Jon machine is going mint. I don't currently have encoders connected back
to the control but I did. The motors are tuned mint. It's just the table
mass at the acceleration jumps a bit when moved.
I might just enable reducing feed rate at corners in fusion360 cam for now
if I can.
I want the
> On Thursday 23 July 2020 13:34:48 Nicklas SB Karlsson wrote:
>
> > > On Thursday 23 July 2020 07:53:45 andy pugh wrote:
> > > > On Thu, 23 Jul 2020 at 12:47, Nicklas SB Karlsson
> > > >
> > > > wrote:
> > > > > > I wonder what effect could be had by rate-limiting the PID
> > > > > > output to
On Thursday 23 July 2020 13:34:48 Nicklas SB Karlsson wrote:
> > On Thursday 23 July 2020 07:53:45 andy pugh wrote:
> > > On Thu, 23 Jul 2020 at 12:47, Nicklas SB Karlsson
> > >
> > > wrote:
> > > > > I wonder what effect could be had by rate-limiting the PID
> > > > > output to the motors?
> >
On Thu, 23 Jul 2020 at 18:30, Nicklas SB Karlsson
wrote:
> Limit3 function is what trajector planner must follow if acceleration is
> allowed to change instantly, if jerk could be changed instantly it had to
> follw a limit4 function
...
> In doubt Limit3 function is useful in between PID and
> On Thursday 23 July 2020 07:53:45 andy pugh wrote:
>
> > On Thu, 23 Jul 2020 at 12:47, Nicklas SB Karlsson
> >
> > wrote:
> > > > I wonder what effect could be had by rate-limiting the PID output
> > > > to the motors?
> > >
> > > Integrator should ideally have anti-windup.
> >
> > Anti-windup
> On Thu, 23 Jul 2020 at 12:47, Nicklas SB Karlsson
> wrote:
>
> > > I wonder what effect could be had by rate-limiting the PID output to
> > > the motors?
> >
> > Integrator should ideally have anti-windup.
>
> Anti-windup is a little different.
>
> I was actually thinking about experimenting
On 07/23/2020 12:00 AM, andrew beck wrote:
Yes I'm not worried about servo following error spikes. But I'm shaking my
whole machine to death. As the acceleration is instantly on. In contrast
a friend's okuma can go at 40m/min without shaking. Which is amazing to
watch. They are both similar
On Thursday 23 July 2020 07:53:45 andy pugh wrote:
> On Thu, 23 Jul 2020 at 12:47, Nicklas SB Karlsson
>
> wrote:
> > > I wonder what effect could be had by rate-limiting the PID output
> > > to the motors?
> >
> > Integrator should ideally have anti-windup.
>
> Anti-windup is a little
чт, 23 лип. 2020 о 14:58 andy pugh пише:
> I was actually thinking about experimenting with a limit3 HAL
> component between the PID and the PWM.
>
KFLOP has lowpass filter
http://dynomotion.com/Help/KMotionCNC/TrajectoryPlanner.htm
WBR,
Andrew
___
On Thu, 23 Jul 2020 at 12:47, Nicklas SB Karlsson
wrote:
> > I wonder what effect could be had by rate-limiting the PID output to
> > the motors?
>
> Integrator should ideally have anti-windup.
Anti-windup is a little different.
I was actually thinking about experimenting with a limit3 HAL
> > I have been noticing a bit of jumping around
> > when doing parallel finishing 3d passed on it at high speed.
>
> I wonder what effect could be had by rate-limiting the PID output to
> the motors?
Integrator should ideally have anti-windup. Know about and how it should be
implemented?
On Wed, 22 Jul 2020 at 21:54, andrew beck wrote:
>
> I have been noticing a bit of jumping around
> when doing parallel finishing 3d passed on it at high speed.
I wonder what effect could be had by rate-limiting the PID output to
the motors?
You would expect it to increase following-error (but
A couple of sources:
http://www.mesanet.com/pdf/motion/softdmc.pdf 50 us cycle -:)
Some years ago a masters candidate in ME at UBC did her thesis on motion
control with jerk limiting and sine wave accel. I used to have a copy of
it but cannot find it.
IIRC is would be post 2005 and
Yes I'm not worried about servo following error spikes. But I'm shaking my
whole machine to death. As the acceleration is instantly on. In contrast
a friend's okuma can go at 40m/min without shaking. Which is amazing to
watch. They are both similar size
On Thu, Jul 23, 2020, 9:42 AM Nicklas
> hey guys
>
> I have a relatively high speed machine (3kw motors 16mm pitch ballscrews)
> 35mm linear rails, and weights 5.8 ton. I think it used to go 20m/min
> with the heidenhain control. I have been noticing a bit of jumping around
> when doing parallel finishing 3d passed on it at high
hey guys
I have a relatively high speed machine (3kw motors 16mm pitch ballscrews)
35mm linear rails, and weights 5.8 ton. I think it used to go 20m/min
with the heidenhain control. I have been noticing a bit of jumping around
when doing parallel finishing 3d passed on it at high speed. and
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