Everlast POWER i-MIG 253DP Operator's Manual page 25

Section 2
253DPi, this value is represented by "Hertz" or "Hz".
Hertz is the international standard used to represent
any type of basic frequency. One Hertz equals one
full Pulse cycle per second, or more simply, one pulse
per second. This unit is designed to cycle between .1
and 9.9 Hz in Double Pulse Mode. Keep in mind, that
this is how fast the Double Pulse cycles, not how fast
the single pulse cycles. The Pulse Frequency (Hz) of
the Single-Pulse is set by factory programming
(synergically) and is based off user input of wire di-
ameter, filler type and metal thickness (Amps). As-
suming the same travel speed, lowering the Pulse
rate (Hz) results in greater definition and distance
between the weld ripples. Increasing the Pulse rate
results in tighter stacking of the ripples. Increasing
the Pulse rate does have the advantage of con-
stricting the arc, and reducing the width of the bead
but may result in less desirable appearance. When
setting up the Double-Pulse for the first time, start
with 1 to 3 pulses per second to offer the best bal-
ance of ripple spacing and puddle control until tech-
nique and experience is developed.
7. Welding Mode Control. This LED represents the
default setting of the welder. It represents similar but
different values in each welding mode. In Standard,
Non-Pulse MIG mode: This represents the mode in
which you adjust Amps and Volts. In Synergic, Non-
Pulse MIG mode: This represents the mode in which
you adjust Amps and Voltage Offset (Trim). While
adjusting the Voltage Offset, you will see the Offset
displayed and then a briefly see the actual voltage
that has been assigned to the setting. Offset Values
will be between –5 to +5. In Single-Pulse Mode:
This represents the mode in which you adjust Amps
and Voltage Offset. (Trim). Voltage Offset values will
be between –5 to +5. You will see no reflection of
true voltage since Voltage is Pulsing rapidly between
two factory preset levels and is irrelevant until the
weld is started. Double-Pulse Mode: This represents
the "Base" stage of the Double-Pulse welding mode.
This is the low Pulse layer of the Double-Pulse mode.
In comparison to the "Peak" Pulse value in item #4 on
this page both Amps and Volts are pulsed synergically
at a lower average value. This layer of the pulse is
used as the cooling stage, or the freezing stage that
allows the weld puddle to cool to the point that it
creates the desired "ripple" in the weld. When used
correctly, this creates the "Stack-of-Dimes" look that
simulates TIG welding. Keep in mind that this func-
tion should be set to a lower value than the "Peak"
Double-Pulse value to achieve desirable results.
Setup Guide and component Identification
Setting the "base" layer too high will result in little pud-
dle cooling. This will manifest itself in too much puddle
fluidity. For a beginning setting, try setting the Amps at
a 50% value of the Peak. Keep the Voltage Offset at the
same value as used in the "Peak" value. As skill devel-
ops, some variation of the Voltage offset may be experi-
mented with, but as a general rule, changing the Volt-
age Offset in either the Peak or the Base layer will result
in varying arc lengths which may destabilize the arc and
increase spatter.
8. End/ Arc Termination Control. The End LED repre-
sents the final active welding setting of the weld. This
end stage of the weld cycle is used to complete the
weld in 4T mode and 4T special mode. This is used to fill
the crater at the end of the weld using a lower setting
that used for welding. By retriggering the torch trigger
ad holding, the weld will begin to cool and the arc re-
duce. The wire feeding will terminate when the gun
trigger is released. In this mode, be sure to set a lower
Amp value than used for normal welding. Typically,
there is no reason to alter Volt offset, but if problems
are encountered with too short of an arc during this
phase, set the Volt offset to a lower setting.
9. Burn-Back Timer Control. The burn-back timer con-
trols the amount of time that the arc stays engaged
after the trigger is released and the wire feeding stops.
This is to help reduce wire stick out and reduce the
need to trim the wire before starting another weld.
Also, it helps to prevent craters in the weld by tapering
off the heat during arc termination. A final benefit of
burn-back control is that it prevents the wire from stick-
ing in the weld puddle once the arc is stopped. For best
results this should be combined with the Post-flow
setting in mind so wire does not become oxidized dur-
ing the burn-back process. (As a "best practice" keep
Post-Flow activated at least one second longer than
burn back, more if welding thick metal at high amps.)
If too much burn-back time is used, the wire may burn
back up into the tip and seize. Increase burn back by
only increments of .05 to .06 of a second to prevent
over adjusting the burn back and destroying the contact
tip. Generally, burn-back control will produce con-
sistent results and increase productivity. Different wire
diameters and feed rates will change the burn-back
time requirement. However, it is best to keep burn -
back time, until personal experimentation yields better
results, at a relatively low setting, less than .1 seconds.
Minimum burn-back time is .01 Seconds. Keep in mind
burn back control is another tool designed to help in-
crease quality and repeatability of welds. Burn back
control is available in all MIG welding Modes.
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