The issue I have is the old plasma has an internal 100:1 voltage divider
The THC is a Fangling F1628S and as far as I can tell will only work with a 100:1 voltage divider
The Hypertherm has an internal 20:1 that feeds the voltage divider board
This then allows 20, 21.1, 30, 40 and 50:1
So I need to convert the Hyperthem to 100:1
I dont have an external voltage divider to use raw arc voltage
I can get one in but I'd prefer not to modify the hypertherm
As best I can tell the hyperthem internal 20:1 voltage divider is
100K/5K
![Image](https://artinmetal.com.au/files/1252.jpg)
This is connected to the CPC voltage divider
![Image](https://artinmetal.com.au/files/1254.png)
The 50:1 dip switch adds a 3K32 resistor in parallel to the 20:1
So 5K and 3K32 in parallel is 2K making the voltage divider 100K/2K = 50:1
So adding an external 2K across pins 5 and 6 on the CPC should make the ratio 100:1
5K,3K32,2K in parallel is 998.8 ohms
100K/998.8 = 100.12:1 (close enough to 100)
Anyway going to try this after the holiday break