15:02
To: s.alex15 via Emc-developers
Subject: Re: [Emc-developers] announcement OpenCN, a new fork of LinuxCNC
Hello
I read a bit more about buuilding OpenCN,
and see
"OpenCN is an open source full featured framework dedicated to efficient and
hard realtime numerical control sy
I think the missing file belongs to the source code for linux, not linuxcnc.
try looking at
https://github.com/torvalds/linux/blob/master/include/asm-generic/asm-offsets.h
you may need both bodies of code avaialable to compile OpenCN
I do not see that file in my local builds ( run-in-place
Dear OpenCN developers,
Could you please help with OpenCN build problems.
First steps have done without issues:
$ cd opencn/rootfs $ make opencn_x86_defconfig $ make
but after that I have got an error:
root@OpenCN-2:~/opencn/rootfs# cd ../usr/
root@OpenCN-2:~/opencn/usr# ./build.sh
Starting
Envoyé : lundi, 25 novembre 2019 02:42
À : EMC developers
Objet : Re: [Emc-developers] announcement OpenCN, a new fork of LinuxCNC -->
Precalculations
Raoul,
Paragraph (1)
I think it would be necessary to empirically collect the dynamic behavior of
each machine component on each machine t
ds,
>
> Raoul
>
>
> -Message d'origine-
> De : Stuart Stevenson
> Envoyé : dimanche 24 novembre 2019 05:36
> À : EMC developers
> Objet : Re: [Emc-developers] announcement OpenCN, a new fork of LinuxCNC
> --> Precalculations
>
> Raoul,
> What did
-
De : Stuart Stevenson
Envoyé : dimanche 24 novembre 2019 05:36
À : EMC developers
Objet : Re: [Emc-developers] announcement OpenCN, a new fork of LinuxCNC -->
Precalculations
Raoul,
What did you compare? Why did you start this project? Lead me through your
thought process.
I have the m
Important for understanding : there is NOT ANY trajectory planning
>> > INSIDE the drive, only feedback loops and feedforward.
>> >
>> > best regards,
>> >
>> > Raoul
>> >
>> > -Message d'origine-
>> > De : Andr
d.
> >
> > best regards,
> >
> > Raoul
> >
> > -----Message d'origine-
> > De : Andrew
> > Envoyé : samedi 23 novembre 2019 12:24 À : EMC developers
> >
> > Objet : Re: [Emc-developers] announcement OpenCN, a new fork of
> > Lin
to lower
really a lot feedrate.
best regards,
Raoul
-Message d'origine-
De : Stuart Stevenson
Envoyé : samedi 23 novembre 2019 16:51
À : EMC developers
Objet : Re: [Emc-developers] announcement OpenCN, a new fork of LinuxCNC -->
Precalculations
Would it be possible to post s
On Fri, 22 Nov 2019 23:50:39 +
Herzog Raoul wrote:
> dear Gene,
>
> I agree with you, OpenCN is not meant for stepper motor applications, since
> there is no feedback control using encoders.
There are Ethercat nodes for stepper modes available to buy.
As Ethercat is a standard and rather
es.
best regards,
Raoul
-Message d'origine-
De : Andrew
Envoyé : samedi 23 novembre 2019 16:51
À : EMC developers
Objet : Re: [Emc-developers] announcement OpenCN, a new fork of LinuxCNC -->
Precalculations
Dear Raoul,
Of course I understand that. Why would you need the new plan
derstanding : there is NOT ANY trajectory planning INSIDE
> the drive, only feedback loops and feedforward.
>
> best regards,
>
> Raoul
>
> -Message d'origine-
> De : Andrew
> Envoyé : samedi 23 novembre 2019 12:24
> À : EMC developers
> Objet : R
ANY trajectory planning INSIDE
> the drive, only feedback loops and feedforward.
>
> best regards,
>
> Raoul
>
> -Message d'origine-
> De : Andrew
> Envoyé : samedi 23 novembre 2019 12:24
> À : EMC developers
> Objet : Re: [Emc-developers] announcement OpenCN,
On Sat, 23 Nov 2019 11:41:23 +
Herzog Raoul wrote:
> dear Andrew,
>
> The RS274 interpreter is still the original, important concepts like HAL,
> pins etc, are still there.
