Steppers stuttering

Hello,

I just got my machine working with LinuxCNC and I got a bit off a problem.
I see the machine stuttering when running a program. 
My first thought was it's something in the wiring or something mechanically... but then I thought it might be in the timings.
Something I need to explore, but not sure how.

This doesn't occur when I jog the machine, but only when I run a program... the faster it goes the stutter inceases exponentionally, even when I do air milling.
From what I can see it has more trouble in arcs or corners.

Some info about the machine:
I have a double gantry machine (MPCNC) with 5 steppers and 5 drivers, 2 for X, 2 for Y and 1 on Z-axis.
The drivers I'm using are Leadshine DM542's which I couldn't find timings for.... so maybe there lies a problem.

Info about the PC:
Dell Optiplex 780
Core2duo E8500
8 GB RAM

I've attached my INI and HAL file, could someone have a look at stepper timings and base/servo thread?
Anyone has a clue what could be the problem?

Thans in advance!

EDIT: After running the driver tuning, switch the '4' it's becomming way less, but it's still there...

 

What version of LinuxCNC?
What kernel version?
Do you get latency warnings?
setp parport.0.reset-time 2500
that is to low for cheaper drives, set it to at least 5000
If you do get latency warnings, change
BASE_PERIOD = 60000
to 100000 or 150000 or 200000 until you get no warnings.

Thanks for the reply Tommy!

Version of LinuxCNC:
LinuxCNC 2.8.2 Debian 10 Buster PREEMPT-RT ISO

I don't get latency warnings.

I'll change the 'setp parport.0.reset-time 2500' to 5000

setp parport.0.reset-time 2500

I changed this to 5000, but no luck...

These are the timing settings in the HAL file, but why steplen 1 and stepspace 0? image missing /media/kunena/emoticons/sad.png
setp stepgen.0.steplen 1
setp stepgen.0.stepspace 0
setp stepgen.0.dirhold 30000
setp stepgen.0.dirsetup 28000

When the parport components reset mode is used,
the steplength is set by the reset-time parameter and
stepspace must be set to 0 for the reset mode to work
with the stepgen.

There is a more complete description in the hal_parport manual page:

man hal_parport

Thanks for the explaintion!

I'm still not sure what value I need to set the dirhold and the dirsetup to...