Updating to latest version of 2.8

You would have to look at the commits on github

github.com/LinuxCNC/linuxcnc/commits/master

Noe that 2.7 was first released in 2015 so version 2.8 has moved on significantly since then.

The main ones I know are the joints (motors) are now independent of axes which is much better for gantry machines, multi spindle support, and external offsets plus many many improvements and bug fixes to the trajectory planner and other core components.

THANKS i Agree
BUT with new Users alredy running a mashine
the Confusing at translating to Joints even with now 10month into CNC Stuff
i get quite chelanged as not the main Linux user

rodw wrote: You would have to look at the commits on github

github.com/LinuxCNC/linuxcnc/commits/master

Noe that 2.7 was first released in 2015 so version 2.8 has moved on significantly since then.

The main ones I know are the joints (motors) are now independent of axes which is much better for gantry machines, multi spindle support, and external offsets plus many many improvements and bug fixes to the trajectory planner and other core components.

pl7i92 wrote: THANKS i Agree
BUT with new Users alredy running a mashine
the Confusing at translating to Joints even with now 10month into CNC Stuff
i get quite chelanged as not the main Linux user

I have to say it is all so much easier today. I had to get to the PREEMPT_RT OS for my Mesa 7i76e and after I finally got it onto my PC, the latency was so bad it was unusable on my old PC. So then I bought a new USFF PC and was convinced to go with Linux Mint and the guys on the forum patiently stepped me through the process for compiling the PREEMPT_RT kernel. That was a journey! I knew I needed to run master branch to get the joint axis for my gantry and by the time I got that far, compiling Linuxcnc from source was a walk in the park!.

So about 2 weeks after that, somebody wrote a how to here on the forum to follow in my footsteps based in part on my journey. That became the goto path for preempt_rt until the stretch ISO was released.

I've found I have really enjoyed the ability to compile from source by typing just 3 lines on the console and more often than not, I've been running an experimental branch rather than the master branch. Swapping to and fro has always been very easy with 3-4 commands.. Today, I'm running a private build of Linuxcnc by forum member PhillC who has this amazing config for plasma machines if you compile from source! Updates are flying thick and fast and often an upgrade takes no more than 60 seconds!

I can't seem to get v2.8 to install.

nto@CNCRouter:~/Desktop$ sudo apt-get install linuxcnc
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package linuxcnc is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'linuxcnc' has no installation candidate


I installed per these instructions...

buildbot.linuxcnc.org/

...but i wasn't sure what to do with the "Key fingerprint". So it never got entered. What am I missing?

Ok using Synaptic I some how upgraded to v2.9 !!!

Should I and how do I roll back to 2.8?

With the releasing of 2.8, Master, has progressed to 2.9-pre. Check your repos it is for Master, not 2.8. If you change your repos to reference the new 2.8 you, should be able to then use Synaptic to force versions back to 2.8.