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  • 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
  • rodw
  • rodw's Avatar
13 Mar 2025 06:36
Replied by rodw on topic QTPlasmaC post processor - SheetCam?

QTPlasmaC post processor - SheetCam?

Category: Plasmac

Yeh, that's the one! I made some enhancements for it and Les added it to Sheetcam. There are some settings at the top of the post to check and turn off. I made it so Sheetcam was the master seeing it was for his system
  • Darium
  • Darium
13 Mar 2025 06:14
Replied by Darium on topic Problems with Lichuan Ethercat servo drive

Problems with Lichuan Ethercat servo drive

Category: EtherCAT

@ihavenofish
Wow that's nice. Having 3 ton machine moving like that also with the current jerkness is too scary definitely not good for my heart.
@LCR
I have similar issue with non-ethercat drivers. you can check it out this thread. It may help
forum.linuxcnc.org/38-general-linuxcnc-q...s-creeping-up#309973
  • stkvit
  • stkvit
13 Mar 2025 05:52
Replied by stkvit on topic Laser Head Height Sensor – Looking for a Beta Tester

Laser Head Height Sensor – Looking for a Beta Tester

Category: Plasma & Laser

I converted the bcl-amp output to a differential signal (max485), at a long length it works much more stably and reliably. You should do the same (I understand that your frequency is linear and depends only on the height). A couple more questions, your sensor have temperature stabilization?
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