Full Product Manual

27
8. Arc Force Control/Surge Amp Control. When sck weld-
ing, arc force is used to help improve weldability of certain
metals and welding rods. The arc force boosts current ow
to match the demands of arc length and posion. As an arc
is held shorter, voltage tends to drop so extra amps are
introduced to help maintain a steady arc. Surge amps boost
the starng amperage briey to heat up the welding elec-
trode and weld area so the arc starts cleanly, without sck-
ing or porosity. Both controls are inacve while welding in
TIG mode.
9. Foot Pedal. 22k Ω . Select 2T on the panel. Select maxi-
mum amp value desired on the panel. The foot pedal will
only control amps up to the range governed on the front
panel. If more amperage is needed raise the amp level on
the panel. The foot pedal also controls both Welding Amps
and Pulse Amps through the rao established by selecng
the pulse Amp % on the panel. Welding with pulse and the
foot pedal takes pracce, as it will seem the welder is weld-
ing at less amps than it is. Always set the panel amps to
about 25% more than what should be needed. Increasing
the amps more than this margin on the panel will reduce
the accuracy of the foot pedal by lowering the resoluon of
the foot pedal. Be sure to turn the start/end amps and up/
down slope to the minimum seng or it will interfere with
pedal operaon. The pedal cannot override the start/end
amp and slope controls. For more accurate and responsive
control, Everlast oers a US made foot pedal available as
an addional opon. Do not aempt to control sck func-
on with the foot pedal.
10. Water-cooled and Air-cooled torches. (20/18 and
9/17/26 series). A water cooler is necessary for use with
the water- cooled 18/20 series torches and to reach the
maximum current potenal of the unit. Using a water-
cooled torch even briey without water can seriously and
permanently damage your torch. The Power Cool 300 may
be purchased separately from Everlast which is designed to
cool the torch up to the maximum amp capacity of the
welder. If you are not have a water cooler or have not pur-
chased a water cooler, you will need to use the air-cooled
(gas -cooled) series torch that is included with the unit.
Keep in mind that the 100% duty cycle mark on the Air
cooled series is much lower and are usually rated for max
amps at their 60% duty cycle mark. The air cooled torch
may be used at slightly higher amperages but the torch
duty cycle will be reduced and the potenal to overheat
and damage the torch exists. Overheated torches are not
warrantable. All consumables should be interchangeable
with other brand torches with similar designaons ie xx26,
xx17, or xx20. They should be available for local purchase.
50-75% Pulse Amp seng is typically used to help
with ming the addion of ller metal to the weld
puddle. A higher pulse frequency level with variaons
in Pulse Time On and a narrow/wider rao can be used
to prevent burn through and speed up welding on thin
materials. It can also help maintain a proper bead on a
thin edge weld or prevent burn through on extremely
thin metal. A fast pulse speed will make ne ripples in
the weld while a slow pulse speed will give a much
more coarse, but visually appealing result. There are
limitless ways to adjust the pulse. Keep in mind
though, that the basic purpose of the pulse is to aver-
age the heat input while maintaining penetraon.
7. Advanced Pulse (AC only). The Advanced Pulse is a
feature not typically found on most pulse type TIG
welders. In the “advanced” mode, the unit pulses
current back and forth between AC and DC – polarity.
This is designed primarily for use with welding alumi-
num, and is accessible only when used in AC mode.
The purpose of Advanced Pulse mode is to create a
quick freezing puddle, and oer more denion of the
puddle ripples. It is also useful for controlling cleaning
width, and for heat input control on thin gauge alumi-
num. AC is assigned as the welding amps seng
(pulse peak), and the DC— is assigned as the pulse
amps % ( base value). Otherwise, the pulse frequency,
and pulse me on are adjusted the same and perform
the same funcon as the standard pulse mode adjust-
ments. Occasionally during use, a slight wobble of the
arc may be seen as it pulses between AC and DC—.
This is usually observed if the frequency is set low and
the metal is highly oxidized, the arc length is too long,
or the work clamp is not connected securely. If this
happens, readjust the work clamp, re-clean the metal
and /or shorten the arc length. If pulsing slowly, the
ller should be added on the audible AC stage of the
pulse as this is the hoer stage of the pulse. Note: The
graph below has been simplied for clarity. It is de-
signed to show the relaonship and interacon be-
tween the AC and DC parts of the pulse and does not
depict the eect of AC frequency cycling between —
and + polarity during the pulse cycle.
2 S
AMPS
Time
1 S
3 S
50
100
Pulse Amps (DC-)
Welding Amps (AC)
Pulse Time ON
Pulse Hz
Basic Theory and Function Section 3