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Alright, well now that we have our terms clear, I will say I am connecting the negative terminal on the plasma cutter to common on the motor. But regardless of terminology, that should theoretically...

Err..... Jim, I don't think we are understanding each other. I understand how a THC works and as stated before, I have already connected a DVM many times. When you connect a DVM, there is a black...

Alright, I guess I am confused then..... How would you go about measuring a voltage difference without having some sort of reference leg? You always have to have a reference of some sort when...

I tried the circuit without grounding the Powermax 1000 to the motor and it works just fine. The negative arc voltage lead off the plasma cutter definitely doesn't like being tied to the Smartmotor...

Well, again, I have used a bunch of different resistors. The first design was
50 kOhm for R1 and 1kOhm for R2. The 2nd try used 5 kOhm for R1 and 100 ohms for R2. The final try used 1 MOhm for R1...

Jim, I guess if you don't use them, then a diode would do nothing for me either. Here is a picture of my circuit. The only thing connected to chassis ground is the cable shield. The Hypertherm is...

The large gold resistors were the first ones I used. They are not currently hooked up. The black heatshrink contains the current 1 Mohm and 20 kOhm resistors being used. Those circuits have to be...

The Powermax 1000 has built-in connection points for measuring arc voltage and those are what I am using. This is a modern plasma cutter without high voltage starting, and its designed for CNC use....

Howdy,
I have a Hypertherm PowerMax 1000 which needs a 50:1 voltage divider. I built one using the typical resistor circuit, but the plasma cutter refuses to fire when using it. I tried...

Thanks for your input all. I am open to a water table, but am a bit lost as to how to go about constructing it. The machine frame is made of 80mm 8020 aluminum extrusions. The machine (and mezzanine)...

I have a CNC plasma cutter very near completion and I am searching for a way to reduce the fumes and dust a plasma cutter generates. This is going to be used industrially on a warehouse mezzanine. I...

Howdy all,
I have a CNC plasma cutter very near completion. Thus far, everything works great. My last task is programming an Animatic's Smart Motor coupled to a THK KR33 actuator...