THC for Hypertherm 45XP based on DT-115 / LM393 comparator

[HAL]
# HALUI to interact with NML
# Run before any other HALFILE
HALUI =		halui
# list of hal config files to run through halcmd
#+ files are executed in the order in which they appear
HALFILE = stepper.hal
HALFILE = torchud.hal
HALFILE =	thc.hal
HALFILE =	IO.hal

# A file to hook pyvcp to hal signals
POSTGUI_HALFILE =	thc_vcp.hal

[HAL]
# required
TWOPASS = ON
# the base machine
HALFILE = plasma.hal
# the plasmac component connections
HALFILE = plasmac.tcl
# the plasmac machine connections
HALFILE = plasma_connections.hal
# THC following Tommylight's 
HALFILE = torchud.hal
HALFILE =	thc.hal
# use this for customisation after GUI has loaded
POSTGUI_HALFILE = postgui.hal
# required
HALUI = halui

sudo apt install libcanberra-gtk-module

Error report created by /usr/lib/tcltk/linuxcnc/show_errors.tcl:

Print file information:
RUN_IN_PLACE=no
LINUXCNC_DIR=
LINUXCNC_BIN_DIR=/usr/bin
LINUXCNC_TCL_DIR=/usr/lib/tcltk/linuxcnc
LINUXCNC_SCRIPT_DIR=
LINUXCNC_RTLIB_DIR=/usr/lib/linuxcnc/modules
LINUXCNC_CONFIG_DIR=
LINUXCNC_LANG_DIR=/usr/lib/tcltk/linuxcnc/msgs
INIVAR=inivar
HALCMD=halcmd
LINUXCNC_EMCSH=/usr/bin/wish8.6
LINUXCNC - 2.8.0
Machine configuration directory is '/home/cnc/linuxcnc/configs/plasma'
Machine configuration file is 'plasma.ini'
INIFILE=/home/cnc/linuxcnc/configs/plasma/plasma.ini
VERSION=1.1

check_config: (trivkins kinematics) WARNING:
  INCONSISTENT coordinates specifications:
               trivkins coordinates=XYYZ
               [TRAJ]COORDINATES=XYZ

PARAMETER_FILE=metric_parameters.txt
TASK=milltask
HALUI=halui
DISPLAY=axis
COORDINATES=X Y Z
KINEMATICS=trivkins coordinates=XYYZ kinstype=BOTH
Starting LinuxCNC...
Starting LinuxCNC server program: linuxcncsvr
Loading Real Time OS, RTAPI, and HAL_LIB modules
Starting LinuxCNC IO program: io
Starting HAL User Interface program: halui
twopass:invoked with <> options
twopass:found ./plasma.hal
twopass:found ././plasmac/plasmac.tcl
twopass:found ./plasma_connections.hal
twopass: Error in file ./plasma_connections.hal:
    Pin 'encoder.0.velocity' does not exist
Shutting down and cleaning up LinuxCNC...
config string '0 out 1 out'
Removing HAL_LIB, RTAPI, and Real Time OS modules
Removing NML shared memory segments

Debug file information:
Note: Using POSIX realtime
980
Stopping realtime threads
Unloading hal components
Note: Using POSIX realtime



-----------------------------------------------------------------------
Info report created by linuxcnc_info:
The file:    /tmp/linuxcnc_info.txt
can be posted to a forum or a web site like:
     http://pastebin.com
in order to provide information about the linuxcnc
system and configuration.

                Date: Sat 31 Oct 23:44:35 GMT 2020
            UTC Date: Sat 31 Oct 23:44:35 UTC 2020
        this program: /usr/bin/linuxcnc_info
              uptime: 23:44:35 up 6 min, 1 user, load average: 1.31, 0.85, 0.40
     lsb_release -sa: Debian Debian GNU/Linux 10 (buster) 10 buster
      which linuxcnc: /usr/bin/linuxcnc
                 pwd: /home/cnc/linuxcnc/configs/plasma
                USER: cnc
             LOGNAME: cnc
                HOME: /home/cnc
              EDITOR: 
              VISUAL: 
            LANGUAGE: en_GB:en
                TERM: dumb
           COLORTERM: 
             DISPLAY: :0.0
             DESKTOP: lightdm-xsession
        display size: 1920x1080 pixels (508x285 millimeters)
                PATH: /usr/bin:/home/cnc/linuxcnc/configs/plasma/bin:/usr/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games

uname items:
         nodename -n: PlasmaCNC
      kernel-name -s: Linux
      kernel-vers -v: #1 SMP PREEMPT RT Debian 4.19.146-1 (2020-09-17)
          machine -m: x86_64
        processor -p: unknown
         platform -i: unknown
      oper system -o: GNU/Linux

/proc items:
             cmdline: BOOT_IMAGE=/vmlinuz-4.19.0-11-rt-amd64 root=UUID=db97749c-79f6-49f7-9f7a-eebe59d40acc ro initrd=/install/gtk/initrd.gz quiet
          model name: Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
               cores: 4
             cpu MHz: 1597.881
             parport: 0000-0000 : parport0 0000-0000 : parport0 0000-0000 : parport1
              serial: 

Versions:
                 gcc: gcc (Debian 8.3.0-6) 8.3.0
              python: Python 2.7.16
                 git: not_in_PATH
          git commit: NA
                 tcl: 8.6
                  tk: 8.6
               glade: not_in_PATH
          glade-gtk2: not_in_PATH

linuxcnc_var all:

     LINUXCNCVERSION: 2.8.0
LINUXCNC_AUX_GLADEVCP: /usr/share/linuxcnc/aux_gladevcp
LINUXCNC_AUX_EXAMPLES: /usr/share/linuxcnc/aux_examples
            REALTIME: /etc/init.d/realtime
                 RTS: uspace
          HALLIB_DIR: /usr/share/linuxcnc/hallib

dpkg -l '*linuxcnc*':
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                Version      Architecture Description
+++-===================-============-============-=====================================================================
un  linuxcnc            <none>       <none>       (no description available)
un  linuxcnc-dev        <none>       <none>       (no description available)
un  linuxcnc-doc        <none>       <none>       (no description available)
ii  linuxcnc-doc-cn     1:2.8.0      all          motion controller for CNC machines and robots (Chinese
ii  linuxcnc-doc-en     1:2.8.0      all          motion controller for CNC machines and robots (English documentation)
ii  linuxcnc-doc-es     1:2.8.0      all          controlador de movimiento para máquinas CNC y robots (Español).
ii  linuxcnc-doc-fr     1:2.8.0      all          motion controller for CNC machines and robots (French documentation)
un  linuxcnc-sim        <none>       <none>       (no description available)
un  linuxcnc-sim-dev    <none>       <none>       (no description available)
ii  linuxcnc-uspace     1:2.8.0      amd64        motion controller for CNC machines and robots
ii  linuxcnc-uspace-dev 1:2.8.0      amd64        PC based motion controller for real-time Linux

loadrt encoder num_chan=1
setp encoder.0.counter−mode 1
setp encoder.0.position−scale -1
addf encoder.update-counters base-thread
addf encoder.capture-position servo-thread
net arc-voltage-raw parport.1.pin-15-in encoder.0.phase-A
net plasmac:arc-voltage-in encoder.0.velocity => plasmac.arc-voltage-in