External Hf Unit; Hf Timeout - Cebora ARCO Manual De Instrucciones

4�3�1 HF High-frequency ignition�
The arc is ignited by means of a high frequency/voltage discharge, the discharge stops as soon as welding current
begins to circulate or after a timeout (3s). This type of ignition does not require the workpiece to be touched with
the electrode tip. Unlike contact ignition, with HF ignition, there is no risk of contaminating the workpiece with the
tungsten electrode. Always try to ignite the arc at a maximum distance of 2-3 mm from the workpiece.
CEBORA WinTIG range power sources comply with regulations governing strikers in the welding field. Take care
when working with this type of procedure. Under certain circumstances, HF ignition may involve an electric shock
that is perceptible but not damaging to the operator. To avoid this, wear appropriate equipment and take care not
to work in wet or humid environments.
When using HF ignition mode, another two parameters can be set:
4�3�1�1 External HF Unit
This setting is necessary to allow the power source to operate with an external HF cassette Item 450.00. This remote
ignition unit is used in systems where the torch is over 5 metres long. Using an external ignition unit means that high
frequencies do not need to cover long distances, which would create excessive electromagnetic interference in the
surrounding environment and HF power loss.
4�3�1�2 HF Timeout
This parameter allows HF duration to be changed during ignition. Once the timeout has elapsed, if the welding current
is not circulating in the workpiece, the Start sequence must be repeated in both manual and robotised operating
modes. This setting is useful for minimising interference generated by high frequency when ignition does not take
place.
WARNING
Select Menu -> Accessories -> External HF Unit.
OFF default setting. The external HF unit cannot be
used. The power source's internal HF unit is used for
ignition.
ON the ignition power source internal HF is disabled and
it is necessary to use item 450.00 (External HF unit for
TIG applications).
Select Menu -> Accessories -> HF Timeout
The default setting is 3s.
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