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  • hitchhiker
  • hitchhiker
13 Mar 2025 07:28
Replied by hitchhiker on topic Kernel 6.12 with PREEMPT_RT patches enabled - yet POSIX non-realtime (LM22.1)

Kernel 6.12 with PREEMPT_RT patches enabled - yet POSIX non-realtime (LM22.1)

Category: Installing LinuxCNC

Hi Royka in the past you give me a link to a kernel.. the link no more work.. :( is there a new version of a kernel for the latest linuxcnc? i am on mesa.. rtpreempt 6.1.0-31.


the kernel you link me was :

royka post=299706 userid=31446
Which kernel do you run at Debian 10? "uname -a"
What is the result of "cat /proc/cmdline" on Debian 10 and 12?
What is the result of "cat /proc/interrupts" ?

This kernel I've compiled last week by the way (6.9.0-rc5):
drive.google.com/drive/folders/1L28lG0zD...2XQJx?usp=drive_link




can you please help me.. i make fresh install on the same machine and done everything but the kernel is needed to get it work perfect.... i see that the kernel which came with the latest linuxcnc iso doesnt work like my machine before...


thanks
  • royka
  • royka
13 Mar 2025 07:06
Replied by royka on topic Can't eek out that last bit of jitter

Can't eek out that last bit of jitter

Category: General LinuxCNC Questions

I've never used rtai, but run latency-history and htop, sort by priority (F6?) and you'll see. I think you could use the same script.
Bad RAM memory could be a cause, usually using 2 ram modules (of the same) is better so it can use DDR. But if one of the two is bad removing one or the other might give a better result.
HDD can also be a cause, if you still use that buy a cheap SSD.
Disconnect any CD/DVD drives, SD-reader units.
  • Aciera
  • Aciera's Avatar
13 Mar 2025 06:54
Replied by Aciera on topic Incorporating HAL script recommendation (2.7.14 to 2.9.4 conversion of XZC

Incorporating HAL script recommendation (2.7.14 to 2.9.4 conversion of XZC

Category: General LinuxCNC Questions 

./Lxzc3-12-25rev4.hal:201: Ini variable '[SPINDLE_9]P' not found.

1. Your ini is missing the spindle section while your hal references 'SPINDLE_9' ini entries. Looking at your hal file makes me think that you are not actually using a spindle setup. If that is the case then you might want to completely remove this section from your hal:
#*******************
#  SPINDLE S
#*******************

setp   pid.s.Pgain     [SPINDLE_9]P
setp   pid.s.Igain     [SPINDLE_9]I
setp   pid.s.Dgain     [SPINDLE_9]D
setp   pid.s.bias      [SPINDLE_9]BIAS
setp   pid.s.FF0       [SPINDLE_9]FF0
setp   pid.s.FF1       [SPINDLE_9]FF1
setp   pid.s.FF2       [SPINDLE_9]FF2
setp   pid.s.deadband  [SPINDLE_9]DEADBAND
setp   pid.s.maxoutput [SPINDLE_9]MAX_OUTPUT
setp   pid.s.error-previous-target true

net spindle-index-enable  <=> pid.s.index-enable
net spindle-enable         => pid.s.enable
net spindle-vel-cmd-rpm    => pid.s.command
net spindle-vel-fb-rpm     => pid.s.feedback
net spindle-output        <=  pid.s.output

# ---setup spindle control signals---

net spindle-vel-cmd-rps       <=   spindle.0.speed-out-rps
net spindle-vel-cmd-rps-abs   <=   spindle.0.speed-out-rps-abs
net spindle-vel-cmd-rpm       <=   spindle.0.speed-out
net spindle-vel-cmd-rpm-abs   <=   spindle.0.speed-out-abs
net spindle-enable            <=   spindle.0.on
net spindle-cw                <=   spindle.0.forward
net spindle-ccw               <=   spindle.0.reverse
net spindle-brake             <=   spindle.0.brake
net spindle-revs               =>  spindle.0.revs
net spindle-at-speed           =>  spindle.0.at-speed
net spindle-vel-fb-rps         =>  spindle.0.speed-in
net spindle-index-enable      <=>  spindle.0.index-enable

# ---Setup spindle at speed signals---

sets spindle-at-speed true
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