QtPlasmaC and pncconf with "fake" ohmic probe and arc ok

I'm working to create a fiber laser control system with LinuxCNC, and have gotten to the point where I'm ready to try using QtPlasmaC as a fiber laser control system. I've got the base machine working, including a capacitive sensor that I've described in another thread. I'm using a Mesa 7i92 card and pncconf to configure the base machine. It seems like the default method of choosing ohmic probe and arc OK inputs is by picking I/O pins off the Mesa card. However, in a fiber laser config I think I can just always consider arc OK to be true, and I can simulate an ohmic probe in software using the comp hal component like so in custom.hal:

and I can do a similar fake "arc ok" by configuring a not component.

However, it seems like I need to pick a ohmic probe pin in the Mesa card configuration in order to enable the ohmic probe capability. Looking through the config files there are some new ones that I am not familiar with for QtPlasmaC. My question is:

How can I enable ohmic probing and use a software-based ohmic probe when using pncconf to configure my machine? I am using LinuxCNC 2.9.2.

Thanks!

Scott

Probably worth adding that the "fake" ohmic probe works because when the laser head touches the workpiece, the capacitive sensor values change so much that the condition can easily be detected. So the capacitive sensor really does act like an analog ohmic sensor in a way.

It's a capacitive sensor that outputs frequency depending on the head/lens distance, and I'm definitely planning on using that for THC. I think I should also be able to use it for ohmic probing though, I just don't understand all of the moving parts to do that with a QtPlasmaC pncconf-generated configuration.

I'm happy to build a script to replace values or whatever I need to do, but there are new config files with QtPlasmaC so I for instance I don't know how to enable ohmic probing without specifying a Mesa pin as the ohmic probe input, which I don't need (or want) since I can do ohmic probing "in software" using a comp component and the capacitive sensor input.

Thanks!

So is the simplest way to configure an actual Mesa input pin to be an ohmic input and then either fix the generated config via something like sed or unlink the 7i92 input pin and net in the comp output I want to actually control the ohmic input? The debounce might still be useful since the encoder input I'm using to make a synthetic "ohmic" probe is from a physical process that could have some bounce. When I grepped through the config it seemed like there were moving parts to enable ohmic probing in general in other config files that this approach would make sure are set up properly. If this is the case its not the cleanest approach, but for now I have plenty of I/O on the 7i92 to burn.

and then for an "arc OK" that is always ok do something similar?

Thanks!

Thanks, I'll try this this week and report back.

Just repprting back that plasmac:arc-ok-in and plasmac:ohmic-probe worked great to resolve this issue. Thanks!