Category: Plasmac
Ouch. I swear I knew that before. Thanks a lot for your reply.
For anyone else that stumbles on this, here is what I added to my personal operations manual:
Q: Ohmic sensing is triggered early
A: This is most often caused by slag or water getting into the shield.
With the torch shield away from anything conductive, tap the ohmic test button. If the Ohmic light comes on then the ohmic sense circuit is shorted. If you are doing test cuts on scrap, tap the Torch Pulse button to blow out any water in the shield. If that doesn't work, turn off plasma cutter and blow the tip with compressed air. If this does not work, remove shield and clean out any debris. Look for slag that is stuck to the electrode and/or shield cup.
In the case of slag, consider increasing pierce height as this almost always happens during pierce. In the case of water, add G0 to your program to rapidly move the torch away from water being sprayed by the a torch during postflow.
