On Tue, 3 Mar 2020, Gene Heskett wrote:
Date: Tue, 3 Mar 2020 23:21:54 -0500
From: Gene Heskett <ghesk...@shentel.net>
Reply-To: EMC developers <emc-developers@lists.sourceforge.net>
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 Elson wrote:
Date: Tue, 03 Mar 2020 20:54:55 -0600
From: Jon Elson <el...@pico-systems.com>
Reply-To: EMC developers <emc-developers@lists.sourceforge.net>
To: EMC developers <emc-developers@lists.sourceforge.net>
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 <el...@pico-systems.com>
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
could explain a LOT of issues with
servo tuning before the change.
I use feedback-deriv in my servo systems, would a non-functioning
command-deriv make that not
work right?
Jon
No, command-deriv is only used for the FF1 feedforward calculation
Humm, Peter, none of my stuff uses that pid.n.command-deriv input now,
but I have used FF1 in my stepper configs, so how about some examples of
correct net useage statements to set that up right, once and for all?
If its working for you I would just leave the PIDs command derivative
pin unconnected so its calculated internally.
Thanks Peter.
Cheers, Gene Heskett
--
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Genes Web page <http://geneslinuxbox.net:6309/gene>
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