The only thing missing in this build is the ability to integrate this THC with the GRBL controller -- and Retsaj challenged us to come up with a way to do that. Well -- challenge accepted! Check out post #63 in this build's Discussion Forum -- it's been done. And it even works with Everlast i-Series plasma cutters now.
Standalone Torch Height Controller for CNC Plasma Cutting
Build in 'Plasma Cutter Builds' published by Retsaj, Mar 4, 2021.
A Torch Height Controller helps improve plasma cut quality and can save a CNC Machine from crashing. This design doesn't require you to know electronics or need any custom circuits... Its plug and play! This is a COMPLETELY standalone controller with a built-in Driver powerful enough to run just about any stepper motor. (maybe a little to powerful for a NEMA17)