How to proper compile, built, and install linuxCNC

Standard Wheezy ISO is RTAI not RT_PREEMPT there is a technical difference beteen the 2.

To Quote from the Linuxcnc Download page

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LinuxCNC 2.7 Downloads

The Debian 7 Wheezy ISO uses RTAI which LinuxCNC has used as the Realtime layer since the very beginning. This gives the best real-time performance and is generally a better choice for software stepping using a parallel port. However making a stable version of a 4.x Kernel for Stretch (and eventually Buster) has proven difficult, which is partly why we still distribute the EOL Wheezy. This is compatible with Mesa PCI and PCIe and Pico interface boards but is not compatible with Mesa Ethernet interface boards.
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If you have a standard install from the Wheezy ISO, you will have to install the RT (rtai) version NOT the uspace (rt_preempt) version.

This includes the linuxcnc development package. Do not mix uspace & rt packages. Use the version that matches your kernel.

So either backup your home directory and configs and reinstall from the Wheezy ISO. Or completely remove ALL instances of Linuxcnc and install the rt (rtai) version not the uspace (rt_preempt) version. They are 2 different animals.

Note you may need to use apt purge rather than apt remove. purge will remove ALL config files, so be sure to back up any files you want to save in your home folder.

Thanks. Yes it is RTAI. I haven't done a purge, though, remove all from Syn Pckg Manager seemed to work fine. I have tested all versions, master 2.9, 2.8, 2.7 they are all running as long I use the trivkins.c No success though with installation of the rot4thaxiskins.

Once you installed the correct version of linuxcnc are you recompiling the comp ?

yes, after install of lncnc I callThe error when loading:

Ok I installed a Wheezy from the ISO to a virtual machine.

Updated Linuxcnc to 2.8.2

Compiled and installed the comp.

Fiddled with the ini & hal files from the wiki to get them to work with 2.8.2

Ran the config and it loaded fine with no issues.

So I'm guessing it has to be something at your end. As far as I can tell the config will load to the axis gui.

 

Thank you, such efforts too support is very much appreciated!!
Your right, it is - as in other cases - the config file format that makes the issue.
1) Fresh install of lncnc 2.9 from buildbot.linuxcnc,org
2) sudo halcompile --install rot4thaxiskin.c
3) Open a running config file and let it convert automatically to new format
4) Add the modification from the wiki manually
- First Only add the--> no error. kinematics is loading.
5) adapt the .ini: Most evidently, format changes of
Attention: the wiki defines 8x [AXIS] but now we need 9x [JOINTS]
6) connect

This configs are still quite outside of my circle of competence.
- 9 joints enough for 4 axes with travel limits
- What do we need for the tool offsets UVW, only [JOINTS] it seems?

Hurray, it is running. Final thing to do is to implement the correct kinematics, recompile rot4thaxiskin.c, and run the machine.
Weird is the code in rot4thaxiskin.c:I am working to fix it, something likemakes more sense to me.