On Sun, Aug 22, 2021 at 5:15 PM John Dammeyer
wrote:
>
>
> What's the goal? To traverse the path as accurately as possible or to
> reduce the shaking from sudden speed changes (the jerk)?
>
"jerk" is not a chance in speed. Jerk is change in acceleration.
Planning an optimum jerk limited curve
and I will be a happy man once some wonderful person works it out:)
On Mon, Aug 23, 2021 at 1:49 PM Curtis Dutton wrote:
> The goal is allow both accuracy and speed. However there is a tradeoff
> between those two just as there is now.
>
> During any move all vel, acc, jerk values must be coord
No closed form solution. The develop a cost function and use
numeric optimization to find lowest cost. This is what Boston Dynamics
does now and they do it in real time.
The idea was first used for process control in oil refineries but it works
in any case where the forward comutions is "easy"
The goal is allow both accuracy and speed. However there is a tradeoff
between those two just as there is now.
During any move all vel, acc, jerk values must be coordinated to follow a
given path. For a coordinated move any limiting constraints will limit the
other related joints to prevent viola
This jerk control raises some questions for me. They probably have simple
answers rather than as complex as jerk control but perhaps it's related.
Each axis has a MAX_ACCELERATION value. Simple math says that if X and Y are
moving at an identical velocity then the path of the tool is 45 degree
I have a desire to implement this.
My business is in need of another cnc router and I will be building as
high speed of a machine as I can afford. It is going to be a dual table but
a horizontal spindle. 1m x 1m working envelope. I plan on using linear
motors.
It will require jerk limiting to re
On Sunday 22 August 2021 01:06:24 dva...@internode.on.net wrote:
> On 21.08.21 08:50, Gene Heskett wrote:
> > The default desktop, xfce4, of our buster installer, steals the
> F10 key
> > to bring up the terminals menu pulldown. But for an old hand
> that's a
> > pain in the ass because it
