Linuxcnc Image for Raspberry Pi 3

Does anyone have an image they could share for Linuxcnc for a Pi 3? I know this Pi is not as preferred as the 4, but it should do fine with the 7C80 I have it mounted on (using SPI instead of ethernet). Most of the links I have found in this forum using the search no longer work.

Thanks,

Travis

My understanding is that that image is for the Pi4. I did try it however, and it did not boot on the Pi3- I got a rainbow screen with no progress from there.

Thanks though!

I think I'd try getting Debian 11 up and running. Then get the preempt_rt  kernel from the debian repos.
You will need to compile Linuxcnc from scratch but that is not overly hard (not sure on the Pi though)

This just came up on Youtube yesterday.
It's not a link to a compiled image but worth a look.



I have just compiled linuxcnc on an Xubuntu system to use as a simulator for checking gcode files, it is not difficult just a bit of a faff managing dependencies.

After some research and fiddling, I was able to get the 2.8.0 image to boot on my PI 3B!

In config-rt.txt file on the SD card (once the image was flashed to the SD using the Raspberry PI tool) I changed this:

[pi4]
kernel=vmlinuz-4.19.71-rt24-v7l+
force_turbo=1

to this:

[pi3b]
kernel=vmlinuz-4.19.71-rt24-v7l+
force_turbo=1

I still got the CPU 0 error on initial power up, but it seems to boot and work just fine. 

On version 2.8.1, I did the above, plus renamed the kernel from kernel7l to kernel, and it booted just fine as well!

not understand what is compile and how need do ? or have ready to use image to rpi3.
i looking make rpi3 linuxcnc small cnc my son.
or how kernel need use or how can change kernel or what need doing. too hard all linux system but have only what can use good whit linuxcnc and rpi3 board. not want buy old computer and paraller port use this.

this link has only pi 4 images, not any oi 3. what need doing can use pi 3 and linuxcnc, what is patch and how need doing, or what need doing, not understand , ready to install pi 3 image only need how need patch or what this mean and how change kernel if need no understand anything linux and code, secret engineer language all.