HTP Invertig 160DC, Owner'S Manual

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6) Post Gas
The post gas flow is adjustable from .3 sec to 20 sec. Post
gas flow is necessary because after the arc is extinguished;
if the gas stopped flowing immediately, there is a possibility
the molten weld puddle would come in contact with the
atmosphere, causing weld defects. Additionally it prevents
the tungsten from becoming contaminated by the
atmosphere. The gas flow should run long enough to allow
the orange color of the tungsten to disappear. It is important
to remember not to remove the TIG torch from the weld until
the post gas cycle has been completed. A good starting
point for the post gas flow is 5.0 sec. If you are welding at
higher amperages or on more critical alloys it may be
necessary to increase the post gas flow to a higher value.
7) Welding Mode Switch
The welding mode switch allows you to select the welding
mode of your Invertig 160DC.
A) Stick Welding – this mode is used when stick
electrode welding. The electrode will always be hot
and the gas solenoid will not operate. The green
“Welding Current” lamp will be illuminated
indicating the welding current is on.
B) TIG 2T Mode – With the torch trigger or foot pedal
depressed, your Invertig 160DC will start the arc.
When the trigger is released, the unit will stop.
Select this welding mode for operation with the foot
pedal or the torch mounted amperage control.
This will generally be the most common mode
of operation.
C) TIG 4T Mode – This is like a lock on trigger on a
drill or grinder. This mode is generally used with a
TIG torch which has a trigger to start and stop the
arc. It is generally not used with a foot pedal or a
torch mounted amperage control.
When you depress the trigger on the torch, your
Invertig 160DC provides pre-gas flow for as long as
the trigger is depressed. When the trigger is released,
it will slope up to the welding amperage that has been
selected. When the trigger is depressed again, the
welding current will slope down to the final current. As
long as the trigger is depressed, your Invertig 160DC
will continue to weld at the final current which has been
selected. When the trigger is released, the arc will
extinguish, and the post flow will start.
We do not recommend using the 4t mode with
either the foot pedal or the torch mounted amperage
control.
D) TIG SPOT – the spot welding mode allows you to
weld for between 0.3 and 6 seconds and then the
unit will automatically stop. This would be a good
selection if you were performing a series of repetitive
tack welds.
E) Program Mode – using a TIG torch which has
a trigger switch, the program mode allows you to
switch between 2 programmed welding amperages.
For example, lets say you have your welding current
set at 150 amps, and your “FINAL CURRENT” set
at 50% or 75 amps. Depress the trigger and you
have pre-gas flow for as long as you keep the trigger
depressed. Release the trigger and your TIG 160DC
will begin to weld at 150 amps. Depress and release
the trigger and you will go to your final current of
75 amps. Depress and release the trigger again and
you will go back to 150 amps. To stop welding,
depress the trigger for 5 seconds or longer. When
the trigger is released the arc is extinguished and the
machine will go into post gas flow.
8) Amperage Adjustment Knob
This knob determines the welding amperage. The amperage
on your Invertig 160DC can be adjusted from 5 to 160 amps.
When using a remote amperage control, the amperage
adjustment knob is used to select the maximum amperage
for your particular welding application. For example, when
welding .060" mild steel, I adjusted the amperage knob to
80 amps. This is about 20% more power than I need for
welding the .060" steel. I made sure the local/remote switch
(#9) was set to remote. If I were to depress the foot pedal
completely, the maximum amperage would now be 80 amps.
Setting the machine so the maximum amperage is 80 amps
vs. the maximum output of the machine of 160 amps, the
pedal becomes less sensitive. More of a movement in the
pedal results in a smaller variance of the amperage, making
it easier to control the heat and therefore easier to control
your puddle.
9) Remote/Local Switch
When the remote/local switch is set to remote, the amperage
is infinitely adjustable by either the foot pedal or the torch
mounted amperage control.
It is possible to limit the maximum amperage of your
Invertig 160DC. To limit the maximum amperage of the
machine to 100 amps, for example, with the foot pedal
plugged in or torch mounted amperage control plugged into
the 5-pin connection, simply set the amperage adjustment