Stop coolant during pause
15 Jan 2014 01:14 - 15 Jan 2014 01:14 #42776
by andypugh
Rather than issue an actual M9, you can use some HAL logic.
The pins halui.program.is-running or halui.program.is-paused are probably what you need.
You will need to alter this to suit your machine, it assumes a parport and a particular pin. I don't even know if pin 12 is even an output
Replied by andypugh on topic Stop coolant during pause
What would be the best way to automatically stop coolant (issue M9) when the program execution is paused and to turn the coolant (with correct type M7 or M8) back on after resume, but only if it was enabled before pause in the first place?
Rather than issue an actual M9, you can use some HAL logic.
The pins halui.program.is-running or halui.program.is-paused are probably what you need.
loadrt and2
...
addf and2.0 servo-thread
...
net coolant-raw iocontrol.0.coolant-flood and2.0.in0
net coolant-latch halui.program.is-running and2.0.in1
net coolant-latched and2.0.out parport.0.pin-12-outYou will need to alter this to suit your machine, it assumes a parport and a particular pin. I don't even know if pin 12 is even an output
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15 Jan 2014 05:26 #42786
by andypugh
Yes, that way should work, but I would do it with lut5, because it's cleaner and makes it easier to expand.
In the example below I have expanded it to turn off coolant if the door is open. (via a door-is-open signal created elsewhere in the logic)
I am also using the option to give functions custom names, and showing how to link a signal that is linked to its "writer" elsewhere in the hal file.
www.linuxcnc.org/docs/html/man/man9/lut5.9.html
Then the truth-table is fairly simple, 1 if input 0 is set, and no other input.
000 = 0
001 = 1
010 = 0
011 = 0
100 = 0
101 = 0
111 = 0
Replied by andypugh on topic Stop coolant during pause
Yes, that wasn't part of the specI believe the example although does block the manual coolant usage also in MDI mode, am I correct?
But, this could be IMHO fixed with (pseudo-code):
coolant-output-pin = halui.program.is-paused NOR (NOT iocontrol.0.coolant-flood)
Yes, that way should work, but I would do it with lut5, because it's cleaner and makes it easier to expand.
In the example below I have expanded it to turn off coolant if the door is open. (via a door-is-open signal created elsewhere in the logic)
I am also using the option to give functions custom names, and showing how to link a signal that is linked to its "writer" elsewhere in the hal file.
www.linuxcnc.org/docs/html/man/man9/lut5.9.html
loadrt lut5 count=2 names=flood-logic,mist-logic
addf mist-logic servo-thread
addf flood-logic servo-thread
...
net f0 iocontrol.0.coolant-flood flood-logic.in-0
net f1 halui.program.is-paused flood-logic.in-1
net door-is-open flood-logic.in-2Then the truth-table is fairly simple, 1 if input 0 is set, and no other input.
000 = 0
001 = 1
010 = 0
011 = 0
100 = 0
101 = 0
111 = 0
setp flood-logic.function 0x2Please Log in or Create an account to join the conversation.
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