Building a chain driven Plasma table.

Its hard to keep up with QTplasmac;s implementation.
The ohmic3.comp component is a later version I wrote.
You can find it in the components folder in my git
github.com/rodw-au/showstopper
Also, ohmic.hal in this config is a standalone hal file you can load from  your ini file to set it up
Note you may need to increase ohmicsense.ohmic-threshold  depending on your environment (even up to 23.9 volts)

So basically I should restore custom Hal to original. Download ohmic3.comp.
And ohmic.hal.

Into which folder should I paste those files.?
What do I need to do to point to ohmic3.hal I’m my ini file?

So I figured it out.
I installed ohmic3 comp.
Put the Hal file into the config folder of my machine and edited the ini file and added the ohmic Hal file.
Linuxcnc starts now without any error messages.

Probe test works.
But if I press ohmic test nothing happens.

  Is there anything I have to change here?

I found some strange thing happening on my table. In Hal show under ohmic voltage I see an erratic change of voltage. 
Between 2 and 25 volts. 

If I touch the torch with the negative cable from the power supply that is supposed to go to the workpiece I get a stable voltage of about 25 volts. If I put the same cable into the water I also get stable 25 volts.

I just found the cause of the strange voltages. 
it was some dirt that accumulated between the torch nozzle and the Shield. 
after cleaning the voltage dropped drastically. Between 2 and 10 volts. 
after this I put a pull up Resistor between positive in and negative in of the Thad.

that put the fluctuation to below 5 volts 
 Now it looks like ohmic probing works perfectly.