Modify qtplasmac to support multiple output codes

It may be possible to do what you need by using the plasmac state hal pin (plasmac.state-out) to control the gas.
linuxcnc.org/docs/devel/html/plasma/qtpl...lasmac_state_outputs

I am pretty sure i wrote at least twice the procedure for working with oxy on this forum, on the phone so google-foo is weak now.
Again, these are what i gathered so far, please do check everything.
Quick recap:
-Probing possible only with inductive sensor, the round thing around the torch.
-flame can not be off, so only cutting gas controling a valve
-oxy must use preheating, for long periods of time, othevise the material warps a lot
-preheating is done from 20-50mm high, cutting gas is off
-cutting is done from 5-10mm high
-preheating timer might need 30 minutes for thick plates
-piercing is done with cutting gas active
-cutting is usually slow, depends on thicknes and torch type/nozzle
-rarely needs hight adjustment during cut, thick plates and preheating minimise that, but might need on longer cuts
-using two normal inductive sensors can be used for height adjustments, but might melt on small cuts due to heat
-usable for cutting 20-160mm thick plates, even more with special torches
-new cutting torch with 3 inlets for cutting up to 70mm is 170 euro here, gas is way to expencive, 4 months ago oxygen tank fill was 120 Euro!
-probably forgot something...

I think you may have given me this info many moons ago and I was going to have a look but it fell off my radar.

Is the flame manually lit or can it be lit automatically prior to each cut?

phillc54 wrote:

Is the flame manually lit or can it be lit automatically prior to each cut?

Almost always manually, once at the start of work, and never shut off till work is done.
There might be automatic igniters, but i have yet to see one.

the machine i am retrofitting features an automatic igniter. i haven't yet tested it electronically but it has its own valve of gas and a module to emit a small arc.

why couldn't i use a floating head to probe it? i am using temperature-resistant limit switches.

my idea would be to use a few valves. one for high pressure, mid pressure and low pressure oxygen. then i would trigger them in the right 'sequence' by user parameters, but i wouldn't know how to do that except using timer relays. how could i do it within linuxcnc?

after all this sequence is done, my intention is to send an output that turns on the THC, during the cutting sequence, which seems to work as a step and direction override for the Z axis stepper motor.

There is some interesting info here:
www.pv-automation.com/en/application/pla...cnc-oxy-fuel-profile

I did figure out how to do manual Z touchoff which is selectable as a checkbox on the parameters page.