible for regulating both the rate and
the amount of power delivered during each mode of the short circuit transfer. Adding more
puddle control (which increases the power delivered during the arcing period) will cause the arc
to become hotter. Decreasing the puddle control causes a colder arc by reversing the power
delivery schedule. Changing the puddle control will also alter the weld droplet size, which will
increase during hotter settings and decrease during colder setting. Keep in mind, the larger the
droplet size, the lower the frequency of drops.
4.3.6 Arc Force Control
This control is used to adjust the Arc Force on constant current applications. The
control is fully adjustable from 0 to 100%, with 0 being very soft and 100% being
very hard. When adjusting the Arc Force, the low settings will produce a soft arc
and the high settings will produce a more forceful or driving arc. Please note that
the higher settings will produce higher levels of spatter.
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