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  • PCW
  • PCW's Avatar
27 Oct 2025 15:07
Replied by PCW on topic Which LinuxCNC HW for 2026+?

Which LinuxCNC HW for 2026+?

Category: General LinuxCNC Questions

Other possibilities:

Make sure you use a pncconf or MesaCT created configuration for Mesa hardware
as these use a number of techniques to minimize timing related  following errors:

1. Using the DPLL to retime the position sampling
2. Using the stepgens in velocity mode with a PID loop
3. Using a small PID max_error value so a dropped packet does not cause a
large bogus correction because of stale stepgen position data

#2 is especially important

To check network latency:

sudo chrt 99 ping -i -q -c 60000 [mesa_card_ip_address]

This will run for one minute and then print timing statistics.

Other possibilities are using a newer Kernel, the default RT kernels used with Debian seem
quite poor latency wise (using 6.17 currently and its decidedly better than earlier kernels)

Pinning the Ethernet IRQ to the last processor also helps (if you also isolate the last processor
on your grub command line, or however you do it on the RPI)
 
  • jmp97
  • jmp97
27 Oct 2025 15:04 - 27 Oct 2025 15:05
Replied by jmp97 on topic LinuxCNC installation + 7I96S

LinuxCNC installation + 7I96S

Category: Installing LinuxCNC

Sorry about that. I'm attaching the files. With PNCConf, I couldn't get a configuration that would even allow LinuxCNC to exit emergency mode.  

File Attachment:

File Name: 7i96s.ini
File Size:5 KB
 

File Attachment:

File Name: hm2-stepper-eth.hal
File Size:6 KB
  • PCW
  • PCW's Avatar
27 Oct 2025 14:51
Replied by PCW on topic Mesa7i96s and Postep60-250?

Mesa7i96s and Postep60-250?

Category: General LinuxCNC Questions

Did you check that you have 0V at the enables when LinuxCNC is on the power-on and EStop released state?

How are you checking motion? With normal homing setup (with home switches),
you will not be able to jog until the machine is homed.

If the enables are at 0V, anther sanity check to do is to jog in either direction
and check that the DIR pin changes polarity.
  • PCW
  • PCW's Avatar
27 Oct 2025 14:44
Replied by PCW on topic MESA 7I92 programming

MESA 7I92 programming

Category: Driver Boards

It only gave me a blank page, I tried several times all day.

That's very strange as the link should not open a webpage at all since it's a direct file download link.
  • tommylight
  • tommylight's Avatar
27 Oct 2025 14:19
Replied by tommylight on topic Flex GUI - MDI Button

Flex GUI - MDI Button

Category: Flex GUI

Should be easier to set the "double click" speed for the mouse in the mouse settings, from Linux settings.
This is from Mint, but should be similar on XFCE.

  • MaHa
  • MaHa
27 Oct 2025 13:02
Flex GUI - MDI Button was created by MaHa

Flex GUI - MDI Button

Category: Flex GUI

When the mdi-button is doubleclicked accidentally or just clicked multiple times in a short period, 
the mdi command is executed , mostly uwanted, multiple times. Is it possible to lock the button for
0.5 second or an adjustable value? 
  • amanker
  • amanker
27 Oct 2025 12:25
Need Help in Kinamatics of Small DIY 6dof robotic arm. was created by amanker

Need Help in Kinamatics of Small DIY 6dof robotic arm.

Category: Advanced Configuration

I have configured and installed LinuxCNC on RPI5 and I can control individual joint of robotic arm using trivkins. Using PCA9685 as PWM servo controller. Its work good. But I am strugling to get its kinamatic working. Here is photo of my arm with measurements. 
Here is photo of My robotic arm
 

Here are the pin values I used in genserkins
setp genserkins.A-0 0
 setp genserkins.ALPHA-0 0
 setp genserkins.D-0 83.5
 setp genserkins.A-1 45
 setp genserkins.ALPHA-1 -1.570796327
 setp genserkins.D-1 0
 setp genserkins.A-2 100.4
 setp genserkins.ALPHA-2 0
 setp genserkins.D-2 0
 setp genserkins.A-3 12
 setp genserkins.ALPHA-3 -1.570796327
 setp genserkins.D-3 195
 setp genserkins.A-4 0
 setp genserkins.ALPHA-4 1.570796327
 setp genserkins.D-4 0
 setp genserkins.A-5 0
 setp genserkins.ALPHA-5 -1.570796327
 setp genserkins.D-5 58
  • unknown
  • unknown
27 Oct 2025 12:06
Replied by unknown on topic Proposal RPi Linuxcnc Image Based on Raspi OS All welcome/encoraged to comment

Proposal RPi Linuxcnc Image Based on Raspi OS All welcome/encoraged to comment

Category: Installing LinuxCNC

I'll have a look at updating tomorrow and see how it goes.

It would appear the boot splash issue has been resolved.

Now I've looked through the threads on images and it's time for suggestions for splash, login and background images. Splash images have to be smallish PNG files.
  • unknown
  • unknown
27 Oct 2025 11:59 - 27 Oct 2025 23:09
Replied by unknown on topic 2.9.5 should not be available to download due to it being broken.

