Fronius TransSteel 2700c, Руководство по эксплуатации

Страница: 90 / 120

Measuring welding circuit resistance r
General Measuring the welding circuit resistance makes it possible to have a consistent welding
result 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 weld-
ing 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:
-
If the length or cross-sectional area of the hosepack has changed, measure the
welding circuit resistance again
- Measure the welding circuit resistance for every welding process separately with the
appropriate welding power-leads
Measuring weld-
ing circuit resist-
ance (MIG/MAG
welding)
NOTE!
Risk of incorrect measurement of the welding circuit resistance.
This may negatively affect the welding result.
▶
Ensure that the workpiece in the area of the earthing clamp provides an optimal con-
tact surface (cleaned surface, free from rust, etc.).
1
Ensure that the MANUAL or SYNERGIC process has been selected
2
Establish a grounding (earthing) connection to the workpiece
3
Access the Level 2 (2nd) Setup menu
4
Select parameter "r"
5
Remove the gas nozzle from the welding torch
6
Screw on the contact tip
7
Make sure the wire electrode does not protrude from the contact tip
NOTE!
Risk of incorrect measurement of the welding circuit resistance.
This may negatively affect the welding result.
▶
Ensure that the workpiece provides an optimal contact surface for the contact tip
(cleaned surface, free from rust, etc.).
8
Place the contact tip flush against the workpiece surface
9
Press the torch trigger briefly
-
The welding circuit resistance is calculated. "run" is shown on the display during
the measurement
The measurement is finished when the welding circuit resistance is shown on the display
in mOhm ( for example, 11.4).
90