G38.x and acceleration (not stopping)
30 May 2016 22:04 #75268
by arhi
well if the M201/202/204 are not supported by the linuxCNC there's definitely no easy way to do it ... I'll figure something out in hw, just wanted to check if there are sw solutions first
Replied by arhi on topic G38.x and acceleration (not stopping)
It has come up before, but i know of no easy solution.
well if the M201/202/204 are not supported by the linuxCNC there's definitely no easy way to do it ... I'll figure something out in hw, just wanted to check if there are sw solutions first
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02 Jun 2016 14:19 #75335
by andypugh
No, because the whole point of the limit is to be, well, a limit.
You could look at changing the limit "on the fly" look for HAL pins called "ini.***". You could pass different values to those prior to a probe move.
Replied by andypugh on topic G38.x and acceleration (not stopping)
Yes, exactly what I want
to stop "faster then set limit" ... is that possible?
No, because the whole point of the limit is to be, well, a limit.
You could look at changing the limit "on the fly" look for HAL pins called "ini.***". You could pass different values to those prior to a probe move.
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02 Jun 2016 16:02 #75340
by arhi
Replied by arhi on topic G38.x and acceleration (not stopping)
yes, but having a different limit for different operations also makes sense
Thanks for the HAL pins tip, off to gogle
Thanks for the HAL pins tip, off to gogle
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02 Jun 2016 20:14 #75359
by arhi
www.linuxcnc.org/docs/2.7/html/remap/rem...i_file_configuration
here it's said they are readonly .. I know how to read the ini.0.maxacceleration but how to write to it?
I doubt this is going to happen in sw .. will have to do it in hw
Replied by arhi on topic G38.x and acceleration (not stopping)
You could look at changing the limit "on the fly" look for HAL pins called "ini.***". You could pass different values to those prior to a probe move.
www.linuxcnc.org/docs/2.7/html/remap/rem...i_file_configuration
enable #<_ini[section]name> read only variables: 4
if set, the interpreter will fetch read-only values from the ini file through this special variable syntax.
enable #<_hal[Hal item]> read only variables: 8
if set, the interpreter will fetch read-only values from HAL file through this special variable syntax.
here it's said they are readonly .. I know how to read the ini.0.maxacceleration but how to write to it?
I doubt this is going to happen in sw .. will have to do it in hw
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03 Jun 2016 01:25 #75369
by arhi
Replied by arhi on topic G38.x and acceleration (not stopping)
great I understood those are the same ... read already about m66 and m68 but I don't get the "E 0 to 3" is this the ## from motion.analog-out-## ?
will try immediately (it's 3:30am so will be running dry or my wife will throw me out but enough to see if it passes the syntax test )
will try immediately
(it's 3:30am so will be running dry or my wife will throw me out but enough to see if it passes the syntax test ) Please Log in or Create an account to join the conversation.
03 Jun 2016 02:21 - 03 Jun 2016 02:28 #75374
by arhi
not working
not a single ini.*.* is recognised, linuxcnc fails to start (not a pin...)
for e.g. this works
so I'm sure syntax is ok
but this is "not a pin"
(or any other ini.*.* tried 5+ different ones)
@dgarrett, what you wrote explains why this don't work but I'm not sure I understand the "They can be altered by independent halcmd
programs or by GUIs that support [HAL]POSTGUI_HALFILE" ?! are you saying that I can create a M204 script that will change the ini.0.max_acceleration value using halcmd? I do not want to change the ini file, I just want to set new acceleration values for axis for "from M204 till another M204..) .. now I never made a Mxxx on the linuxcnc but iirc it's just a shell script that you can use to do whatever you want right? so halcmd blah blah blah ? any chance you can share a cmd that will change ini.0.max_acceleration value?
EDIT: looks like I can just halcmd net ... after linuxcnc started, now these pins are available ... any way to tell linuxcnc to exec a "Script" after loading?
Replied by arhi on topic G38.x and acceleration (not stopping)
For a first-cut. In the HAL file
net Z-accel motion.analog-out-00 => ini.2.maxacceleration
not working
not a single ini.*.* is recognised, linuxcnc fails to start (not a pin...)
for e.g. this works
net lalala motion.analog-in-00 <= axis.0.backlash-velso I'm sure syntax is ok
but this is "not a pin"
net lalala motion.analog-in-00 <= ini.0.backlash(or any other ini.*.* tried 5+ different ones)
@dgarrett, what you wrote explains why this don't work but I'm not sure I understand the "They can be altered by independent halcmd
programs or by GUIs that support [HAL]POSTGUI_HALFILE" ?! are you saying that I can create a M204 script that will change the ini.0.max_acceleration value using halcmd? I do not want to change the ini file, I just want to set new acceleration values for axis for "from M204 till another M204..) .. now I never made a Mxxx on the linuxcnc but iirc it's just a shell script that you can use to do whatever you want right? so halcmd blah blah blah ? any chance you can share a cmd that will change ini.0.max_acceleration value?
EDIT: looks like I can just halcmd net ... after linuxcnc started, now these pins are available ... any way to tell linuxcnc to exec a "Script" after loading?
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