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The resistance value of cables can either be set directly or it can be aligned using the power source. The
factory setting of the power sources is 8 mΩ. This value correponds to a 5 m earth cable, a 1.5 m
intermediate hose package and a 3 m water-cooled welding torch. With other hose package lengths, it is
necessary to carry out a +/- voltage correction to optimise welding properties. The voltage correction
value can be set close to zero by means of realigning the cable resistance. It is recommended to align the
electric cable resistance after replacing accessories such as torches or intermediate hose packages.
In case a second wire feeder is used the (rL2) parameter has to be aligned. For all other configurations it
is sufficient to align the (rL1) parameter.
1 Preparation
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Switch off the welding machine.
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Unscrew the gas nozzle from the welding torch.
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Trim the welding wire so that it is flush with the contact tip.
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Retract the welding wire a little (approx. 50 mm) on the wire feeder. There should now be no more
welding wire in the contact tip.
2 Configuration
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Switch on the welding machine.
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Press the "System" push-button.
•
Select the "Cable resistance alignment" parameter using the main control button. Parameter RL1 must
be aligned for all machine combinations. In case of welding systems with a second power circuit – if
two wire feeders are to be operated from a single power source, for example – a second alignment
with parameter RL2 must be performed. To activate the required wire feeder for measurement briefly
activate (tap) the torch trigger of this machine.
3 Alignment/Measurement
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Press the "D" push-button.
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Applying slight pressure, put the welding torch with the contact tip against a clean, purged location on
the workpiece and then press the torch trigger for approx. 2 seconds. A short-circuit current will flow
briefly, which is used to determine and display the cable resistance. The value can be between 0 mΩ
and 40 mΩ. The new value is immediately saved without requiring further confirmation. If no value is
shown on the display, then measurement failed. The measurement must be repeated.
•
Press the "A" push-button once the measurement has been successful.
4 Restoring welding standby mode
•
Switch off the welding machine.
•
Screw the gas nozzle onto the welding torch.
•
Switch on the welding machine
•
Insert the welding wire.
Page: 2/2
Date: 13.11.2015
© 2015 Subject to alteration
Aligning the cable resistance
Art. Nr.: 099-MM02LW-EW520
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