We are seeing a number of issues reported to the forum where the fix
to the PID command-deriv input is causing problems with existing
configurations that net that pin to a signal that is not otherwise
connected to a source.
Should we consider a 2.7.16 that reverts this fix, and push the actual
fix
On 03/03/2020 10:13 AM, andy pugh wrote:
We are seeing a number of issues reported to the forum where the fix
to the PID command-deriv input is causing problems with existing
configurations that net that pin to a signal that is not otherwise
connected to a source.
Should we consider a 2.7.16 tha
> On 3. Mar 2020, at 17:49, Jon Elson wrote:
>
> On 03/03/2020 10:13 AM, andy pugh wrote:
>> We are seeing a number of issues reported to the forum where the fix
>> to the PID command-deriv input is causing problems with existing
>> configurations that net that pin to a signal that is not othe
On Tue, 3 Mar 2020 at 16:50, Jon Elson wrote:
> Does anybody have a more specific case of how it is failing?
https://forum.linuxcnc.org/38-general-linuxcnc-questions/38367-2-7-15?start=0
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mec
On Tuesday 03 March 2020 11:13:17 andy pugh wrote:
> We are seeing a number of issues reported to the forum where the fix
> to the PID command-deriv input is causing problems with existing
> configurations that net that pin to a signal that is not otherwise
> connected to a source.
>
> Should we c
On Tuesday 03 March 2020 11:54:09 andy pugh wrote:
> On Tue, 3 Mar 2020 at 16:50, Jon Elson wrote:
> > Does anybody have a more specific case of how it is failing?
>
> https://forum.linuxcnc.org/38-general-linuxcnc-questions/38367-2-7-15?
>start=0
This thread is at least 2 years newer than the p
reverting seems reasonable. In the long run why don't we change it from 'magic'
to a switch - like a parameter to change the behavior?
Chris
From: andy pugh
Sent: March 3, 2020 4:13 PM
To: EMC developers
Subject: [Emc-developers] 2.7.15 PID Fix
On 03/03/2020 10:54 AM, andy pugh wrote:
On Tue, 3 Mar 2020 at 16:50, Jon Elson wrote:
Does anybody have a more specific case of how it is failing?
https://forum.linuxcnc.org/38-general-linuxcnc-questions/38367-2-7-15?start=0
So, the pid command-deriv was not used in the past? Geez,
that c
Looking at the 2.7 docs for the PID component, there is no
mention of a pid.n.command-deriv
pin. There is a commandD and a commandDD which seem to be
outputs available when the
debug mode is turned on.
Jon
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On Tue, 3 Mar 2020, Jon Elson wrote:
Date: Tue, 03 Mar 2020 20:54:55 -0600
From: Jon Elson
Reply-To: EMC developers
To: EMC developers
Subject: Re: [Emc-developers] 2.7.15 PID Fix
On 03/03/2020 10:54 AM, andy pugh wrote:
On Tue, 3 Mar 2020 at 16:50, Jon Elson wrote:
Does anybody have a
On Tuesday 03 March 2020 21:54:55 Jon Elson wrote:
> On 03/03/2020 10:54 AM, andy pugh wrote:
> > On Tue, 3 Mar 2020 at 16:50, Jon Elson
wrote:
> >> Does anybody have a more specific case of how it is failing?
> >
> > https://forum.linuxcnc.org/38-general-linuxcnc-questions/38367-2-7-1
> >5?star
On Tuesday 03 March 2020 22:22:25 Peter C. Wallace wrote:
> On Tue, 3 Mar 2020, Jon Elson wrote:
> > Date: Tue, 03 Mar 2020 20:54:55 -0600
> > From: Jon Elson
> > Reply-To: EMC developers
> > To: EMC developers
> > Subject: Re: [Emc-developers] 2.7.15 PID F
On Tue, 3 Mar 2020, Gene Heskett wrote:
Date: Tue, 3 Mar 2020 23:21:54 -0500
From: Gene Heskett
Reply-To: EMC developers
To: emc-developers@lists.sourceforge.net
Subject: Re: [Emc-developers] 2.7.15 PID Fix
On Tuesday 03 March 2020 22:22:25 Peter C. Wallace wrote:
On Tue, 3 Mar 2020, Jon
On 03/03/2020 09:22 PM, Peter C. Wallace wrote:
No, command-deriv is only used for the FF1 feedforward
calculation
But, I DO use FF1 in practically all my configs, and it does
seem to work. So, the problem is linking a signal to the
command-deriv pin, but then NOT feeding it the correct
der
On Wed, 4 Mar 2020, Jon Elson wrote:
Date: Wed, 04 Mar 2020 10:44:26 -0600
From: Jon Elson
Reply-To: EMC developers
To: EMC developers
Subject: Re: [Emc-developers] 2.7.15 PID Fix
On 03/03/2020 09:22 PM, Peter C. Wallace wrote:
No, command-deriv is only used for the FF1 feedforward
On Wed, 4 Mar 2020 at 16:55, Peter C. Wallace wrote:
> > As for the docs, the generic 2.7 docs do NOT show any reference to
> > pid.x.command-deriv
> > Am I looking in the wrong place, or has it been removed?
