Which THCAD to use for Plasma cutter without voltage divider

Thanks, sounds like a good way to go

I've ordered the Mesa 7i96 and THCAD-10 so am now definitely going down this route.

I've done some basic reading on voltage divider circuits and from what I can see if I use 2 resistors of same value I will halve the voltage but will need to reduce it a lot more to get down to the 10v max range. Can anyone direct me to a voltage divider circuit diagram suitable for converting raw arc voltage to a suitable range for THCAD-10. My first step will be to see what raw arc voltage my machine has when cutting.

I use a THCAD-10 with two 1MΩ resistors, one in each leg.

That gives a full scale reading of 210V and a divider ratio of 21:1

linuxcnc.org/docs/devel/html/plasma/qtpl...c.html#qt_mesa-thcad

Thanks, tommylight gave me the same advice, I was just confused as it didn't seem to match with what I'd found on voltage divider calculator.

The 7I96 can have up to 4 hardware MPG counters, but each MPG steals 2 pins from
the 7I96's 11 inputs

Stupid question, If someone had a THCAD 300 and later realised there Cutmatic 45 (WIAs version of the Razor Cut 45) was a pilot arc and was having trouble finding the inverter output, could the add a resistor to each leg of a near 1M value and use it as a THCAD 10?