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Section 3
EXAMPLE: AC EP (+) BALANCE
1 Hz (one full AC cycle)
EN 50%
50%
Standard transformer welder balance: 50% EN/EP
Balling tungsten, light penetration, wide cleaning area.
EP 65%
EN 35%
50%
Extreme cleaning setting. 65% EP:
Shallow penetration, balling tungsten, excessive cleaning area.
50%
EN 65%
Good penetration setting 35% EP:
Deeper penetration, sharper tungsten, narrow cleaning area.
NOTE:
1.
Due to the rapid switching of the inverter, High
Frequency (HF) is not needed except to start the
arc. The HF TIG feature only refers to the initial arc
start, and can be used for DC as well. In a trans-
former welder, the HF can be switched to continu-
ous to stabilize the AC arc. However, this is not
needed in an inverter. Therefore, HF refers only to
the initiation of the arc, and not to AC operation.
However to reduce tungsten contamination with
aluminum, you should only operate the AC mode
with the HF start selected unless it is absolutely
necessary to welding restrictions. Lift start is recom-
mended only for DC, or for AC when a copper
scratch block is used and the arc is transferred. Lift
start would be used in areas that are sensitive to
electronic interference such as hospitals or around-
computerized equimpment such as CNC.
2.
The addition of Helium to Argon can increase the
welding capacity of the welder and alter the amount
of cleaning typically needed. Do not exceed 25%
however or arc starts will be difficult and erratic.
3.
If arc wandering in AC is a problem, reduce cleaning
percent. If it continues, reduce gas flow and then
check for drafts or for poor work clamp connection.
Also check for highly oxidized or dirty aluminum or a
faulty work clamp or connection. Try relocating
work clamp directly to the metal being welded.
4.
AC controls only apply to AC operation, and do not
affect the settings on DC.
5.
Too slow of travel speed will increase the etch-
ing/cleaning area even if AC balance is turned low.
EP 50%
EP 35%
Basic theory and function
Parameter Notes:
25
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