>
> It was added early in 2.8 and it works the same as feedback-deriv
> (value calculate
On Wed, 4 Mar 2020, andy pugh wrote:
Date: Wed, 4 Mar 2020 17:20:02 +
From: andy pugh
Reply-To: EMC developers
To: EMC developers
Subject: Re: [Emc-developers] 2.7.15 PID Fix
On Wed, 4 Mar 2020 at 16:55, Peter C. Wallace wrote:
> As for the docs, the generic 2.7 docs do NOT show
On Wed, 4 Mar 2020 at 17:26, Peter C. Wallace wrote:
> It was first added to 2.8 and them merged into 2.7 before the
> 2.7.15 release AFAIK
I think that they were added in 2010:
https://github.com/LinuxCNC/linuxcnc/commit/44586b831e1ef5e826003190ab317cda76b6e8e3#diff-912d11dfa52738be509f63e4ff19
On Wed, 4 Mar 2020, andy pugh wrote:
Date: Wed, 4 Mar 2020 17:52:09 +
From: andy pugh
Reply-To: EMC developers
To: EMC developers
Subject: Re: [Emc-developers] 2.7.15 PID Fix
On Wed, 4 Mar 2020 at 17:26, Peter C. Wallace wrote:
It was first added to 2.8 and them merged into 2.7
On Wed, 4 Mar 2020 at 18:07, Peter C. Wallace wrote:
I meant the patch that made the command derivative behavior match the
> feedback
> derivative behavior (and the manual), that was quite recent.
>
Ah, sorry. I thought you were explaining the statement that the pins are
not in the docs.
( Which
On 03/04/2020 02:14 PM, andy pugh wrote:
On Wed, 4 Mar 2020 at 18:07, Peter C. Wallace wrote:
I meant the patch that made the command derivative behavior match the
feedback
derivative behavior (and the manual), that was quite recent.
Ah, sorry. I thought you were explaining the statement tha
On Wednesday 04 March 2020 12:52:09 andy pugh wrote:
> On Wed, 4 Mar 2020 at 17:26, Peter C. Wallace wrote:
> > It was first added to 2.8 and them merged into 2.7 before the
> > 2.7.15 release AFAIK
>
> I think that they were added in 2010:
> https://github.com/LinuxCNC/linuxcnc/commit/44586b831e
On Thu, 5 Mar 2020 at 03:14, Gene Heskett wrote:
> encoder. But from reading that, I fail to deduct a source for cmd.deriv.
It's a feed-forward input, and the source would be the velocity output
from the motion controller for that joint.
(ie, the motion system outputs both a current position _an
On Wed, 4 Mar 2020, Gene Heskett wrote:
Date: Wed, 4 Mar 2020 22:12:47 -0500
From: Gene Heskett
Reply-To: EMC developers
To: emc-developers@lists.sourceforge.net
Subject: Re: [Emc-developers] 2.7.15 PID Fix
On Wednesday 04 March 2020 12:52:09 andy pugh wrote:
On Wed, 4 Mar 2020 at 17:26
On Thursday 05 March 2020 07:16:20 andy pugh wrote:
> On Thu, 5 Mar 2020 at 03:14, Gene Heskett wrote:
> > encoder. But from reading that, I fail to deduct a source for
> > cmd.deriv.
>
> It's a feed-forward input, and the source would be the velocity output
> from the motion controller for that
On Thursday 05 March 2020 09:25:01 Peter C. Wallace wrote:
> On Wed, 4 Mar 2020, Gene Heskett wrote:
> > Date: Wed, 4 Mar 2020 22:12:47 -0500
> > From: Gene Heskett
> > Reply-To: EMC developers
> > To: emc-developers@lists.sourceforge.net
> > Subject: Re
On Thu, 5 Mar 2020, Gene Heskett wrote:
Date: Thu, 5 Mar 2020 10:42:19 -0500
From: Gene Heskett
Reply-To: EMC developers
To: emc-developers@lists.sourceforge.net
Subject: Re: [Emc-developers] 2.7.15 PID Fix
On Thursday 05 March 2020 09:25:01 Peter C. Wallace wrote:
On Wed, 4 Mar 2020, Gene
On Thursday 05 March 2020 10:54:49 Peter C. Wallace wrote:
> On Thu, 5 Mar 2020, Gene Heskett wrote:
> > Date: Thu, 5 Mar 2020 10:42:19 -0500
> > From: Gene Heskett
> > Reply-To: EMC developers
> > To: emc-developers@lists.sourceforge.net
> > Subject: Re
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