Ohmic probe aborts immediately

> Sometimes stuff shifts mechanically

I verified that the PCB is working as expected. No welded contacts, etc.

> Is the PC you use to control the machine "frozen in time" (not connected to the internet or outside world)

It is connected to the internet, but there are no automatic updates happening. The software hasn't changed in at least 6 months. I also haven't touched the relevant HAL sections in as long.

> 2. Where are the videos ?

Coming soon. Our 4G cell service and broadband internet went down for nearly a day

At long last, here it is:

The OHMIC TEST button does not move the Z axis.  The intent is to see if there is a short between the torch tip and the ohmic lead (a ball of oxide can do this, or water from a water table).

User Manual Explanation of OHMIC TEST

If you do have a short, or you create a short to test it, you also need to hold the button to get the OHMIC light to light up in the GUI as there is sometimes a delay.  The click you are doing is far too fast.  

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.

The original intent from the contributing user islander261 was that ohmic test was used before starting a cut to check there was no rubbish in the nozzle that could cause an issue. I only ever found a bit of slag in the tip once, but this test saw it.