Everlast Powertig 255 EXT Operator's Manual page 20

Section 2
FRONT PANEL FEATURES AND CONTROLS POWERTIG 255EXT/325EXT
POWERTIG 255EXT/325EXT
21. 2T/4T/ Pedal Selector
22. AC Waveform/DC Selector DC
23. Data Display
24. Standard/6010 Selector
25. Spot Weld Timer
26. Parameter Adjuster
27. Purge Gas
PARAMETERS PURPOSE
2T, 4T, Pedal, This selects the operation of the torch switch, pedal, or hand amptrol. To weld with the torch
Pedal with 2T, switch, select 2T or 4T. For 2T operation, simply press and hold the switch. The panel pro-
Pedal with 4T gram will cycle automatically. When the switch is released, the arc will downslope and termi-
nate with post gas flow. When in 4T mode, the switch is pressed, and held to start the pre-
flow and the start amps part of the cycle. When released, upslope begins and continues until
the amps are raised to the preset welding amps. When pressed and held again, downslope
starts and ramps down to the end amp stage (crater current). When released, the arc termi-
nates, and post flow begins. If desired, before the downslope finishes, the switch may be
tapped again to start the up slope again. To operate with the foot pedal, select pedal mode.
The features such as start amps, upslope, down slope, and end amps will function with the
pedal. Be sure to lower these features to the minimum values when the foot pedal is in use,
unless a desired effect is needed. The start amp feature can be particularly useful as a brief
"hot start" tig setting which provides an initial burst of amps to be to rapidly develop a pud-
dle. To operate with a hand amptrol, select Pedal, and then press the selector additionally to
select the 2T or 4T feature light. Both the Pedal and the 2T or 4T pedal will be lit. The
starting and ending of the arc will be the same as the standard 2T or 4T mode, except the
amps can be adjusted while welding with the amptrol. However, some amptrols have only a
a switch that is built into the amptrol mechanism, and is not controllable independently of
the amperage. When this type of amptrol is used, the unit should be placed into standard
pedal mode for proper operation.
The unit features AC/DC operation, with 4 standard wave forms available in AC for specialized
AC welding needs. The advanced square wave is the default mode and is the best all around
Advanced Square mode with excellent wet in, and arc controllability . Soft Square wave and Sine wave mimic
Soft Square the feel and effect of the transformer welders. The Soft square wave is similar to Square
Triangular wave transformers, and have a smooth, buttery feel, but maintains good control over the arc.
Sine The Sine wave is similar to much older sine wave transformer TIG welders. This offers the
softest arc, and affords less control than other modes. The Triangular wave is designed for
rapid wet in, and high speed travel on the metal. It also features rapid freeze of the puddle.
DC mode is the standard mode used for all metals except aluminum and magnesium. Alumi-
num and Magnesium should be welded in AC only.
Amps, Seconds The unit features a single main display. The data in the display is always accompanied by a
Percent, Hertz corresponding LED light which indicates the function being represented. This also includes a
Warning, On self diagnosing function which displays an error code and a corresponding warning light.
Standard Select the "Standard" mode for all stick welding except cellulosic rods. For E6010, 6011, and
other cellulosic rods select the default "6010" mode. This will improve arc performance and
stability while using E6010 and similar rods. If arc seems harsh while welding E7018, E7024,
E6013, E7014 or other similar rods, check to make sure "6010" mode is not engaged.
.5-25 Seconds This is used to set the arc-on time while making spot and tack welds or other welds of a re-
petitive nature. To set the spot time, press the spot weld button (25a) so the LED above it is
lit. Then, toggle the main select button until the spot weld light(25b) is lit up, and use the
main control knob to increase or decrease time. To use, select 2T and use torch remote
button. Press and hold the button to start the arc. The arc will automatically terminate after
the preset length of time has expired. Upslope and Downslope can be used to taper the arc
during long arc on times. However, if using for tacking , a 0 up slope and downslope time
may provide the best tack weld results.
N/A The control knob is used increase or decrease parameter values. To increase adjustment
speed, push in on the knob while turning. It will then adjust by increments of 10.
On/Off This feature is used to set gas flow and provide additional, untimed post flow cooling. To set
gas flow, press the touch panel button so the LED above it is lit. The gas should freely flow.
Then adjust the gas flow via the regulator. Press the button again to return to normal opera-
tion of the solenoid valve. This bypasses the need to set post flow and cycling the pedal or
torch switch briefly to get gas to flow. IMPORTANT: Do not forget to press button again to
turn the gas flow off after setting the gas flow rate or using it to provide extra cooling.
QUICK SETUP AND USE GUIDE
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