LowRider 3 - Plasma Build "On a Budget" - Clarksburg, WV

[DougJoseph (Doug Joseph (design8studio))]

MESA THCAD-2 SCALE AND OFFSET:

Kudos again to Kyle, @kd2018 for his custom calculator as linked in his post here:

Lowrider2 Plasma Build

Since I’m not building a typical Marlin/GRBL contolled lowrider I’ve been having to do a lot of research on my own and asking questions in other forums to figure out how to do this. Most of the hardware selection was inspired by @uthayne’s build because he has proven it to work well for his lowrider plasma in his build thread. I’m going to do a series of write ups in this thread to document everything I’m doing for my own future reference. Maybe it’ll help someone else in the future as well. E…

…which, as of today is still available here:
https://jscalc.io/calc/NTr5QDX6WgMThBVb

Since the THCAD-2 can (essentially) emulate a THCAD-10, I used the calculator with “10” selected.

Here are the values, and a screen shot, for how I calculated the scale and offset for my THCAD-2:

Scale:		0.01002130
Offset:		3,093.7500

Based on:

Output frequency at max voltage from the calibration sticker (kHz):		897.3

Output frequency at 0V from the calibration sticker (kHz):				 99.0

Frequency divider jumper setting:
	F/1
	F/32	<- selected
	F/64
	F/128

THCAD Model:
	-10		<- selected
	-300

Plasma Machine Voltage Divider Ratio:							25 		
->	 "25" : For my 1:1 plasma machine with an HV resister (2.4M) inserted 
			externally on the negative lead, all based on guidance from 
			MESA's Peter C. Wallace ( @PCW ) on the LinuxCNC forum.