Need some help on configuration Plasma

1-If you want to use THC, you must have a floating torch holder, meaning there is one slider moved by the motor, to this slider you need another short slider with the limit switch and a spring, there are plenty of versions on the net just search for "floating head"
Here is one of earlier versions i had working for quite some time.


2-It is easier to use the existing gmoccapy config and edit that to your needs, but please do wait till someone else more experienced than me in gmoccapy replies to this.

3-You must add M3 and M5 to every start and end of a cut in gcode. There is gcode tools for inkscape that does that automaticly and converts the SVG to gcode for you, so use that, it is very easy to use and works like a charm.
github.com/cnc-club/gcodetools/tree/master/stable

Regards,
Tom

I do not use it, but here is the link to wiki about how to configure it.
wiki.linuxcnc.org/cgi-bin/wiki.pl?Touch_Probe
So you will also need to add a preamble to gcode for every cut so it finds the part, retracts back to pierce height, fire the torch and go down to cutting heigh.
It would be nice to have an output from the plasma cutter for ARC OK signal so you could attach that signal to motion-spindle-at-speed, that way after firing the torch it would wait for that signal from plasma to resume moving (cutting).
I use THC on all machines i build, and i have a config that has all that automaticly done whenever an M3 is issued, waits for ARC OK, stops motion if arc is lost during cut and fires the torch again etc.
First thing first, get the machine moving, then get it cutting, fine tune it till you get repeatable good results, then move on to automating stuff on it step by step. That way you have the reward of seeing the machine work and the will to make it better.
Leme add some links,
forum.linuxcnc.org/forum/49-basic-config...thc-150-setup-issues
forum.linuxcnc.org/forum/49-basic-config...t-works?limitstart=0
Have a read there, plenty of useful info.
Also add some info on your setup, Linuxcnc version, drives, motors, pulley's, ballscrews, rack and pinion, type of plasma etc.
As for THC, if you have not decided yet, have a look at THCAD from mesa, a lot of people here use that and JT (a member here) is always very helpful with setting it up, he also wrote a comp for it and the subroutines for automating work.
There are also the 'simple' THC at low prices, and most of them do work, but point your attention to Candcnc and Proma Elektronika as they are quite easy to setup.

All my plasma files are here .

JT