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I’m on that topic (at the same time I express my admiration for the design shown there) but I didn’t see anything on my question. 
Clearly I'm doing something wrong in the hal file.

But what exactly?

Have a look at this, there is also the complete config attached there, it is the same thing as laser as it uses PWM to control the grinding bit pressure, and it also should have provisions for turning off the laser when canceling or pausing or stopping a job, that is normally not done with normal configs.
forum.linuxcnc.org/show-your-stuff/46752...er-scratcher?start=0

        ​Hello everyone,​I'm working on repairing a Yaskawa CACR-SR20BE12G-E servo drive. I initially had to replace all the capacitors as two of them had incorrect values, which was causing the A.02 error. After installing the board, everything worked fine for about 30 minutes, but then the auxiliary power supply errors A.03 and A.40 appeared.​I've isolated the critical components after the transformer T3076, specifically D20 (code C3) and AVR4 (code 8C E4), which now appear to be faulty.​I need help confirming the identity and replacement parts for these components.​1. D20 (Code C3) - Raddrizzatore Schottky​I have traced the pinout of D20 and have the following connections:​CENTER PIN: Connects to the positive pole of capacitor C41 33uf 25v​TOP LEFT PIN: Connects to the transformer output, passing through diode D32.​RIGHT PIN: Goes to the negative side of the board (or where the letter 'N' is marked).​Question: Can anyone who has successfully repaired this confirm if the correct replacement is indeed the BAT54C (Dual Common Cathode, SOT-23)?​2. AVR4 (Code 8C E4) -​dimension(approx. 3x2mm). The marking on my faulty board is 8C E4, while a known working board shows 8C E8 (I assume the last digit is just a batch code).​Pinout/Measurements:​I'm using the following numbering: Pin 1 (Top Left), Pin 2 (Center), Pin 3 (Top Right), and Pin 4 (Bottom). Note that Pin 4 is common with Pin 2 on the board.​Using the diode function on my multimeter:​Black probe on Pin 2 or 4, Red probe on Pin 1 or 3 Reads 2.3v- 2.4V​Inverting the probes Reads 0.5 - 0.6V

Can you help me please? 

Good afternoon colleagues.
I ask for help connecting the laser to the machine.
My machine works properly without LPT. Scheme XXYYZ. This is five motorcycles. And a spindle. The spindle to the 14-pin LPT port is such a feature of the controller.
I read topics -
forum.linuxcnc.org/10-advanced-configura...pwm-output-for-laser
forum.linuxcnc.org/plasma-laser/32691-settings-from-g-code-file
forum.linuxcnc.org/10-advanced-configura...er-control-using-pwm

From what I read, I understood the following - 
1. from the g-code file, control the status and power of the laser using the M67-M68 commands
2. the main thing is that the correct configuration must be made in the machine settings file 

My PWM laser is up to 20kgz. 

I'm trying to add the following lines -
loadrt pwmgen output_type=1.0 #1 this is for Spindel, 0 for Laser

...

    #net spindle-pwm     => parport.0.pin-14-out
    #setp parport.0.pin-14-out-invert 1
    net spindle-cmd-rpm => pwmgen.0.value
    net spindle-on <= spindle.0.on => pwmgen.0.enable
    net spindle-pwm <= pwmgen.0.pwm
    
    #setp pwmgen.0.pwm-freq 100.0
    #setp pwmgen.0.scale 15000.0
    #setp pwmgen.0.offset 0.133333333333
    #setp pwmgen.0.dither-pwm true
    
    net spindle-cmd-rpm     <= spindle.0.speed-out
    net spindle-cmd-rpm-abs <= spindle.0.speed-out-abs
    net spindle-cmd-rps     <= spindle.0.speed-out-rps
    net spindle-cmd-rps-abs <= spindle.0.speed-out-rps-abs
    net spindle-at-speed    => spindle.0.at-speed
#лазерный блок
#addf pwmgen.make-pulses base-thread
  #  addf pwmgen.update servo-thread
    setp parport.0.pin-14-out-invert 0
    setp pwmgen.1.enable TRUE
    #setp pwmgen.1.pwm-freq 20000
    net analogout motion.analog-out-00 => pwmgen.1.value
    net laserpwm pwmgen.1.pwm => parport.0.pin-14-out
        

doesn't work. The laser is not turned on by the M68 E0 Q 1 commands

Please tell me what I'm doing wrong? And is it possible to use the same pin 14 (I physically turn off the spindle or laser) for control?

linuxcnc.org/docs/html/gui/gladevcp.html
You can assign names to signal pins and can use those names multiple times.
forum.linuxcnc.org/25-classicladder/5398...ignals-pins-together