LinuxCNC S-Curve Accelerations

Hi all,

For info.
The distro is updated to use Debian 13 and linuxcnc scurve + ethercat.
There where some problems to get ethercat running on linuxcnc, these are now solved.

repository.qtpyvcp.com/repo/linux-distro/

The debian-disk.img.7z is to use directly in qemu vm.
The debian-raw.img.7z is to be copied to usb.
 

Hi,

the latency debian 13 is very bad.
We have to come up with an idea to
solve this.
 

Grotius wrote:

Hi,

the latency debian 13 is very bad.
We have to come up with an idea to
solve this.

 

Latency or network latency?

HI Rod,

A tester send me this :
Debian 10 : jitter max 45200
Debian 12:jitter max 29000
Debian13:jitter max 522000

Ir looks very bad.

Debian 13 does not seem to be using an RT kernel, based on the numbers, but it just might be, i know i had worse on a new PC back in 2020, with RT kernel it would not do anything under 6000000 (yes 6 million).
That was an outlier as i have used over 50 PC and laptop from then, but never that terrible.
I do have a Dell laptop that does that, even with RTAI kernel, if anyone is interested.

The used kernen in debian 13 :
linux-image-6.12.21-rt-amd64

I havent done the latency myself so far.
For the tester i will make a debian 10 with his current kernel.

But somehow we need a better kernel for debian 13. This looks not usable at all.