THC Voltage Reading with a Non HF plasma

Hi to all
I am newbie on the plasma CNC world and I am really desperate.
Las week I finally finish to integrate my first DIY plasma table (4ftx8ft) everything has been configured and debug on dry cycle. I am using sheetcam and Mach3 full license both,Everything with Gecko G540.

My problem is that I am using a Lotos Ltp5500D plasma NON HF and pilot arc, without voltage divider, so my THC is not reading the voltage when the arc start, I am using raw voltage. Using voltmeter the reading is 119 +/-5V but the THC send error and is not reading the voltage any suggestion??

I wish you luck, but my experience with a Lotos plasma cutter was pretty disappointing. I simply could not get the interference levels low enough that the plasma cutter didn't knock the computer signal out when it fired. I tried a number of options to mitigate the issue but nothing worked for me. I didn't have your exact model so maybe you will have better luck! Someone here may be able to offer assistance, but at the least they need more info... thc type/model, how it's connected now etc etc. I did a little searching and there is some info out there on how this model is connected. There is also some info in the manual. Good luck.

Why is this on the PlasmaCAM forum?