Zavarivanje Ltd.
User Manual: WALTER TIG2000
page 12 of 24
Duty Cycle (10% - 90%) – menu 8:
DC PULSED WELDING
– Defines the percentage of time period the
welding current output would be equal to main current, in relation to the time
the output would be background current (Imin). One period of DC pulsed
current is equal to 1/Freq.
Example: Duty Cycle=30% means that during one period of DC pulsed
welding, for 30% of the time the welding output would be the main welding
current, and 70% of the time period, the output would be back current Imin.
For the set frequency of 10Hz, the time period would be 1/10s, i.e. 0.1
seconds. In this example, the main current would last 0.03 seconds, and back
current would last 0.07 seconds.
AC Balance: (10% - 90%) – menu 9:
AC Balance
– Defines the percentage of time period the welding current
output would be the
DC+ cleaning current
(as opposed to
DC- welding
current
). The switching between
DC- welding
and
DC+ cleaning
current is
called
AC or alternating current
, which is used to weld materials such as
aluminium, magnesium and its alloys. One period of AC current is equal to
1/Freq. Smaller AC balance gives a narrower welding arc, and bigger AC
balance results in a wider welding arc.
Example: AC Balance=30% means that during one whole period of AC
current, the DC+ cleaning current would be at the welder output for 30% of
the time. The remaining 70% of the AC welding time period would be the DC-
welding current (i.e. the main welding current - Imax). For the set frequency
of 100Hz, the time period of AC welding is 1/100s = 0.01seconds. In this
example the cleaning current would be at the welder output for 0.003seconds,
and the welding current would be at the output for the remaining 0.007seconds
of the AC time period.
