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© Weldclass 2019 | E.&O.E.
4.5.11
Clean Width Area / AC BALANCE (43)
Adjusts the balance as a percentage between the forward and reverse current cycles when welding in
AC output mode. The reverse part of the AC cycle gives the ‘cleaning’ effect on the weld material, while
the forward cycle melts the weld material. Neutral setting is 0.
Increased reverse cycle bias will give greater cleaning effect, less weld penetration and more heat in the
torch tungsten. This gives the disadvantage of reducing the output current that can be used for a given
tungsten size to prevent the tungsten overheating.
Increased forward cycle bias will give the opposite effect, less cleaning effect, greater weld penetration
and less heat in the tungsten.
Ideally for maximum effectiveness, the clean width/ AC balance should be set with as much forward
cycle bias as possible, while still maintaining a sufficient level of oxidisation removal for a contamination
free weld pool. The cleaner the non-ferrous metal is before welding, the more effective it is to weld.
This effect can also be used to reduce heat in the tungsten, allowing use of a pointed tungsten tip shape
for a more defined arc. See 12.3.1 for more information.
4.6
Remote Controls
4.6.1
Remote Control TIG Torch
The TIG torch supplied with the WF-201T AC/DC machine incorporates a Remote Control Amperage
Potentiometer on the handle (48). This can be used to change the Base/Peak current either before or
during welding.
4.6.1
Remote Foot Control (Optional Accessory)
An optional Foot control is available for use with the WF-201T AC/DC machine. (Part No. WC-06236).
1.
Plug into the Torch Control Interface connection (5) instead of the interface plug on the TIG
torch.
2.
Set the Trigger Mode to 2T (Refer to 4.4)
3.
Set Function to Normal (Refer to 4.3)
On this Foot control the first stage of the foot movement activates the ‘Trigger’ function. You will hear
the foot control ‘click’ at this point.
After this point the rest of the foot movement regulates the Base Current output.
The Adjustment knob on the Foot control calibrates the maximum Base Current (as a portion of the
base current set on the machine) that is represented when the Foot Pedal is right down.
Figure 12
Foot Pedal
Adjustment Knob
Interface cable
