THCAD -10 input divider

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09 Feb 2018 07:41 #105620 by phillc54
How does one determine the correct input divider network for a C&N plasma cutter with Pilot Arc that is non blowback.
The machine does not have a CNC port and has a LT50 torch.
I am assuming this would require some type of filtering for the HF Pilot Arc start.

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09 Feb 2018 21:29 #105660 by PCW
Replied by PCW on topic THCAD -10 input divider
Setting actual input voltage range is explained in the THCAD manual

For HF start torches, you would need a high voltage rated divider ( in the negative = torch lead )

Being a bit paranoid, I would start with 10X 270K HVR37 resistors (say 9 in the negative = torch lead and 1 in the ground lead)
This should be good to 25KV spikes if insulated well enough and give you a 280V full scale range
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10 Feb 2018 01:52 - 15 Nov 2018 02:01 #105679 by phillc54
Replied by phillc54 on topic THCAD -10 input divider
Is my interpretation correct?
Would it be best to put the divider network in the plasma supply and the THCAD-10 a reasonable distance away?
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Last edit: 15 Nov 2018 02:01 by phillc54.

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