Protective Gas; Ac Tig Welding Quick Start Up - Lincoln Electric invertec v205-t Operator's Manual

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PROTECTIVE GAS

Both argon and helium work when welding aluminum.
Argon is preferred, due to its lower cost and consump-
tion. This gas also tends to stabilize the arc, thus mak-
ing it easy to operate. For some applications, howev-
er, the use of helium, or argon-helium blends, is rec-
ommended due to better weld penetration and faster
travel speed. Helium is especially suitable for welding
thick workpieces. The recommended gas flow rates
are shown in table 5.
TABLE 5
Current (A)
50
100
150
200
250
300

AC TIG WELDING QUICK START UP

WARNING
• Following the installation of input
power by a QUALIFIED ELECTRI-
CIAN, make sure the power source
is turned off at switch on rear panel.
------------------------------------------------------------------------
Connect the shielding gas – argon – using a appropri-
ate regulator. Connect the foot amptrol, torch and
work lead to the power source.
With the work cable connected to a properly grounded
work piece, turn the power source on.
The Invertec V205 T AC/DC TIG is ready to AC TIG
weld with the following features:
• AC TIG
• Trigger Mode in 2 step mode
• Local control
• Pulser off
• AC Square Wave
• AC Balance 65% EN
• AC Frequency 100HZ
• Pre Flow .5sec.
• Post Flow 5 sec.
• High Freq Start
OPERATION
Helium cfh-(l/min)
29 - 14
29 - 14
42 - 20
42 - 20
53 - 25
53 - 25
V205-T AC/DC TIG
Change from Local to Remote control by pushing front
panel push button.
Set the maximum output current desired using the
Output Control. Initiate the arc by closing the arc start
switch. The Amptrol will control the output current
from 6 amps to current level set by Output Control.
To change the AC Frequency, press and hold the
Parameter button for 3 seconds. The AC Frequency is
now selected and can be varied by the Output
Control. The frequency is displayed on the digital
meter. After about 5 seconds, the power source will
switch back to the welding mode ready to weld with
the new selected AC Frequency.
To change the AC Balance, press and hold the
Parameter button for 3 seconds, AC Frequency is
selected, press the Parameter button again and AC
Balance is selected. Adjust the Output Control for the
desired AC Balance. After about 5 seconds, the power
source will switch back to the welding mode ready to
weld with the new selected AC Balance.
To change the Post Flow time, momentarily push
the Parameter button until the Post Flow indicator light
is on. Adjust the Output control to the desired Post
Flow time as indicated on digital display.
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