REHM TIGER DIGITAL 180 AC/DC ULTRA, Руководство по эксплуатации

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Function description
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5.4 Corner menu welding process
(bottom right)
The corner menu welding process [
BF4 ] is used to select:

Time pulses

Hyper-Pulsen®

Pulse off
5.4.1 Time pulses
Pulses with pulse times from 0.5 to 5.0 seconds
The setting of the I1-pulse time t1 and the I2-pulse time t2 determines the
duration that current I1 or current I2 remains active until switching to the other
current. Both pulse times can be set independently of each other.
The times and welding current peaks should be matched so that the base
material is melted during the high current phase and solidified during the low
current phase. In difficult situations (particularly in out of position welding and
large gap bridging) and with thin sheet welding TIG pulse welding enables the
weld pool to be controlled better than with constant welding current.
5.4.2 Hyper pulses
Pulses with a pulse frequency of 10 Hz to 15 kHz.
The flow of the welding current is the same as conventional pulsing. However,
the periods during which current I1 and I2 are active are always the same. As
this period is very small a description with pulse frequency is expedient and
customary.
The following correlations apply for the conversion of the pulse frequency for the
each of pulse time t1 and t2:
Total pulse time = I1 pulse time t1 + I2-pulse time t2 = 1 / pulse frequency
I1 pulse time t1 = I2-pulse time t2 = 0.5 * total pulse time
Example:
Pulse frequency = 50 Hz
Total pulse time = I1 pulse time t1 + I2-pulse time t2
= 1 / 50 Hz = 20 ms =
0.02 s
I1-pulse time t1 = 0.5 * total pulse time = 0.01s
I2-pulse time t2 = 0.5 * total pulse time = 0.01s
This means that the current when welding has the value current I1 for 0.01 s (=
10 ms), then for 0.01 s (= 10 ms) the value current I2, then once again for 0.01 s
(= 10 ms) the value current I1, etc.
Pulses of such short duration bring about a more narrow and concentrated arc
and deeper penetration.