On Thursday, January 6, 2022 2:35:25 PM EST Peter C. Wallace wrote:
> On Thu, 6 Jan 2022, gene heskett wrote:
> > Perhaps, Peter or Chris, a post describing what that filter CAN do is in
> > order. I've looked at its man page but if there was a useful function
> > there I didn't trigger on it.
> >
On Thu, 6 Jan 2022, gene heskett wrote:
Perhaps, Peter or Chris, a post describing what that filter CAN do is in
order. I've looked at its man page but if there was a useful function there
I didn't trigger on it.
And here, the web links are inactive plus it doesn't copy/paste.
Is that supposed
; >
> > To: "Enhanced Machine Controller (EMC)"
> >
> > Subject: Re: [Emc-users] Very good software backlash control demo.
> >
> > this robot that loads pencil leads it really just a software testing
> > device. A research tool. What is new here
On Wed, 5 Jan 2022, Chris Albertson wrote:
Date: Wed, 5 Jan 2022 19:38:46 -0800
From: Chris Albertson
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: Re: [Emc-users] Very good software backlash control demo.
this rob
this robot that loads pencil leads it really just a software testing
device. A research tool. What is new here s not the idea too use two
sensors but
1) use a predictive model that says how the system will flex in the future
in s given acceleration is apllied.
2) collect data while the machine
Hi,
I ran across an article by one of the servo drive firms that said the
using two sensors/axis improved motion. I think they used a resolver on
the drive and an encoder on the ball screw. While this improves motion
that assumes you have very good ball screws. I think that a better
approach w
On Monday, January 3, 2022 11:45:13 PM EST Sam Sokolik wrote:
> I think it is just easy to have 2 pid's and sum them.. (one on the motor
> encoder with P,D and feed forward - the other with scales and the I term)
> Then you are not re-writing the pid component for some odd corner case.
>
> sam
C
> From: Chris Albertson [mailto:albertson.ch...@gmail.com]
>
> I think his method would work for your mill. Yes the tool pushed the
> table and the table moves.
How does he know the table moves?
Unless the encoder is a scale physically connected to the table he has no
feedback on where t
I think it is just easy to have 2 pid's and sum them.. (one on the motor
encoder with P,D and feed forward - the other with scales and the I term)
Then you are not re-writing the pid component for some odd corner case.
sam
On Mon, Jan 3, 2022 at 10:36 PM gene heskett wrote:
> On Monday, Januar
On Monday, January 3, 2022 11:00:54 PM EST Sam Sokolik wrote:
> I think this just would work with linuxcnc and scales + motor encoders.
> WIth the scales using only I in the 2 pid loops - it would be constantly
> correcting backlash to keep the position.. (that is what the G&L did)
>
> sam
Or, b
On Monday, January 3, 2022 11:00:54 PM EST Sam Sokolik wrote:
> I think this just would work with linuxcnc and scales + motor encoders.
> WIth the scales using only I in the 2 pid loops - it would be constantly
> correcting backlash to keep the position.. (that is what the G&L did)
>
> sam
This
I think this just would work with linuxcnc and scales + motor encoders.
WIth the scales using only I in the 2 pid loops - it would be constantly
correcting backlash to keep the position.. (that is what the G&L did)
sam
On Mon, Jan 3, 2022 at 9:50 PM Chris Albertson
wrote:
> I think his method
I think his method would work for your mill. Yes the tool pushed the
table and the table moves. What he does is not just a double loop. He
models the movement of the table and predicts how it will move.To do
this on a mill you would need encoders on the table and then run a
calibration cyc
Interesting concept. I notice that although he showed his finger pushing on
the jaws (and text said compensation turned off) we never saw him disturb the
jaws with compensation on. That he can position accurately is pretty cool.
But backlash on my X axis results in the milling cutter pulling
This has been done at a bigger scale... (2 feedback loops)
https://web.archive.org/web/20160222165548/http://jmkasunich.com/cgi-bin/blosxom/shoptask/wichita-trip-02-20-08.html
http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Combining_Two_Feedback_Devices_On_One_Axis
On Mon, Jan 3, 2022, 8:42 PM Chris
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