Steppers stuttering

Yes, but am on the phone, will have a look when i get to a PC.

Make a video and upload to youtube or google drive so we can have a look and hear what is going on.

Hello,
you will find in these videos the stuttering of my machine especially at the level of the sound, we have difficulty to discern it on the video.
this is effective when the 3 or 5 axes work at the same time
we can also see that the speed of the spindle is not stable at all

Thank you

drive.google.com/file/d/10yjmoSqWD_KEx2S...rAj/view?usp=sharing
drive.google.com/file/d/11-D6vAHS3xeLqfO...a0i/view?usp=sharing
drive.google.com/file/d/112KYowyjWc_K9nN...fOu/view?usp=sharing

I explicitly asked a few posts back if you are getting latency warnings when using LinuxCNC, and you said NO!!!
Why would you waste our time like that, the video shows the warning, machine will not work properly until you fix the latency issue by:
-disabling everything related to hyperthreading, power saving, c states, virtualisation, etc in the PC's BIOS
-setting the base period higher till there are no more latency warnings
-use the RTAI kernel since you are using the parallel port.
-change the PC, but finding a new PC with a parallel port is getting hard. Dell 980 towers are good.

excuse me, not speaking English, it is often difficult for me to understand everything

Thank you

JackRay wrote:

excuse me, not speaking English,

Well, now you tell us!
I was sure from the writing you were a native English, sorry about that.
back on topic,
Latency warning is the popup on the right bottom side with a red circle and an x in it, it is warning that the PC could not produce the steps at a constant rate, that is why the machine stutters as the steps train is not consistent.
The same goes for spindle, the PC is not able to keep the PWM output constant.
Please check and fix the 4 things i mentioned above, one by one till there is no more warning.