>
> Even with high end drives, you cannot simply stream position data, the
> reference signals for each drive
On Sat, 23 Nov 2019 10:15:53 +
Herzog Raoul wrote:
> dear Nicklas,
>
> there is no feedback control loop in OpenCN.
> Feedback and Feedforward is only inside the drives.
Agree, OpenCN only need to know the limitations. This could also be the case
for LinuxCNC depending on configuration
s "Bangbang" property.
>
> best regards,
>
> Raoul
>
> -Message d'origine-
> De : N
> Envoyé : samedi 23 novembre 2019 10:51 À : EMC developers
>
> Objet : Re: [Emc-developers] announcement OpenCN, a new fork of
> LinuxCNC
> --> Precalculations
&
oul
>
> -Message d'origine-
> De : N
> Envoyé : samedi 23 novembre 2019 10:51
> À : EMC developers
> Objet : Re: [Emc-developers] announcement OpenCN, a new fork of LinuxCNC
> --> Precalculations
>
> > dear Nicklas,
> >
> > of course, feedforwar
voyé : samedi 23 novembre 2019 10:51
À : EMC developers
Objet : Re: [Emc-developers] announcement OpenCN, a new fork of LinuxCNC -->
Precalculations
> dear Nicklas,
>
> of course, feedforwards are utilized (and well parametrized) in the *drives*,
> otherwise excessive
> dear Robert,
>
> thanks for your positive feedback !
>
> I'll try to answer most of your questions :
>
> 1) licence
> Good point !
> We have here a campus licence for the whole Matlab suite, as most
> universities have.
> I asked my Mathworks contact person whether the generated C code is
>
> dear Nicklas,
>
> of course, feedforwards are utilized (and well parametrized) in the *drives*,
> otherwise excessive tracking errors appear.
>
> But this is done in the *drive*, *not* in OpenCN.
> OpenCN calculates physically realizable setpoint values (according to
> "optimal control
On Friday 22 November 2019 20:07:22 Gene Heskett wrote:
> On Friday 22 November 2019 19:07:33 Dmitry Yurtaev wrote:
> > > This all sounds as if its is only applicable to servo systems, us
> > > hobbyists with steppers running everything might as well sit back
> > > and enjoy the "what ifs" since
On Friday 22 November 2019 19:07:33 Dmitry Yurtaev wrote:
> > This all sounds as if its is only applicable to servo systems, us
> > hobbyists with steppers running everything might as well sit back
> > and enjoy the "what ifs" since steppers have their own
> > insurmountable jerk problems when
>
> Raoul
>
> -Message d'origine-
> De : Gene Heskett
> Envoyé : samedi 23 novembre 2019 00:36
> À : emc-developers@lists.sourceforge.net
> Objet : Re: [Emc-developers] announcement OpenCN, a new fork of
> LinuxCNC --> Jerk control
>
> On Friday 22 No
>
> This all sounds as if its is only applicable to servo systems, us
> hobbyists with steppers running everything might as well sit back and
> enjoy the "what ifs" since steppers have their own insurmountable jerk
> problems when useing common $40 50 volt drivers, and mesa cards.
>
but us
a high end appkication range, and it was my objective
to modify LinuxCNC for these high end applications.
best regards,
Raoul
-Message d'origine-
De : Gene Heskett
Envoyé : samedi 23 novembre 2019 00:36
À : emc-developers@lists.sourceforge.net
Objet : Re: [Emc-developers] announcement Ope
On Friday 22 November 2019 18:01:41 Herzog Raoul wrote:
> dear Nicklas,
>
> a given DC bus voltage for the drives is indeed *one* reason why the
> jerk *must* be limited, otherwise excessive tracking error occurs. But
> another reason for jerk control is to avoid machine vibration.
