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Ultimately, I need to continually read the voltage while the cutter is cutting so I can implement a Torch Height Control on my DIY CNC machine. I'm getting much closer to completing a circuit design...

Can I connect a multimeter to the torch lead port and clamp port on the plasma cutter to read the voltage? Is there a danger to the plasma cutter by connecting a multimeter this way?

Jim, thank you for the fantastic information.

You mentioned not measuring voltage till the high frequency start has finished and a steady arc has been established. I'm not aware of a method for...

Thank you for the response!

Should any extra consideration be given if the Plasma Cutter is a High Frequency pilot design?

Looking for a diagram to measure voltage from the torch to the ground. I know I need to drop the voltage to a range of 0.0v-5.0v for a microprocessor.