New Project with Mesa 7I96 and THCAD-05

Tom,
I think the settings are correct originally
The way the ohmic3 code is written, it just accepts the raw data as inputs and there is no need to use a calculator that way. 
(We let the computer do the maths)
So the thcad frequencies should be set to the ones on the calibration sticker.
The thcad divider should be set to what is set on the  link on the THCAD board. It should be set to 1/32 so 32 is required here.
Provided the 390 k resistor is used in the ohmic sense circuit, the volt divider should be set to 4.9. This gives a full scale of 24.5 volts.
You need to check the isolated ohmic power supply is outputting 24 volts and adjust the calibration screw to achieve this.

The problem you have is that the ohmic-on output is not connected to the plasmac input. Normally this is done when you configure QTplasmac the first time. Today that is done in pncconf.

So revert the settings to what they were in custom hal and  add this to your main hal file

I think it should work then. I will let Phil chime in if I have got that connection wrong.

I have attached a PDF file with the results of adding the 2 lines from the post above, and some other info that I looked at.  Not sure as to how helpful it is be I am trying to get this wrapped up, it seems so close.
 

The ohmic3.comp should be loaded per the loadrt command in his custom.hal
The ini file shared showed that custom.hal was being loaded.
It should be named ohmicsense by that file.
As with any missing pin, comment the offending line out, and review halshow to check the component is loaded and what the pin name is.

Ohmic3 does not need the ohmic-enable signal

here is the last info you asked for in a Zip file, I hope we can work this out as it seems to be the last huddle.  I do thank you all for your time and knowledge.  I am here to be your eyes and hands on the ground here
 

Just a thought with my limited knowledge it looks to me that this Pncconf may be setup to use a different type of Ohmic sensor. Like a feather touch or other brand, These would use a input signal to the 7I76E board. The Pncconf input pins can be selected for a Ohmic sensor other then the Encoder B.

So the installation of ohmic3.comp was discussed here in this thread here
forum.linuxcnc.org/38-general-linuxcnc-q...-05?start=290#212684
A link was provided to this post where it could be downloaded
forum.linuxcnc.org/plasmac/38848-hyperse...ons?start=210#175839

From what I could see you installed all of this because I would have expected an error about ohmic3.comp not found before the pin was not found.
Can you open halshow then open the pins part of the tree and confirm ohmicsense exists?
If we get that far, can you then open the ohmicsense tree  and share a screen dump of its pins?

 

acourtjester wrote:

Just a thought with my limited knowledge it looks to me that this Pncconf may be setup to use a different type of Ohmic sensor. Like a feather touch or other brand, These would use a input signal to the 7I76E board. The Pncconf input pins can be selected for a Ohmic sensor other then the Encoder B.

Yes, originally Plasmac was using a circuit using relays which is described in the plasma primer here
linuxcnc.org/docs/devel/html/plasma/plas...r.html#ohmic-sensing

Then PCW came up with the idea that became hypersensing with ohmic3.comp

Here  is what you asked for Rod