Measuring The Welding Circuit Resistance R; General; Measuring The Welding Circuit Resistance (Mig/Mag Welding) - Fronius TransSteel 4000 Pulse Operating Instructions Manual

Measuring the Welding Circuit Resistance r

General

Measuring the welding circuit resistance makes it possible to have a constant welding re-
sult at all times, even with hosepacks of different lengths. The welding voltage at the arc is
then always precisely regulated, regardless of the length and cross-sectional area of the
hosepack. The use of arc length correction is no longer required.
The calculated welding circuit resistance is shown on the display.
r = welding circuit resistance in milliohm (mOhm)
If the welding circuit resistance has been measured correctly, the set welding voltage will
correspond exactly to the welding voltage at the arc. If you manually measure the voltage
on the output jacks of the power source, this voltage will be higher than the welding voltage
at the arc - that is, higher by the same amount as the voltage drop of the hosepack.
The welding circuit resistance depends on the hosepack used:
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-
Measuring the
welding circuit re-
sistance (MIG/
Incorrect measurement of the welding circuit resistance can have a negative effect
MAG welding)
on the welding result.
► Ensure that the workpiece has an optimum contact surface in the area of the earthing
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2
3
4
5
6
7
Incorrect measurement of the welding circuit resistance can have a negative effect
on the welding result.
► Ensure that the workpiece has an optimum contact surface for the contact tip (clean
8
9
96
If the length or cross-sectional area of the hosepack has changed, measure the weld-
ing circuit resistance again
Measure the welding circuit resistance for every welding process separately with the
appropriate welding power-leads
NOTE!
clamp (clean surface, no rust, etc.).
Make sure that one of the MANUAL / STD SYNERGIC / pulsed synergic welding pro-
cesses is selected
Establish a ground earth connection to the workpiece
Access the Setup menu 2nd level (2nd)
Select parameter "r"
Remove the gas nozzle from the welding torch
Screw on the contact tip
Ensure that the wire electrode does not protrude from the contact tip
NOTE!
surface, no rust, etc.).
Place the contact tip flush against the workpiece surface
Press the torch trigger briefly
The welding circuit resistance is calculated. "run" is shown on the display during
-
the measurement