Everlast POWER i-MIG 253DP Operator's Manual page 45

Section 2
setting without giving you an indication that
you may be nearing the "sweet spot" for the
setting. As you adjust this setting, you will no-
tice a change in arc quality and in sound. This
is normal. Resist the temptation to go too far
toward the positive end of the scale or burn-
burn back and tip melting will become an is-
sue. This unit is programmed for using Stand-
ard shielding gases designed for use with Pulse
MIG. Different gas mixes may be used howev-
er. Each gas blend will result in a different
setting of the Voltage Offset feature. As more
CO2 is used in the shielding gas (always use
20% or less), you will need to increase the val-
ue of Voltage Offet. Lower concentrations re-
quire less Voltage Offset.
Remember, the pulse feature is intended to be
used to control heat input and improve out of
position welding capability without creating
large sacrifices in travel speed or penetration.
Even before attempting to set the voltage off-
set, begin by setting wire speed feed/amps
to match metal thickness. Usually this is 1
amp per .001" of thickness. This is an old rule
of thumb and is not accurate in every case.
You will notice that when pulsing the unit ac-
tually deviates from the settings selected be-
cause it is averaging the pulsed values to com-
pensate. This is not a defect. With synergic
Single Pulse, keep in mind that the Amps con-
trol penetration and too many amps can pro-
duce burn through. If in doubt, use the wire
manufacturer's suggested settings found on
the packaging or in their published materials.
In the absence of these references, if you do
not know an approximate setting for Amps,
you can use the formulas suggested earlier in
this manual to determine the approximate
wire feed speed/amp value. After initially
set, Amps should only be adjusted again after
Setup Guide and component Identification
PULSE MIG OPERATION
no workable setting for the Voltage Offset or
Inductance has been found. Avoid radical
changes in Amps. A space of 3 or 4 Amps can
yield a much different level of performance.
Below you will find the three Single Pulse pa-
rameters that are synergically controlled.
and their basic effects on the weld identified
along with additional features affecting the
performance of the single-pulse feature of
this unit.
Double Pulse Explanation. The double-pulse
features more manual control over the weld
cycle than the Single Pulse does. However, it
is still considered to be synergic in function.
This is because the Double-Pulse relies upon
the Synergically adjusted Single Pulse. The
Double-Pulse is simply two separate settings of
Single Pulse, which alternate from .1 to 9.9
times a second. The Peak Pulse value for the
Double Pulse is set just as you would with the
Single Pulse. Both Amps and the Voltage off-
set can be adjusted. The Base Pulse Value for
the Double Pulse is set identically. The pro-
gramming of the machine sets each half of the
pulse cycle synergically. This "layering" of the
pulse creates a heating phase and a cooling
phase during one cycle of the Pulse. The
Heating stage (notated on the machine as
Peak LED) provides the primary melting and
advancement of the weld puddle. The Cooling
stage, or the base (notated as the welding LED
on the machine) keeps the arc going, but the
puddle is discernably cooler and the metal be-
gins to solidify, creating a single ripple. Do not
try to set the base as the higher value. Set
the Peak as the higher value and the Welding
setting as the lower, base value. Doing so
may confuse the operator and the program-
ming of the machine, resulting in poor weld
45