>
> best
22 novembre 2019 23:55
À : EMC developers
Objet : Re: [Emc-developers] announcement OpenCN, a new fork of LinuxCNC -->
Jerk control
According electric motor equations commonly available jerk is controlled by
voltage and could be changed instantly which in practice is within one
switching per
re 2019 23:46
À : EMC developers
Objet : Re: [Emc-developers] announcement OpenCN, a new fork of LinuxCNC -->
Precalculations
On Fri, 22 Nov 2019 21:59:33 +
Herzog Raoul wrote:
> dear Andrew,
>
> thanks for your positive feedback.
>
> There were many reasons for u
According electric motor equations commonly available jerk is controlled by
voltage and could be changed instantly which in practice is within one
switching period while acceleration --> velocity --> position is integrated in
some way from jerk. Velocity will for example add a back-emf changing
On Fri, 22 Nov 2019 21:59:33 +
Herzog Raoul wrote:
> dear Andrew,
>
> thanks for your positive feedback.
>
> There were many reasons for us to develop OpenCN :
>
> 1) of course scientific curiosity ... I'm working for ~8 years in this field
>
> 2) but, more important, I had and have
developers
Cc : Rossier Daniel
Objet : Re: [Emc-developers] announcement OpenCN, a new fork of LinuxCNC
Hi Raoul,
That's impressive work! Thanks for sharing it with all of us. It's been a
long-standing goal for us to support limited-jerk planning and smoother blends.
It's a major achievement
r hobbyist applications, but big problem for high end commercial
applications.
best regards,
Raoul
-Message d'origine-
De : Stuart Stevenson
Envoyé : vendredi 22 novembre 2019 23:10
À : EMC developers
Objet : Re: [Emc-developers] announcement OpenCN, a new fork of LinuxCNC
Just for my
he video.
> And next year we will have the "micro5" here (
> https://www.youtube.com/watch?v=hITTmdsiihY), and we'll move OpenCN to 5
> axis !
>
> best regards,
>
> Raoul
>
>
> -Message d'origine-
> De : Andrew
> Envoyé : vendredi 22 novembre 20
have the "micro5" here (
> https://www.youtube.com/watch?v=hITTmdsiihY), and we'll move OpenCN to 5
> axis !
>
> best regards,
>
> Raoul
>
>
> -Message d'origine-
> De : Andrew
> Envoyé : vendredi 22 novembre 2019 22:15
> À : EMC developers
&g
in the video.
And next year we will have the "micro5" here
(https://www.youtube.com/watch?v=hITTmdsiihY), and we'll move OpenCN to 5 axis !
best regards,
Raoul
-Message d'origine-
De : Andrew
Envoyé : vendredi 22 novembre 2019 22:15
À : EMC developers
Objet : Re: [Emc-devel
Dear Raoul,
I truly admire your and your team's efforts.
Let me ask you about the purpose of OpenCN. Why did you decide to create it?
Was it mostly for science or you have immediate use for it?
Sincerely,
Andrew
пт, 22 лист. 2019 о 09:48 Herzog Raoul пише:
> dear Linux developers,
>
> I'm
new GUI is written in C++ (although I like very much Python :-)
best regards,
Raoul
-Message d'origine-
De : N
Envoyé : vendredi 22 novembre 2019 19:54
À : EMC developers
Objet : Re: [Emc-developers] announcement OpenCN, a new fork of LinuxCNC
> dear Linux developers,
>
&g
> dear Linux developers,
>
> I'm pleased to announce a new fork of LinuxCNC, called "OpenCN* :
Forking must be a disadvantage if some stuff must be left out but as you said
it is a major rewrite so ...
>
> OpenCN is an open source numerical control (CNC) for high end machining
> applications
be,
> some ideas could be helpful for the future evolution of LinuxCNC.
>
> best regards,
>
> Raoul
>
> -Message d'origine-
> De : Les Newell
> Envoyé : vendredi, 22 novembre 2019 13:37
> À : emc-developers@lists.sourceforge.net
> Objet : Re: [Emc-developers]
.net
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 withou
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
On Friday 22 November 2019 02:32:50 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).
>
Hardware
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
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