Section 14 Tutorials 84
Hi-lift -
A pulse on the Retract Input causes the High Lift Air Valve to switch off and close the electrodes to the
mid position. Welding can proceed in this case.
Whilst the High Lift Air Valve is off, a pulse on the Retract Input causes the valve to switch on and the
electrodes go to the fully open position. Welding will not proceed in this case.
Maintained
When the Retract Input is switched on, the High Lift Air Valve switches on and the electrodes close to
the mid position. Welding can proceed in this case.
When the Retract Input is switched off, the High Lift Air Valve switches off and the electrodes open fully.
Welding will not proceed in this case.
Retract input
HAV output
Start input
WAV output
Retract input
HAV output
Start input
WAV output
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