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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 Konfiguration
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Switch on the welding machine.
•
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 do so, switch the wire feeder using the appropriate
interface.
3 Alignment/Measurement
•
Press the "D" push-button
•
Place the welding torch contact tip on a cleansed part of the workpiece with light pressure and press
the inching button at the torch or wire feeder for approx. 2 seconds; this function can also be selected
via the interface. Short-circuit current flows 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 any further confirmation. If "no Con." is shown on the display, 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: 16.11.2015
© 2015 Subject to alteration!
Aligning the cable resistance
Art. Nr.: 099-MM03LW-EW520
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