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I'm afraid ChatGPT will just be a time-sink here.

I suspect the easiest current path would be to make a pncconf  QTPlasmac/THCAD configuration
for a 7I95T (This requires updating to the very latest LinuxCNC master as 7I95T support was just added
about 1 week ago) This configuration will match as far as encoders, inputs, and outputs go (though will show
more inputs than the 7I97T has, so just don't use any inputs beyond input 15)

When creating the 7I95T configuration, setup step/dir axis.  and encoder feedback. This will create the
basic PID loop structure  required for changing over to the 7I97T PWM/analog axis configuration.

When this is done, you will have a step/dir configuration for a 7I95T and QTPlasmac/THCAD.
Next you will need to change the card name in the ini file to "7i97".

then the created hal file will need to be edited to change the PID feedback input from stepgen
position to encoder position and the PID output from stepgen velocity to PWM value.

There are also enables and some PWM setup needed. I can help with these when you get a basic
hal file setup. 

You can use this example of basic 7I97/7I97T PWM hal file setup:

 



 

Thank you, the wiring is making much more sense and less challenging now.  

Im using linuxcnc_2.9.4-amd64.hybrid.iso that I downloaded here.  It installed qtplasmac 2.9.  Is it recommended to install 2.10?

What is the easiest way to configure a 7i97t and a couple thcad2 for plasma?  I dont see 7i97t as an option in pncconf and in mesact there isnt an option for qtplasmac.

I asked chatgpt to create a quick ini for qtplasmac and a 7i97t and it came up with this pretty quick:
 

Si la resistencia es de 2,4 Mohm la medi para asegurar pero si le doy la vuelta a los cables del multimetro me da -145V en negativos 

todos esos valores son cortando el material 

If the external resistor value is correct (2.4M) that's not
possible. It may be that there is enough RFI/EMI that
the voltmeter is malfunctioning.

Ahora otra pregunta yo mido con un multimetro la salida del plasma la que va al thc lo mido en DC y me da mas de 600V que es en maximo de mi multimetro asi que no se cuanto exactamente, tengo una resistencia de 2,4 mohm en serie en el “negativo” si mido después de la resistencia me da 104V.

Que tengo que hacer?

Locales must be set to UTF-8 for LinuxCNC to work properly, be it for wizards or for some of the GUI's.
Probably should be mentioned in the docs, preferably at the very beginning, but not much of an issue from what i read on this forum.
Google "setting locale utf-8 debian", quite easy to do.
Hard to know if it works always for all the languages included.

Era el idioma muchísimas gracias por fin se solucionó 

Good catch. I just saw the 0 on the encoder port and assumed it was the same issue. I don't know about the translations either...I tried to take a quick look at the source but it immediately became clear I don't have enough understanding of it for it to be quick. Hopefully snowgoer540 can provide some guidance.

I don't think there is a pin 0 issue as this is a 7I96s and the encoder is on pins
27,28,29

Language may be the issue, I don't know enough about locales and translations
but do all strings in the source get translated? (en_US):

                    if "Arc Voltage" in pinchanged:
                        self.d._arcvpin = pin
                    elif self.d._arcvpin == pin:
                        self.d._arcvpin = None
                    if self.d._arcvpin and self.d.frontend == _PD._QTPLASMAC:
                        self.p.page_set_state('thcad', True)
                    else:

 

Hi, I had the same issue and there was a problem with pncconf displaying the THCAD page if the pin number was 0.  I made a pull request that has been merged a couple of days ago into 2.10 master.  You could either use an input that doesn't have a pin number of 0 or upgrade to the 2.10 master.

Hope this helps.

The THCAD support was added to pncconf about 3 years ago so definitely in 2.9.4

The THCAD screen should appear on the next screen after the one where
you set the stepgen/encoder functions.

he vuelto a instalar linuxcnc ultima version estable y nada sigue sin darme la option del thc
porque¿

Si

I'm using 2.9.4

Did you select "Arc Voltage" on the encoder menu on the TB1/TB2 tab?
 

Me podrías decir por favor que versión de Linux CNC tienes y si esta en Debian 12 o si no en cual y vuelvo a instalarlo todo a ver si me funciona gracias