Design and function
Arc ignition
40
099-008724-EW501
08.01.2012
5.13
Arc ignition
The pilot arc is switched on and off using the pilot arc button „On/Off“.
After switching on the pilot arc, the gas pre-flow time set starts running, the pilot arc current ignites
without workpiece contact between the electrode and nozzle, and the control lamp in the pressure switch
comes on.
CAUTION
Oxidation of the tungsten electrode!
To protect the tungsten electrode against oxidation carry out the following actions
before switching off the power source:
• Switch off the pilot arc and wait for the gas post flow time to elapse!
• Do not switch off the machine while the arc is still burning!
NOTE
On delivery, the Hilibo current on the machine is preset to 10A.
The majority of applications are covered by this current setting.
If required, the Hilibo current can be adjusted individually using the PC300.NET
software (5A to 80A).
Please note the relevant documentation of the accessory components.
5.13.1
TIG automatic cut-out
NOTE
The automatic cut-out function will be triggered by two conditions during the welding
process:
During the ignition phase (ignition fault)
• If there is no welding current within 3s after starting the welding.
During the welding phase (arc interruption)
• If the arc is interrupted for longer than 3s.
In both cases, the welding machine ends the ignition or welding process immediately.
5.14
Protecting welding parameters from unauthorised access
To protect against unauthorised or unintentional adjustment of the welding parameters on the machine,
the control input can be locked with the aid of a key switch.
Key position 1 =
All parameters can be set
Key position 0 =
Only the following operating elements are functional:
• “Operating mode” button
• “Welding parameter setting” rotary transducer
• “Display
switching”
button
• “TIG pulse welding”/“Select activArc” button
• “Select welding parameters” button
• “Gas test” button
