Section 14 Tutorials 90
06 Controlling an ‘Air over Oil’ system
An ‘Air over Oil’ system (also referred to as OHMA) uses compressed air to open and close the electrodes plus a
hydraulic intensifier to apply the weld force. This type of system can easily be controlled by the iPAK2 by making
use of the programmable AUX valves feature.
1. Connect the air solenoid (ADVANCE) to the AV1(SV1) output (or whichever output you have
programmed to provide the WAV function).
2. Connect the hydraulic solenoid (INTENSIFY) to the AV2(SV2) output (or whichever AUX output you
wish to use).
3. In your welding schedule(s), set the Presqueeze time to suit the gun closure, and the Squeeze time to
apply the force pre-weld. Now program the AUX valve chosen in step 2 to come on during all of the
intervals which you are using (e.g. Squeeze, Main heat, Hold).
START
ADVANCE
INTENSIFY
CURRENT
Presqueeze Squeeze Mainheat Hold
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