LinuxCNC S-Curve Accelerations

Hi all,
Attached please find a pdf describing the math for the proposed jerk limited planner to be added. It is done by AI, and I want to put it up for community comments.  
I would be happy to discuss the approach and incorporate suggestions and make modifications to this plan as the discussion evolves.
-automata

I got this error. I reduced the acceleration slightly, and after that I produced 20 parts without any errors. Today the same error appeared again. I then restarted the same program, and so far there have been no errors.

 

on another part I get this error
 
ps:

I reduced the maxj quite a bit, but there is no change. I think it is related to the synchronized movement of the spindle.
 
 

Have patch waiting to merge to silence those.

We have been stuck on the feed override for TP2, doing it proper without any jerk spikes, is proving much harder than we thought.

Hi grandixximo,
We really appreciate your dedication to solve the jerk limiting trajectory planner issue.
Can you share the update on any git repo to get wider community feedback started?
Looking for to testing the new fixes.

-automata

Grandixximo just wanted to ask have you done any work to fix the lookahead on multiaxis movements.  on the old trajectory planner the lookahead reverts to slower movement (almost no lookahead) when using a 4th axis.  or any extra axis after 3 axis  it's a real pain when machining

i have been playing with scurve sim but can't work out if it fixes the issue yet. so thought i would ask a question about it here

cheers

automata wrote:

Hi grandixximo,
We really appreciate your dedication to solve the jerk limiting trajectory planner issue.

+1
And for Grotius as i think he started this journey and got lost along the way...
I have no use for it yet, but i have a 3.5 ton Mazak that should benefit from this whenever i get to actually use the machine.