G38.x and acceleration (not stopping)

Rick G wrote: 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

arhi wrote: 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.

yes, but having a different limit for different operations also makes sense

Thanks for the HAL pins tip, off to gogle

andypugh wrote: 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

arhi wrote: www.linuxcnc.org/docs/2.7/html/remap/rem...i_file_configuration
enable #<_ini[section]name> read only variables:

That's a different thing.

That is reading values from the INI file into G-code.

I was talking about the HAL pins such as ini.0.maxacceleration which you can manipulate in HAL.

For a first-cut. In the HAL file Then in the G-code you can change the value with an M68 code.
linuxcnc.org/docs/2.7/html/gcode/m-code.html#mcode:m68

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 )

Please note that ini.* hal pins are created too late to be used
in a [HAL]HALFILE (but they can be specified in a [HAL]POSTGUI_HALFILE
if the chosen gui supports it or in independent applications that
access hal pins after starting LinuxCNC.

$ man milltask
...
These pins cannot be linked or set in a halfile specified
by [HAL]HALFILE. They can be altered by independent halcmd
programs or by GUIs that support [HAL]POSTGUI_HALFILE. The
inifile is not auto‐ matically updated with these values
but can be updated using the calibration program
(emccalib.tcl) when using a [HAL]POSTGUI_HALFILE.

andypugh wrote: For a first-cut. In the HAL file

Code:

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
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?

any way to tell linuxcnc to exec a "Script" after loading?

linuxcnc.org/docs/2.7/html/config/ini-co...applications_section

But note that ini hal pins are not evaluated while a program is running.

custom_postgui.hal seems to be proper place to put these net's