LinuxCNC S-Curve Accelerations

Share the gcode please, and we will take a look next week

He did but you probably did not get a notification as he edited the existing post.

@PCW

try with

setp ini.traj_max_jerk 3000
and
setp ini.traj_default_jerk 3000

I do not get acc violation with these values, can you confirm?

@ruediger123

at the moment jerk-cmd are debug pins, they are not to be used for machine control, because the current calculations try and do best we can to calculate and blend quickly in realtime, there are knowm spikes in the jerk-cmd, please look at vel-cmd and acc-cmd everything looks very good to me there, there are no violations there, if we were to respect jerk cmd strictly the interpolation would not be able to run as fast as it does, but we could look at making a stricter mode viable as an alternative, or possibly the default if that's what the community needs.

@grandixximo

when I initiate the jerk, you should stick to that.
Does interpolation refer to the movement of the axes or the speed of the calculation?
If the movement of the axes is meant, I can specify a higher jerk.

If I have a stiff machine, I can apply a high jerk and the axles will move smoothly (no overshooting or anything like that). With a soft machine, I have to set a small jerk, otherwise the axles will move erratically (overshooting or anything like that).
Acceleration also plays a role, of course.

If the jerk is maintained, I can adjust the axles properly.
For example, a small jerk and high acceleration.
If the jerk is not maintained, I have to specify a lower acceleration so that the axles run smoothly.

Both need to be taken into consideration, calculation speed and joints movements, will try to cap to max