Welding Current I - Rehm Invertig.pro Compact 240 Dc Betriebsanleitung

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controllable than with constant welding current in difficult situations (particularly,
in difficult positions and when bridging large gaps) and when welding thin
materials.
High-frequency pulses: With pulse frequencies from 10 Hz to 15 kHz
The procedure of welding current corresponds to conventional pulsing. However
the time periods for which the currents I
same. Since these time periods are very small, an identification with pulse
frequency is sensible and normal.
For the conversion to pulse frequency in the various pulse times t
following relationships are valid:
Overall pulse time = I
I pulse time t = I
1 1
Example:
Pulse frequency = 50 Hz
Overall pulse time = I -pulse time t
1
I -pulse time t = 0.5 * Overall pulse time = 0.01s
1 1
I -pulse time t = 0.5 * Overall pulse time = 0.01s
2 2
This means that the current during welding has the value of current I1 for 0.01
seconds (=10 ms) than it has the value of current l
and then it goes back to the value for current l
Pulsing with such short times results in a slimmer arc and a deeper penetration.
Due to the very quick changes, the digital display always shows the average
value. Thus, with a welding current l
3.5.8

Welding current I

Setting of the welding current I
The use of welding current I
displayed when TIG welding. Welding current I
Chapter 3.5.7) and for dual current regulation:
Dual current regulation:
General functional operation:
The dual current regulation makes it possible for the user to use a 2 button torch
with 2 different pre-set currents. This allows you to switch between the two
values I and I . The switch is performed by pressing torch button 2. Examples of
1 2
switches:
The changeover to I2 takes place for as long as torch button 2 is pressed. When
torch button 2 is released, a changeover to I1 occurs immediately
 From high current to low or vice versa, for example, when changing the
welding position.
 Manual pulsing (see Chapter 3.5.10)
 Starting with high current I1 to warm the work piece, then welding with the
lower current I .
2
 Starting with low current I
current I .
2
Switching is possible in 2-step and 4-step operation without pulsing.
The following ranges can be set in accordance with the welding current I
and I
1
-pulse time t + I -pulse time t
1 1 2
pulse time t
2 2
+ I -pulse time t
1 2
1
= 100A and l2 = 50 A, 75 A is displayed.
1
2
[9] is carried out as described in Chapter 3.5.1.
2
only makes sense for TIG welding and is thus only
2
at work piece edges, then welding with the higher
1
Functional description
are each active are always the
2
1
= 1/ pulse frequency
2
= 0.5 * Overall pulse time
= 1/50 Hz = 20 ms = 0.02 s
2
for 0.01 seconds (=10 ms),
2
for 0.01 seconds (=10 ms) etc.
is used when pulsing (see
2
and t the
2
:
1