7
It is also possible to adjust the starting amperage. When you
push the remote on button, “rem” is flashing and displayed in
the “Volts” display (#4) and the starting amperage is flashing
and displayed in the “Amps” display (#5). While both displays
are flashing, adjust the amperage adjustment knob (#8) to adjust
the starting amperage. The starting amperage can be set to any
value as long as it is less than the maximum amperage.
When the remote is off, the green light will be off, and the
amperage will be adjusted by the amperage adjustment knob
(#8) on the front of the welder
15. HF ON
Depressing the “HF ON” button so the green light is illuminated
turns the high frequency arc starting on. When the foot pedal
is depressed, a high frequency arc will jump from the tungsten
to the ground, initiating the arc. This makes it very easy to
start the arc. Additionally, in the AC mode, the high frequency
is only used to start the arc, unlike conventional transformer
welders which must have the high frequency on all the time to
maintain the arc.
When the high frequency is off, it is possible to do “lift arc”
starting. The lift arc mode allows you to initiate the welding arc
without high frequency. This is important in any environment
where the high frequency arc will cause interference with
sensitive electrical components or computers. A good example
of this would be stainless steel or aluminum repair in hospitals.
The Lift Arc mode works for both AC and DC welding.
To TIG Weld using the Lift Arc Mode, simply touch the
tungsten to the workpiece, activate the torch trigger or depress
the foot pedal and lift off. When the tungsten breaks contact
with the work, the arc will start. You can also use this method
for Stick welding with the added benefit of being able to vary
your amperage with the foot pedal.
For Lift-Arc in aluminum, please remember the following
pointers to make arc ignition easier:
1. Keep the tungsten in contact with the workpiece for at least
5 seconds before lifting off the work piece.
2. When using remote amperage control, it is advisable to start
the arc at a much higher amperage than the actual welding
amperage. Once the arc has been established, reduce the
amerage to the welding amperage.
3. For Lift Arc at lower amperages, the correct tungsten
(2% Lanthanated) correct diameter, and a correctly ground
tungsten are very important.
4. A higher frequency (200 Hz) and higher balance (90%)
will make it easier to intitiate your arc.
16. AC Balance Knob
The AC Balance Knob lets you adjust the “balance” of the
positive part of the AC wave with respect to the negative part of
the AC wave. When the AC is on, and the “BALANCE” knob
is adjusted, the volts display flashes and becomes the balance
display. Your Invertig 201 allows you to adjust the AC balance
from 10% to 90%, a substantially greater range than is possible
with conventional transformer units (40% to 60%). When the
AC balance is set to 50%, the positive part of the AC wave and
the negative part of the AC wave are equal.
Setting the AC balance to a higher percentage (51 to 90 %)
increases the electrode negative portion of the wave (torch or
tungsten is negative, work piece is positive – the electrons flow
from the torch to the workpiece). This increases penetration,
lengthens the tungsten life, but reduces the cleaning portion of
the wave.
Setting the AC balance to a lower percentage (49 to 10%)
increases the electrode positive portion of the wave (torch or
tungsten is positive, work piece is negative – the electrons flow
from the workpiece to the torch). This increases the amount
of heat that builds up in the torch and shortens tungsten life,
decreases penetration, but increases the cleaning portion of
the wave.
Front Panel Controls
Содержание Invertig 201 AC/DC
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