ProTIG 500 AC/DC
Operating Manual
Page 32
In AC process the following parameters can be set:
Pulse main current Ip: 10 – 500A (corresponds main current I1)
Pulse base current Ib: 5 – 500A
Time pulse current:
0.1 – 1.00s (10Hz – 1Hz)
Time base current Tb: 0.1 – 1.00s (10Hz – 1Hz)
8. Rotating knob
With the knob all the parameters and values of the machine can be set.
9. VRD – look chapter 21
10. Frequency / Balance / Amplitude (only for AC machines in welding process AC (LED 20)
By tapping on the button Frequenz/Balance (item 10),
it is possible to switch between the frequency, balance and
Amplitude. The corresponding LED lights.
Frequency 20Hz to 250Hz (LED 100):
Continuously adjustable in the AC process.
A higher frequency results in a more stable arc, especially suitable for thin metal sheets.
Balance -40 to +15 (LED 101 is flashing):
Continuously adjustable in the AC process.
This parameter permits to adjust the positive-to-negative half-wave time ratio. In zero position, the positive
half-wave is as high as the negative. This timing of half-waves allows to adjust penetration depth, power
load, thermal load on the electrode and the purifying effect to the specific welding task.
Rising the negative half-wave (number less 0) causes
−
deeper penetration, narrow weld seam
−
higher electric loading capacity of electrode
−
lower thermal load on tungsten electrode
−
lower purifying effect
Rising the positive half-wave (number greater then 0) causes
−
less deep penetration, broader weld-seam
−
lower electric loading capacity of electrode
−
higher thermal load on tungsten electrode
−
better purifying effect
Amplitude -50 to +20 (LED 102):
Continuously adjustable in the AC process.
This parameter sets the amplitude of the positive and negative half-wave.
In zero position, both amplitudes are equal. The default value is -15%.
Example: Current 100A - Amplitude -20%
Positive half-wave 80A - negative half-wave 120A
10 - Frequence / Balance / Amplitude
100 - Frequence at AC
101 - Balance at AC
102 - Amplitude at AC
