CARBONE TIG160PDCHF, Operator'S Manual, Page: 23 / 38

B-9 OPERATION B-9
DC TIG WELDING QUICK START UP
ELECTRIC SHOCK can kill.
. Have an electrician install
and service this equipment.
. Turn the input power off at
the fuse box, disconnect or
unplug supply lines and allow machine
to sit for five minutes minimum to allow
the power capacitors to discharge before
working inside this equipment.
. Do not touch electrically hot parts.
Connect up the shielding gas
–
typically argon
–
using an appropriate regulator. Connect Adjustable
foot control
, torch and work lead to power source.
With the Work cable connected to a properly
grounded work piece, turn the power source on.
To change to DC TIG Welding:
. Press Mode button to select "DC TIG."
. Press Local / Remote Mode button and set for
Remote.
Set the maximum output current desired using the
Output Control.
Initiate the arc by closing the
Adjustable foot
control s arc start switch. The Adjustable foot
control
will control the output current from 10 amps
to current level set by output control.
To change the Post Flow time, repeatedly 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.
REMOTE CONTROL OPERATION
A
Adjustable foot control(
optional) is included
with the PRECISION TIG models and available for
other models (See Accessories Section) for remote
current control while TIG welding. An Arc Start
Switch may be used to start and stop the welding if
no remote control of the current is desired. Refer to
the Accessories Section of this manual.
Both the Hand and
Adjustable foot control work in
a similar manner. For simplicity, the following
explanation will refer only to "Ampcontrol", meaning
both Foot and Hand models. The term "minimum"
refers to a foot pedal in the "up" position, as it would
be with no foot pressure, or a Hand Ampcontrol in
the relaxed position, with no thumb pressure.
"Maximum" refers to a fully depressed Foot
Ampcontrol,or a fully extended Hand Ampcontrol.
When the welder is in TIG modes activating the
Ampcontrol energizes the electrode terminal and
varies the output welding current from its minimum
value of 5 Amp (DC) , to the maximum value set
by the Current Control on the control panel. This
helps eliminate accidental high current damage to
the work piece and/or tungsten, and provides a fine
control of the current. When the welder is in the
stick mode a remote control has no effect and is not
used.
It is important to note that, in some cases, the
tungsten will not start an arc at the minimum current
because the tungsten may be too large or cold. To
start an arc reliably, it is important to depress the
Ampcontrol far enough so that the machine output
current is near the tungsten operating range. For
example, a 3/32" tungsten may be used on DC- to
weld over the full range of the machine.
To start the arc, the operator may have to turn the
cur-rent control up and depress the Ampcontrol
approximately 1/4 of the way down. Depressing the
Ampcontrol to its minimum position may not start
the arc. Also if the current control is set too low, the
arc may not start. In most cases, a large or cold
tungsten will not readily establish an arc at low
currents. This is normal. In Direct Current mode the
PRECISION TIG will start a 3/32", 2% thoriated
tungsten electrode at 20 amperes provided the
electrode tip is properly grounded and not
contaminated.