motion.so not found error ...

I have installed LinuxCNC ver 2.9.7 including linuxcnc-uspace. LinuxCNC seems to be running fine.

I'm trying to learn HAL and coded "loadrt motion" in my playground HAL file.

When I open my playground config in LinuxCNC, I keep getting the error: "motion: dlopen: /usr/lib/linuxcnc/modules/motion.so: cannot open shared object file: No such file or directory"

When I run "dpkg -l | grep linuxcnc", I see: "ii  linuxcnc-uspace  1:2.9.7  amd64 motion controller for CNC machines and robots"

When I view the "/usr/lib/linuxcnc/modules" directory there is a "motmod.so" file but no "motion.so" file.

It is my understanding that motmod.so was part of LinuxCNC v2.8 and older and motion.so is part of LinuxCNC v2.9 and up.

I am a new to and just learning LinuxCNC as I prepare for a manual lathe CNC conversion.

Am I doing something wrong? Is there an issue with my LinuxCNC install?

Thanks!

All the Sims work on 2.97 so I suspect the issue is in your hal file. share it and we can look or compare with one of the Sims.

The name is motmod.so
 

'motion' is not a hal component so you cannot and need not load it in hal.

rodw wrote:

All the Sims work on 2.97 so I suspect the issue is in your hal file. share it and we can look or compare with one of the Sims.
 

Thank you, attached is my HAL file.

Thank you @Aviera and @Hakan! I will try that.

Review this working hal file against yours
github.com/rodw-au/showstopper/blob/master/my_Plasma.hal
nowhere is there a loadrt motion command

Thanks for reviewing my HAL file. So I learned that there is no "motion" component. Instead, it is the "motmod" component I should be trying to load.

My bigger mistake was trying to code a HAL file by hand from scratch. I learned that I can use LinuxCNC to create a configuration which generates the ".ini" and ".hal" files. And then I can modify those if they require any other changes.

Like I said in my earlier post, I'm just learning LinuxCNC now. And on top of that, I'm trying to understand HAL, and what Mesa cards I need to buy, and what components I need for the lathe CNC conversion. I am drinking from a fire hose!

Thanks again for your help!

MusicCityMfg wrote:

My bigger mistake was trying to code a HAL file by hand from scratch.

That is never a mistake, it hugely pays off later and makes things ... well, simple.

MusicCityMfg wrote:

I am drinking from a fire hose!

Isn't it refreshing !