G92 disable persistence
24 Feb 2024 06:15 #294178
by An
G92 disable persistence was created by An
Hi everyone,
Wondering what behaviour I could expect in axis when disable g 92 persistence is active? Would you expect to see the g92 axis value return to 0.00 when an m2 or m30 is encountered? Version 2.8.4
thanks
ant
Wondering what behaviour I could expect in axis when disable g 92 persistence is active? Would you expect to see the g92 axis value return to 0.00 when an m2 or m30 is encountered? Version 2.8.4
thanks
ant
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24 Feb 2024 10:28 #294183
by Aciera
Replied by Aciera on topic G92 disable persistence
'G92 persistence' refers to Config-Startup, M2/M30 will not affect G92 offset values/state.
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24 Feb 2024 10:44 #294185
by Aciera
Replied by Aciera on topic G92 disable persistence
Note, there are some bugs regarding 'G92' in the 'Active GCodes' list:
github.com/LinuxCNC/linuxcnc/issues/2743
github.com/LinuxCNC/linuxcnc/issues/2743
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24 Feb 2024 19:18 - 24 Feb 2024 19:19 #294235
by An
Replied by An on topic G92 disable persistence
Thanks for the reply Aciera. The reason I was asking re the program end was this (from 2.8 manual) - ‘Programmers that wish for Fanuc behavior, where G92 offsets are cleared at machine start and after a reset or program end, may disable G92 persistence by setting DISABLE_G92_PERSISTENCE
= 1 in the [RS274NGC] section of the .ini file. the 2.8 user manual ‘
= 1 in the [RS274NGC] section of the .ini file. the 2.8 user manual ‘
Last edit: 24 Feb 2024 19:19 by An. Reason: Clarity
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25 Feb 2024 12:21 #294357
by Aciera
Replied by Aciera on topic G92 disable persistence
Indeed, this is still in the current documentation for 2.9.x:
linuxcnc.org/docs/html/gcode/coordinates...ha:coordinate-system
However it does not seem to reflect the behavior observed, but I have not tested versions before 2.9. I somewhat doubt that it worked in 2.8.
Also beware of this bug:
github.com/LinuxCNC/linuxcnc/issues/2908
linuxcnc.org/docs/html/gcode/coordinates...ha:coordinate-system
However it does not seem to reflect the behavior observed, but I have not tested versions before 2.9. I somewhat doubt that it worked in 2.8.
Also beware of this bug:
github.com/LinuxCNC/linuxcnc/issues/2908
The following user(s) said Thank You: An
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25 Feb 2024 13:26 #294359
by Mecanix
Replied by Mecanix on topic G92 disable persistence
Regardless whether it works, buggy or not, you have access to a sub and given full control for most machine state behaviors (G10 offsets incl). Much safer and easier to keep track of what's what and who's doing what that way.
1. Create a file in your nc subroutines folder named "on_abort.ngc"
2. in your *.INI file, amend the RS274NGC section.
INI file
on_abort.ngc example
1. Create a file in your nc subroutines folder named "on_abort.ngc"
2. in your *.INI file, amend the RS274NGC section.
INI file
[RS274NGC]
SUBROUTINE_PATH = path_to_your/nc_subroutines
ON_ABORT_COMMAND = o <on_abort> callon_abort.ngc example
o<on_abort> sub
G59 (Bug fix. See: https://github.com/LinuxCNC/linuxcnc/issues/2745)
G54 (origin offsets are set to the default)
G18 (select XY plane)
G90 (absolute)
G94 (feed mode: units/minute)
M48 (set feed and speed overrides)
G40 (cutter compensation off)
M5 (spindle off)
G80 (cancel modal motion)
M9 (mist and coolant off)
o100 if [#1 eq 5]
(machine on)
o100 elseif [#1 eq 6]
(machine off)
o100 elseif [#1 eq 7]
(estopped)
o100 elseif [#1 eq 8]
(msg, abort pressed)
o100 else
(DEBUG, [on_abort.ngc] error parameter is [%d#1])
o100 endif
o<on_abort> endsub
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25 Feb 2024 14:09 #294362
by Aciera
Replied by Aciera on topic G92 disable persistence
Thanks for that example.
While that is a workaround for some of the shortfalls it does not come by default. Any new user would be caught totally by surprise. Even experienced users would not expect to be deceived by the DRO like this.
As a user I find it rather unimpressive that basic functionality like G92, G52 could be in such a state of disrepair (if indeed it ever worked properly).
While that is a workaround for some of the shortfalls it does not come by default. Any new user would be caught totally by surprise. Even experienced users would not expect to be deceived by the DRO like this.
As a user I find it rather unimpressive that basic functionality like G92, G52 could be in such a state of disrepair (if indeed it ever worked properly).
The following user(s) said Thank You: Mecanix
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25 Feb 2024 14:49 #294371
by Mecanix
Replied by Mecanix on topic G92 disable persistence
Devs are aware of it, Sigma1912 particularly. #2908
As long as we are all aware, in a meantime it's all good. For info that on_abort ain't a band-aid but a powerful option to gain full control on states' behavior rather. Quite reliable too, didn't miss any of my custom off/on init and close/aborts once (logic applied). Fun to know for certain in what state your tools are - recommend.
As long as we are all aware, in a meantime it's all good. For info that on_abort ain't a band-aid but a powerful option to gain full control on states' behavior rather. Quite reliable too, didn't miss any of my custom off/on init and close/aborts once (logic applied). Fun to know for certain in what state your tools are - recommend.
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25 Feb 2024 15:05 #294374
by Aciera
I know for sure because that is my alter ego on GitHub
Replied by Aciera on topic G92 disable persistence
Yes, he certainly is aware of it but unfortunately he does not know how to fix it.Devs are aware of it, Sigma1912 particularly. #2908
I know for sure because that is my alter ego on GitHub
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25 Feb 2024 15:10 #294377
by Mecanix
Replied by Mecanix on topic G92 disable persistence
wt... you're Sigma?
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