dear Les,
the modifications we had to introduce to LinuxCNC are very substantial, mainly
due to
1) the fact that we use a minimalistic, highy patched Xenomai, where we can
dedicate processor cores to specific tasks (asymmetric multiprocessing (AMP)).
2) the fact that the trajectory planning is completely rewritten
For the time being, we also had to leave away certain functionalities of
LinuxCNC to keep it simple.
I believe a later merge of OpenCN and LinuxCNC would be extremely difficult, if
not impossible.
One of our goals was to establish a stable high speed EtherCAT communication to
the drives at a rate of 10 kHz using the distributed clock (DC).
It turned out that this is nearly impossible on x86, even with our Xenomai AMP
: the GPU is perturbing too much with DMA access to the main memory ...
One solution would be to "externalize" the GUI (work in progress here).
So, please consider our OpenCN as an experimental branch, where, maybe, some
ideas could be helpful for the future evolution of LinuxCNC.
best regards,
Raoul
-----Message d'origine-----
De : Les Newell <[email protected]>
Envoyé : vendredi, 22 novembre 2019 13:37
À : [email protected]
Objet : Re: [Emc-developers] announcement OpenCN, a new fork of LinuxCNC
Hi Raul,
Why create a fork? Maintaining a project like this is a huge amount of work and
forking often results in a lot of duplicated work. LCNC is very modular so it
is possible to add a lot of functionality without breaking existing code. If
you work with the LCNC project you have access to a lot of users and developers
to help you with testing and debugging. If you create a fork of your own you
need to then build up your own user base, which could take a long time.
Les
On 22/11/2019 07:32, Herzog Raoul wrote:
> dear Linux developers,
>
> I'm pleased to announce a new fork of LinuxCNC, called "OpenCN* :
>
> OpenCN is an open source numerical control (CNC) for high end machining
> applications (high dynamics, high precision).
>
> OpenCN is originally based on LinuxCNC, but with strong enhancements :
>
> -) completely reworked trajectory planning (TP) including jerk control
> based on embedded optimization
> -) Xenomai asymmetric multiprocessing (AMP) for hard real time, low
> latency
> -) up to date Linux kernel
> -) EtherCat with 10 kHz frame rate and distributed clock (DC), mode B
> -) new Qt based GUI superseding "axis"
>
> The HW platforms are x86 (available) and ARM (in preparation).
>
> Software :
> gitlab.com/mecatronyx/opencnc/opencn<https://gitlab.com/mecatronyx/ope
> ncnc/opencn> Doc :
> mecatronyx.gitlab.io/opencnc/doc/<https://mecatronyx.gitlab.io/opencnc
> /doc/> Youtube :
> www.youtube.com/channel/UC8FQCu_fKYfK7QRDN0j_dBw<https://www.youtube.c
> om/channel/UC8FQCu_fKYfK7QRDN0j_dBw>
>
>
> best regards,
>
> Raoul
>
>
>
> [http://correspondance.heig-vd.ch/assets/heig.png]
>
> Raoul Herzog
> Dr.
>
> Professeur
> Institut d'Automatisation Industrielle (iAi) Groupe mecatronYx Prof. :
>
> +41 24 557 61 93
>
> Site web :
>
> http://www.iai.heig-vd.ch
>
>
> [email protected]<mailto:[email protected]>
>
>
>
>
> _______________________________________________
> Emc-developers mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/emc-developers
_______________________________________________
Emc-developers mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/emc-developers
_______________________________________________
Emc-developers mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/emc-developers