2.9.5 should not be available to download due to it being broken.

Category: Installing LinuxCNC

I think those Trixie files may have been built on Bookworm, when I built an image last night it pulled the Linuxcnc packages from Debian. Trying to manually install brought up a lot of messages regarding packages that could not be installed.
sudo apt install linuxcnc-uspace=1:2.9.6 linuxcnc-uspace-dev=1:2.9.6
Solving dependencies... Error!  
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

Unsatisfied dependencies:
 linuxcnc-uspace : Depends: python3 (< 3.12) but 3.13.5-1 is to be installed
                   Depends: libboost-python1.74.0 (>= 1.74.0+ds1) but it is not installable
                   Depends: libboost-python1.74.0-py311 but it is not installable
                   Depends: libgpiod2 (>= 1.5.1) but it is not installable
                   Depends: libpython3.11 (>= 3.11.0) but it is not installable
                   Recommends: hostmot2-firmware-all but it is not installable
Error: Unable to correct problems, you have held broken packages.
Error: The following information from --solver 3.0 may provide additional context:
   Unable to satisfy dependencies. Reached two conflicting decisions:
   1. linuxcnc-uspace:arm64=1:2.9.6 is selected as an upgrade
   2. linuxcnc-uspace:arm64=1:2.9.6 Depends python3 (< 3.12)
      but none of the choices are installable:
      [no choices]
  • rodw
  • rodw's Avatar
27 Oct 2025 10:58
Replied by rodw on topic 2.9.5 should not be available to download due to it being broken.

2.9.5 should not be available to download due to it being broken.

Category: Installing LinuxCNC

DO we actually need an image anymore of the Pi is using Trixie? Why not just try one of the official Deb files here?
linuxcnc.org/dists/trixie/2.9-uspace/binary-arm64/
  • rodw
  • rodw's Avatar
27 Oct 2025 10:51
Replied by rodw on topic Proposal RPi Linuxcnc Image Based on Raspi OS All welcome/encoraged to comment

Proposal RPi Linuxcnc Image Based on Raspi OS All welcome/encoraged to comment

Category: Installing LinuxCNC

Now that I have a working Trixie image, one image will work for the 4 & 5 would it be useful for package building for Trixie ?

I doubt it. As of today Andy has got GitHub workflows working for all OS'es including Trixie for both AMD64 and ARM and a full complement of builds on our repo at linuxcnc.org/dists
  • rodw
  • rodw's Avatar
27 Oct 2025 10:46
Replied by rodw on topic Workshop update

Workshop update

Category: Show Your Stuff

Young??? I am 55! :)
And the dog got banned from the shop for a while as i got tired of monitoring her so she does not pee at everything! :)
 

Young!!! you are still a veritable pup compared to some of us like me!
  • rodw
  • rodw's Avatar
27 Oct 2025 10:44
Replied by rodw on topic Which LinuxCNC HW for 2026+?

Which LinuxCNC HW for 2026+?

Category: General LinuxCNC Questions

With newer operating systems like bookworm, there is a huge number of additional features outside of linuxcnc that affect real time and network latency. Plus the world is more complex so there is more hardware to consider. Plus the big push to power saving features has permeated everything.

If you are not using a parallel port, the old latency test is not relevant. Its all about network latency. The network is not real time but we want it to be.

Probably the biggest issue is using the wrong network driver (mainly on Realtek NICs), followed by NIC interrupt affinity. By default all system interrupts including the NIC's are placed on CPU 0 so we need to move the interrupt for your NIC to another core.  

I think this means you now need at least a 4 core CPU (eg Celeron J1900 or higher) as you need to have CPU 0 for the system and a core for the NIC and a core for the real time servo thread.

In summary, if you are not prepared to oprimise the OS for a RT environment, stay on an old and obsolete OS and hardware.
  • Hakan
  • Hakan
27 Oct 2025 08:42
Replied by Hakan on topic New ethercat / probe basic control for minimonster

New ethercat / probe basic control for minimonster

Category: CNC Machines

I have had to set some register in the drive to make it use Modbus.
Could be permission problem, almost anything.
Load the modbus driver only using halrun and diagnoze from there.
Something like this forum.linuxcnc.org/24-hal-components/310...-speed-control#75848
but for your Modbus drive, not the huanyang.
  • TripleM
  • TripleM
27 Oct 2025 08:39
Replied by TripleM on topic Additional hardware-button for coolant

Additional hardware-button for coolant

Category: Gmoccapy

toogle2nist works perfectly, but I have to change the debouncetime in the componet. it will be more comfortable if the debounce-time is changed by a hal pin
loadrt toggle2nist names=toggle.coolant
addf toggle.coolant    servo-thread

net coolant_is_on toggle.coolant.is-on <= halui.flood.is-on
net coolant_button toggle.coolant.in <= emcopanel.coolant

net coolant_on toggle.coolant.on => halui.flood.on
net coolant_off    toggle.coolant.off => halui.flood.off
component toggle2nist "toggle button to nist logic";

pin in bit in  "momentary button in";
pin in bit is_on "current state of device";
pin in unsigned debounce = 50 "debounce delay for 'in'-pin in cycles";
....
....
    
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